A polar covalent bond occurs when one of the atoms in the bond provides both bonding electrons. The statement is false.
A polar covalent bond occurs when two atoms share a pair of electrons unevenly, meaning that one atom has a greater electronegativity than the other atom.
This results in a partial positive charge on the less electronegative atom and a partial negative charge on the more electronegative atom, creating a dipole.
The situation described in the statement, where one atom provides both bonding electrons, refers to an ionic bond. In an ionic bond,
one atom transfers its electrons to another atom, creating a positively charged cation and a negatively charged anion. These oppositely charged ions are then attracted to each other, forming the ionic bond.
In summary, the statement is false because a polar covalent bond involves the unequal sharing of electrons between two atoms,
while the scenario described refers to an ionic bond where one atom provides both bonding electrons.
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A 58.0 g sample of unknown composition was carefully analyzed and found to consist of 24.3 g of carbon, 3.072 grams of hydrogen, 5.406 g of oxygen, and the remainder of nitrogen.
Answer:
Mass of nitrogen = 25.222g
Explanation:
We know that the mass of the unknown composition is 58.0g, so the total mass must add up to 58.0g, so let's make the unknown mass of nitrogen = x
24.3g + 3.072g + 5.406g + x = 58.0g
32.778g + x = 58.0g
x = 58.0g - 32.778g = 25.222g
12.0 grams of Barium nitrate react with 6.0 grams of sodium sulfate in a double replacement reaction.Write out the complete balanced reaction including states of matter: What is the theoretical yield of solid compound that we will be able to produce?B.What is the limiting reactant and excess reactant?C. Calculate the quantity of excess reactant remaining.D. Suppose in the lab you actually collected 9.5 grams of the solid compound. Calculate the percentyield of the reaction
A chemical equation shows the reactants (left side) and products (right side) in a chemical reaction.
What is chemical reaction?chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.Chemical reactions are an integral part of technology, of culture, and indeed of life itself. Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. Chemical reactions abound in the geology of Earth, in the atmosphere and oceans, and in a vast array of complicated processes that occur in all living systems.
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0.0269 moles of CaO are reacted, how many grams of CaOH2 will be produced
Answer:
Ok so, 0.0269 moles of CaO are reacted, how much of CaOH2 will produce.
Explanation:
How many grams are in a mole of Ca OH 2?
74.093 grams
so you need to multiply 0.0269 * 74.093 = 1.9931017
so 1.9931017 CaOH2 will be produced
Complete the Lewis dot structure for C2F6 (which contains a C?C bond). Complete the molecule by placing fluorine atoms on the grid and connecting them with bonds. Include all lone pairs of electrons.
Lewis structure is the representation of the valence shell electron in a molecule. Lewis structure of C2F6 can be represented by the Lewis dot structure rule.
Lewis dot Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms. First we have to draw a skeletal structure for the molecule. Then Count total number of valence electrons in the molecule. Then assign 2 electrons to each bond. If there are remaining electrons, they can be used to complete the octet of the central atom. If we have run out of electron, we are required to use lone pairs of electrons from a terminal atom to complete the octet on the central atom by forming multiple bond(s).
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use the table of temperatures measured in two areas of a house to answer the question
which statement best explains the temperature difference?
A. energy is transferred between the areas when molecules touch
B. energy from the cooler air is transferred upstairs
C. the cooler air downstairs loses energy to the environment
D. warm air rises by convection to the upstairs
According to the concept of thermal energy, the statement which best explains the temperature difference is that warm air rises by convection to the upstairs.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
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3-less than or equal to -5x graph in slope intercept form question #9
9. The slope for the given equation 3- y ≤ -5x is 5 and intercept is 3.
What is meant by slope intercept method?Slope-intercept form (y=mx+b) of linear equations highlights the slope (m) and y-intercept (b) of line. The slope intercept formula y = mx + b is used when you know the slope of line that is to to be examined and point given is also the y intercept (0, b). In this formula, b represents y value of the y intercept point.
The slope intercept for of linear equation is: y = mx +b
m is slope and b is y intercept.
So, y = 5x + 3
Now m = 5 ; so the slope is 5
b = 3 ; hence y-intercept is 3
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Which of the following groups contains the most reactive elements?a. the alkali metalsb. the alkaline earth metalsc. the carbon familyd. the noble gase
Option (a) is correct. The alkali metals contains the most reactive elements. It is present in the group 1 of the periodic table.
In the periodic table, Group 1 includes hydrogen and the alkali metals. Because they have just one valence electron, group 1 elements are very reactive. The atoms of Alkali metals can easily give away the one outer-level electron. This is due their larger atomic radii and low ionization energies. These metals are most reactive. Alkali metal tend to donate their electrons in reactions and have an oxidation state of +1. These alkali metals are characterized by their soft texture and silvery color. They have low boiling point and melting points. These are less dense. Lithium, sodium and potassium float on water because of their low density. This explains the alkali metals.
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draw the structure of periodic acid hio4 optimize formal charges
The structure of periodic acid [tex]HiO_{4}[/tex] attached at end of the solution.
The formal charge of [tex]HiO_{4}[/tex] is zero.
Lewis structures illustrate the bonds forming between the various atoms in covalent compounds. These further demonstrate the molecule's lone pairs. Lewis dot diagrams, electron dot diagrams, Lewis dot structures, and Lewis dot formula are other names for them. These structures can predict the shape, polarity, and reactivity of covalent compounds.
First, determine the total number of valence electrons. The H atom (group 1) has one valence electron, the I atom (group 17) has seven, and the O atoms have six valence electrons (group 16).
Take two electrons away from each bond in the skeletal framework. In this form, the 5 bonds each receive 10 of the 32 valence electrons.
The other O atom receives the final two valence electrons, completing the octets for the terminal O atoms. Because the iodine atom does not yet have a complete octet.
The diagram is attached at the end of the solution.
Formal charge = v - l - [tex]\frac{b}{2}[/tex]
v = valence electron on a free atom
l = lone pair electrons in bonding atoms
b = bond pairs of electrons
Therefore formal charge on I = +3, 3O = -1
Thus formal charge of [tex]HiO_{4}[/tex] = zero.
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Calculate the number of molecules in 2.86 g CO2.
A. 6.48 x 1015
B. 1.30 x 1022
C.3.91 x 1022
D. 1.17 x 1023
E. 9.26 X 1024
Atoms constitute single neutral particles, and there are 3.91 x 1022 molecules in 2.86 g of CO2. By bonding together two or more atoms, molecules are neutral particles.
WHAT IS a molecule, and give some examples?The smallest component of a material, a molecule is made up of two or more atoms that are joined by chemical bonds and preserve the structure and characteristics of the larger substance. Chemistry is built on molecule-level principles. A subscript indicating the number of atoms is used after the element symbol to identify molecules.
How do you refer to the smallest molecule?An atom is the tiniest component of an element and shares all of its chemical characteristics with the element as a whole. Dalton's Atomic Theory was the first valid theory describing the makeup of stuff. 1. Atoms were indivisible and unbreakable, and they make up all matter.
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What is the best description of a mole?
A mole is described as the amount of substance that has as many particles as there are atoms in exactly 12 grams of carbon 12 isotope.
A mole refers to the amount of substance that has as many particles as there are atoms in exactly 12 grams of carbon 12 isotope. A mole shows 6.022×1023 particles irrespective of their nature. The symbol of a mole is 'mol'. And one mole is equal to 6.022×1023.
A mole is a standard scientific unit that measures large quantities of very small entities such as molecules, atoms, or other specified particles.
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Balance the following equations
N2O5 -> N2O4 + O2
KNO3 -> KNO2 + O2
NH4NO2 -> N2 + H2O
O3 -> O2
Zn + AgCl -> ZnCl2 + Ag
NaOH + H2SO4 -> NA2SO4 + H2O
Balance equation is 2NaOH + H2SO4 → Na2SO4+2H2O.
1) N2O5 -> N2O4 + O2 Balance equation
N2O5 = N2O4 + 1/2O2 eq. as written
N two on left and two on right
O five on left and six on right. Easiest fix make 1/2O2. Now O five on left and five on right.
Or multiply each side by two to get.
2N2O5 = 2N2O4 + O2
N is 4=4 and O is 10=10
2) KNO3 -> KNO2 + O2 Balance equation
On heating potassium nitrate decomposes to produce potassium nitrite along with oxygen gas.
The balanced chemical equation of the reaction is as follows-
2KNO3 ->2 KNO2 + O2
3) NH4NO2 -> N2 + H2O Balance equation
NH4NO2=2H2O+N2
N-2,2 balanced
H-4,4balanced
O-2,2balanced
4)O3 -> O2 Balance equation
is 2O3 = 3O2
5) Zn + AgCl -> ZnCl2 + Ag Balance equation
is Zn+2AgCl→ZnCl2+2Ag
6) NaOH + H2SO4 -> NA2SO4 + H2O Balance equation
is 2NaOH + H2SO4 → Na2SO4+2H2O.
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Which reaction would not occur as written due to the Activity Series of Metals (found in your Chemistry Reference Table)?
A. 3 Mg + 2 AlCl3 --> 3 MgCl2 + 2 Al
B. Al + NaCl --> AlCl3 + Na
C. Ca + CuCl2 --> CaCl2 + Cu
D. 2 K + 2 H2O --> 2 KOH + H2
The reaction Al + NaCl → AlCl₃ + Na among the given reactions will not occur according to the reactivity series. Therefore, option B is correct.
What is reactivity series?The reactivity series of metals can be described as the arrangement of metals in the decreasing order of their reactivities.
The metals at the top of the activity series are strong reducing agents as they can easily oxidize. These metals easily corrode. The reducing ability gets weaker moving down the series.
The electropositive elements reduce as move down the activity series of metals. All metals above hydrogen in the reactivity series emit hydrogen gas upon reacting with dilute HCl.
Aluminum metal lies down to the sodium metal so it can not displace sodium metal therefore, this reaction is not possible.
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2.
Much of the cost of coal use in the United States comes from transporting it across
the country. If 8% of the price of coal is spent on transportation, how much money is
lost to transportation per short ton?
The cost of coal per short ton in the United States is approximately $50. 8% of this would be $4, meaning that the amount of money lost to transportation per short ton is $4.
What is transportation?Transportation is the movement of people or goods from one place to another. It is a critical part of the global economy and is a key factor in the development of social and economic opportunities. Transportation is also an important factor in the quality of life of individuals and communities. There are many different types of transportation, including public transit, such as buses, trains, and subways; private transit such as taxis, carpools, and ride sharing; and personal transportation such as cars, motorcycles, and bicycles. Transportation is an essential tool for connecting people and goods to the places they need to go, and for providing access to essential goods, services, and opportunities. It is also a key factor in the development of cities and urban areas, as well as in the movement of people and goods between countries and continents.
This is due to the cost of transporting coal from the mine to the point of sale, which can include costs such as fuel, labor, and infrastructure.
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How many atoms are in 0.540 moles of sodium?
Answer:
3.24108 Raised to 23 I'm pretty sure
A and B are independent events. Find P(A and B).
1
3
P(A) = P(B) = 7
P(A and B)=
elements If Actions A and B exist independent, then P(A or Bi) = P(A) Plus P(B) - P(A or B) = 7/9 is the chance that either Incident A or Event B will occur.
CAN A and B be independent and mutually exclusive?It is crucial to remember that two mutually incompatible events cannot coexist unless one of them has a probability of occurring, as P (A B) = P (A) P (B) for independent events, and the sole way a product may equal zero is if either of the elements is also zero.
What is the likelihood of two related events?dependent occurrences When the result of the first event affects the result of the second event, two events are dependent. The likelihood of two connected events is the.
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Determine whether 1-chloro-2-methylbutane contains a chiral center. How many different substituents do you count at atom #(2)? (To help yourself, draw 1-chloro-2-methylbutane on a piece of paper.). Submit Answer Try Another Version 1 item attempt remaining
1-chloro-2-methylbutane does not contain a chiral center. A chiral center, also known as a stereogenic center, is a carbon atom that is bonded to four different substituents.
In this molecule, the carbon atom at position 2 is bonded to a chlorine atom, a methyl group, and two methylene groups, so it is not a chiral center.
There are two different substituents at atom #2, a chlorine atom and a methyl group. This is because atom #2 is bonded to a chlorine atom and a methyl group, which are chemically distinct and different from one another.
It's worth noting that the presence of chiral centers in a molecule is important because it can give rise to stereoisomers, which are molecules that have the same chemical formula and bonding arrangement, but differ in the arrangement of atoms in space.
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What do the elements highlighted in red have in common?
answer choices
The same number of protons.
The same number of electrons.
The same number of neutrons.
The same number of electron shells
The elements highlighted in red have the same number of electron shells
in common. The correct answert is D.
A row of chemical elements makes up a period in the periodic table. The number of electron shells is the same for every atom in a row. Periods are the horizontal divisions or rows in the periodic table, and groups are the vertical divisions or columns.
Periods are shown in the table from top to bottom, numbered 1 through 7. Because they have the same number of orbitals, elements with the same period have identical masses but different characteristics. In other words, the electrons on the same outermost level, which is precisely the number that distinguishes each period, are a characteristic of the elements of a certain period. For instance, the third period elements have electrons up to level three.The number of the energy level increases as the periodic table's period numbers do.
The items with a red highlight share the trait of being from the same period, which is period two. As a result, electrons can now reach level 2.
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Round off to 3 sig figs-1638
1,640. The number is rounded up because the digit in the tenths place is 8, which is greater than or equal to 5.
What is rounded off?Rounding off is a mathematical process of replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. It is often done to reduce the number of significant figures in a calculation or to make calculations easier. Rounding off is used in many everyday situations, such as calculating a restaurant bill or estimating the amount of paint needed to paint a room. It is also used in more complex calculations, such as in scientific and engineering calculations.
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How many molecules are there in 295 grams of ammonia?
Answer:
295 g of ammonia = (17.32 mol x 6.022 x 10^23 molecules/mol) = 1.04 x 10^25 molecules.
Explanation:
hope this helps
Complete the abundance diagram. below, by identifying the species present n an aqueous solution of 1.00 M acetic acid (CH3COOH). The Ks, of acetic acid is 1 8 times 10-3 Noting to transcribe What is the approximate pH of a solution of 1.00 M CH3COOH?
The abundance diagram is as attached in the image.
The approximate pH of a solution of 1.00 M CH3COOH is less than 4.74.
In chemistry, pH, which originally stood for "potential of hydrogen," is a scale used to determine the acidity or basicity of an aqueous solution. Acidic solutions (solutions with greater H+ ion concentrations) have lower pH values than basic or alkaline solutions.
The pH scale may be traced back to a collection of standard solutions whose pH has been determined by worldwide agreement.
The potential difference between a hydrogen electrode and a standard electrode, such as the silver chloride electrode, is measured in a concentration cell with transference to derive primary pH standard values.
A glass electrode with a pH metre, or a color-changing indicator, can be used to test the pH of aqueous solutions. pH measurements are critical in chemistry, agronomy, medicine, water treatment, and a variety of other fields.
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Please help Chemistry will give brainliest if right!
54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4AI + 302 → 2Al2O3
Al: 27 g/mol Al2O3: 102 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[ ? ] g Al2O3
Answer: Don't know if this is right but try 102 g.
Explanation: I put this into acellus and it was correct so see if that works.
How many carbon atoms are there in 12.0 grams of carbon?
6.022 ×10²³ atoms are present in 12.0 grams of carbon.
Mole (mol) is the amount of material counting 6.02214 × 10²³ particles
The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12.
12.00 g C-12 = 1 mol C-12 atoms = 6.022 × 10²³ atoms
The number of particles in 1 mole is called Avogadro’s Number (6.0221421 x 10²³).
6.022 ×10²³atoms/1mol
or
1 mol/6.022 ×10²³ atoms
Molar Mass is the mass of 1 mol of atoms of an element
An element’s molar mass in g/mol is numerically equal to the element’s atomic mass in amu.
1 mol C/12.01 g C
or
12.01 g C/ 1mol C
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How are weather and climate different from each other?
Climate is the average weather of the area over a long term period. weather is short-term changes in the atmosphere
Answer: Weather refers to a short-term change in the atmosphere or temperature, while climate is over a long period of time.
How many grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH?
1.343 x 10²³ grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH.
What does Avogadro's number mean?The quantity of units in one mole of any substance is called the Avogadro number, also referred to as the Avogadro constant. The comparable number is 6.0221408571023. The units may be electrons, ions, atoms, or molecules, depending on the type of reaction occurring and the substance being utilized. Two gases of the same volume have the same number of molecules when they are at the same temperature and pressure, according to Amedeo Avogadro.
Given:
0.2228 mol of potassium hydroxide in 12.50 X 1019 molecules of KOH
Hence in one mole, there is Avogadro number of molecules
i.e. 6.023 × 10²³ molecules.
no of atoms = 0.223 x 6.023
= 1.343 x 10²³
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Predicting products of chemical reactions worksheet
Predict the products of the reactions below. Then, write the balanced equation and classify the reaction. If a
precipitate forms, indicate by using (s) by the precipitate. If "no reaction" occurs write N.R. beside the
question.
Use your activity series, predicting products helper sheet and the solubility rules.
1. magnesium bromide + chlorine →
2. aluminum + iron (III) oxide →
3. silver nitrate + zinc chloride →
4. sulfuric acid (H2SO4) + sodium hydroxide →
5. aluminum + oxygen →
Product prediction and solubility rules in the following chemical reactions
1. magnesium bromide + chlorineMgBr2 (aq) + Cl2 (g) → MgCl2 (aq) + Br2 (aq)
Reaction type: Substitution
2. aluminum + iron(III) oxide2 Al (s) + Fe2O3 (s) → Al2O3 (s) + 2 Fe (s)
Reaction type: Redox
3. silver nitrate + zinc chlorideZnCl2 + 2 AgNO3 → Zn(NO3)2 + 2 AgCl
Reaction type: Double substitution
4. sulfuric acid (H2SO4) + sodium hydroxideH2SO4 (aq) + 2 NaOH (aq) → Na2SO4 (aq) + 2 H2O (l)
Reaction type: Neutralization
5. Aluminum + oxygen4 Al (s) + 3 O2 (g) → 2 Al2O3 (s)
Reaction type: Oxidation
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Can someone help me please. The elements are made up but similar to real elements. Can someone check if my answers are correct. Please help someone. No fake answers please. I genuinely need help
Yes, it is the right response. Although the elements are imaginary, they resemble actual elements .Nomenclature is an organism name system used in biological classification.
What does nomenclature mean?The Latin words nomen (name) and calare (to call) are the source of the word nomenclature. Both the Latin word nomenclatura and the English word nomenclator, which also denotes a source or broadcaster of names, relate to a list of names.
What exactly is nomenclature and how is it crucial?Nomenclature is an organism name system used in biological classification. Genus & species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species whereby the creature belongs.
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Bromination of p-methylbenzoic acid
Chlorination of o-benzenedicarboxylic acid
Bromination of p-chlorobenzoic acid
Nitration of p-fluoroanisole
Nitration of p-methoxybenzaldehyde
Nitration of p-tert-butylmethylbenzene
When benzene has both a strong and weak activator group, only the strong activator guides the electrophile towards ortho or para to the that activator group.
An illustration of an electrophileBecause they lack an electron, electrophiles can receive a pair of electrons from organisms that have an abundance of them. Examples include carbonyl compounds and carbocations. A nucleophile is a species that has an abundance of electrons and gives electron pairs to species that lack electrons. Carbanions, water, ammonia, cyanide ions, and others are examples.
What part does the electrophile play?A chemical species known as an electrophile in chemistry accepts an electron pair from nucleophiles to form bonds with them. Electrophiles are Lewis acids because they are electron-accepting molecules.
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1. Identify each of the following as a measurements of length,area, volume, mass, density, time or temperature:
a)ns
b)10.0 kg/m3
c) 1.2 pm
d)750 km2
e) 83 K
f) 4.0 mm3
2. Carry out the following operations, and express the answerwith the appropriate number of significant figures and units:
a) (5.231 mm)(6.1 mm)
b) 72.3 g/1.5 mL
c) 12.21 g + 0.0132 g
d) 31.03 g + 12 mg
3. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person.
4. A man who is 5 ft. 8 in. tall weighs 160 lb. What is hisheight in centimeters and his mass in kilograms.
In the same way, as the U.S. customary system employs feet, quarts, and ounces to measure these things, the metric system measures length, liquid volume, and mass in units like meter, liter, and gram.
The metric system uses kilograms or grams to measure mass, meters or kilometers to measure distance, and liters to measure volume. Time doesn't have any quantifiable physical qualities. The length of time between two events is what we are actually counting. People have used a variety of methods throughout history to keep track of the passage of time, including sunrise and sunset times and moon phases. Volume, which is measured in cubic units, is the area in three dimensions that matter occupies or that is encircled by a surface. The cubic meter (m3), a derivation of the SI unit of volume.
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What are the (3) most commonly used chemical sanitizers and their PPM?
bleach) containing 50 to 100 micrograms (ppm) of chlorine. The most common sanitizers on the market contain chlorine. the quaternary ammonium (QUAT, QAC) Maintaining concentration: as instructed by the manufacturer. Iodine. Concentration ranges from 12.5 to 25 ppm.
What disinfectants spring to mind?The three main chemical substances that are used as sanitizers in the food service industry are iodine sanitizers, chlorine-based cleansers, and cleaners. The most used molecular sanitizing agent is chlorine since it is both very effective and inexpensive.
Is rubbing alcohol a sanitizer?It may successfully eradicate a variety of pathogens, including bacteria, hepatitis, and fungi, due to its effectiveness as a germicide. Rubing alcohol can be used as a household cleaner, but it is widely employed in medical settings to clean hands.
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Calculate the number of H atoms in 0.532 mol C4H10. Na = 6.022 x 1023.
O 8.83 x 10-24 H atoms
O 3.20 x 1023 H atoms
O 8.83 x 10-25 H atoms
O 1.13 x 1024 H atoms
O 3.20 x 1024 Hatoms
3.20 x 1024 H atoms, which were produced after the Big Big 13.7 billion years ago, are contained in 0.532 mol of C4H10, the smallest known unit of mass.
How are atoms made?Atomic structure: composition The atom is made up of a small nucleus that is encircled by circling electrons. Protons, which are found in the nucleus and have positive charges comparable to the atom negative charges, are present. Neutrons, which are almost the same size but lack a charge, might also be found in the nucleus.
What are the 3 different types of atoms?Protons, electrons, and neutrons are the 3 main types of particles found in atoms. In contrast, the mass of the electron is extremely little compared to that of neutrons and protons. A neutron has had no charge, a proton has a positive charge, and an electron has a negative charge.
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