b. What useful functions do oxidation numbers
serve?
20.
b. How many molecules are in 1 mole of
molecules?
c. What is the name given to the number of
molecules in 1 mole?
21. a. What is the molar mass of an element?
b. Write the molar mass rounded to two
decimal places of carbon, neon, iron and
uranium.

Answers

Answer 1

Explanation:

b. What useful functions do oxidation numbers  serve?

It is used to show oxidation and reduction (loss and gain of electrons)

b. How many molecules are in 1 mole of  molecules?

1 mole = 6.022 * 10^23 molecules

c. What is the name given to the number of  molecules in 1 mole?

Avogadro's Number of molecules

21. a. What is the molar mass of an element?

This is the mass of an element divided by the number of moles.

Molar mass = Mass / Number of moles

b. Write the molar mass rounded to two  decimal places of carbon, neon, iron and  uranium.

amu = Atomic Mass Unit

Carbon = 12.01 amu

Neon = 20.18 amu

Iron = 55.85 amu

Uranium = 238.03 amu


Related Questions

Pleaseeee someoneee helppp meee

Answers

Answer:

provisioning

Explanation:

this is a product obtained from an ecosystem which would be provision.

In a chemical reaction*
1 point
The atoms of the reactants unbond, rearrange, and then rebond to form the products
Some atoms disappear while others multiply to form the products
The atoms of the reactants always stay together to form the products
New atoms are formed which combine to make the products

Answers

Answer:

1st one is correct

The atom of the reactants unbound , rearrange, and then rebond to form the product

hope it helps

In a chemical reaction, the atoms of the reactants unbond, rearrange, and then rebond to form the products. Therefore, option A is correct.

What is chemical reaction ?

Chemical reaction, the transformation of one or more chemicals the reactants into one or more distinct compounds, the products. Chemical elements or chemical compounds make up substances.

Combustion reaction, decomposition reaction, neutralization reaction, redox reaction, precipitation or double-displacement reaction, and synthesis reaction are some of the numerous types of reactions.

In a chemical reaction, bonds between molecules of the reactant are broken and new bonds between molecules of the product are established to create a new substance.

A chemical equation is nothing more than a mathematical statement that represents how reactants form products.

Thus, option A is correct.

To learn more about chemical reaction, follow the link;

https://brainly.com/question/3461108

#SPJ2

Why does a basketball deflate when left outside overnight?

Answers

Answer:

I hope it's help uu

if wrong then sry

Does anyone knows how to solve this??

Answers

Answer:

²⁴³₉₅Am --> ²³⁹₉₃Np  +  ⁴₂He

Explanation:

In alpha decay;

The mass number decreases by 4

Atomic Number decreases by 2

Mass Number = 243 - 4 = 239

Atomic Number = 95 - 2 =93

Element = Neptunium (Np)

Equation for the decay is given as;

²⁴³₉₅Am --> ²³⁹₉₃Np  +  ⁴₂He

Is the bond C=O polar or non polar

Answers

Answer:

Non Polar

Explanation:

Non Polar molecule because of its linear symmetric shape

White arctic hares blending in with the white snow in their environment is an example of what type of camouflage?
A. hiding
B. protective resemblance
C. mimicry
D. protective coloration

Answers

Answer:

The answer to your question is A.

D. Protective coloration.  Protective coloration, also known as "crypsis," is a defense mechanism used by animals to avoid detection by predators or prey.

An illustration of protective coloration, which is a sort of camouflage, is how white arctic hares blend in with the white snow around them. Animals use protective coloration, commonly referred to as "crypsis," as a defensive strategy to evade being seen by predators or prey.

In this instance, the white arctic hares' fur is the same shade as that of their snowy environment. Their chances of survival are increased by this merging, which enables them to remain unnoticed and effectively hidden from predators like polar foxes or birds of prey. They have a better chance of escaping or avoiding detection when they are well-camouflaged, making it difficult for predators to see them against the white background.

To know more about arctic:

https://brainly.com/question/15301454

#SPJ2

need help balancing these ​

Answers

the answer would be 1,3,1,3

Answer:

The answers are 1:3:13

Explanation:

when I had to do these types of equations just search them up on you-tube lol theres this guy called Wayne Breslyn that does a really good job of explaining and has like the answers for any and everyy balancing equation

When a new substance has formed, has a physical or chemical) change occurred?
(4 Points)

A) chemical

B) physical

Answers

Answer: A) Chemical Change

Explanation:

A chemical change create a NEW type of matter that CANNOT be reversed!

Example: Spolied milk

Example: Green tomatoe turns red

Hope it’s helpful! :)

Please help with this question

Answers

THE ANSWER IS c:0%

HOPE IT MAY HELPS YOU

what makes sherbet fizzy​

Answers

Answer:

The chemical reaction between the citric acid and sodium bicarbonate

Explanation:

The equation for the complete combustion of ethene (C 2 H 4 ) is C 2 H 4 + 3O 2 2CO 2 + 2H 2 O If 2.70 mol of C 2 H 4 reacted with 6.30 mol , O 2 a. Identify the limiting reagent. b. Calculate the moles of water produced .

Answers

Answer:

22

Explanation:

Which condition would cause an increase in the salinity of ocean water?


thawing of glaciers


high rates of evaporation


cold weather


a river flowing into the sea

Answers

high rates of evaporation

Answer:

high rates of evaporation

If the atomic number of an element is 8 and the mass number is 16, the number of neutrons in an atom of that element is what? (show work)

Answers

Answer:

8.

Explanation:

Atomic number tells us the number of protons in an element. Mass number is the total amount of mass in an atom, and it comes from the sum of the mass of protons and neutrons, which are both considered to have a mass of 1 amu.

If the total mass is 16amu and 8amu comes from the 8 protons, the remaining mass comes from neutrons.

16 - 8 = 8

why is respiration considered an exothermic process​

Answers

Answer:

Respiration is considered as exothermic reaction because energy is released in this process. Glucose combines with oxygen present in our cells to form carbon dioxide and water along with energy.

Explanation:

Good Luck!

Respiration is considered as an exothermic reaction because, in the respiration process, oxidation of glucose takes place which produces a large amount of heat energy stored in the form of ATP. This is shown in the following chemical equation C 6

Severe storms all have extremely strong winds that can cause a lot of environmental damage.

Which storm below has the strongest winds?

Answers

The most intense winds in a tornado can exceed 300 miles per hour.
i would say tornados also!

Why are scientists worried that climate change will cause these toxic algae blooms to become more frequent?

Answers

Answer:

I would assume it would kill marine life and or a shift in the climate may possibly create a better environment for the algae to grow Don't quote me on that though I couldn't tell you

Answer:

It may kill marine life and or a shift in the climate might make better growth of algae possible.

2
The current temperature, wind, precipitation and
other atmospheric conditions at any given time describes what?
A Controls
B Climate
C Tropics
D Weather

Answers

The answer is D.......

Which of the following pairs of groups of elements cannot form ionic bond? *


IA & VIIA
IA & VA
VIIA & VIIIA
IIA & VIA

Answers

Answer:

pq ning kamot oi

Explanation:

hahahsfdydn ebejkakbabaha

What type of reaction is shown here?
C3H2O + 4023 CO2 + 3 H2O

Answers

Answer: combustion and girl

Explanation: C3H6O + 4 O2 → 3 CO2 + 3 H2O COMBUSTION

Do all mutations have the same affect on a cells dna

Answers

Answer:

no, some mutations can create cancers while others can create other infections

Explanation:

No, some mutation alter a gene’s DNA sequence but do not change the function of the protein made by the gene. Most mutation do not have an impact on health of cells DNA.

A rectangular poster is /4 yard wide and / yard tall. What is its area? Solve this problem any way you choose

Answers

Answer:

Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²

Explanation:

P.S - The exact question is -

Given - A rectangular poster is [tex]\frac{1}{4}[/tex] yard wide and [tex]\frac{3}{4}[/tex] yard tall.

To find - What is its area ?

Proof -

We know that ,

The area of rectangle = Length × Breadth

Here,

Given that,

Length of rectangle = [tex]\frac{3}{4}[/tex] yard

Breadth of rectangle = [tex]\frac{1}{4}[/tex] yard

∴ we get

Area of rectangular poster = [tex]\frac{3}{4}[/tex] × [tex]\frac{1}{4}[/tex]  yard²

                                          = [tex]\frac{3}{16}[/tex] yard²

⇒Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²

Which condition would have resulted from the functions of prokaryotes on early Earth?

Question 2 options:

Earth's oceans grew larger


less oxygen gas became present in the atmosphere


less carbon became present in Earth's soil


more oxygen gas became present in the atmosphere

Answers

the 1 one and the last one

Which of the following processes is involved in the formation of sedimentary rocks?
O metamorphism
O cooling
O subduction
O deposition

Answers

Answer:

deposition

Explanation:

D. deposition

hope i can help

A reaction that proceeds more slowly than
another reaction has a
(2 words)
______________

Answers

Answer: Less energy.

(Science) Help Please!

Answers

Answer:

product

Explanation:

It is the right answer.

Mixing salt with sugar is a chemical change true or false?

Answers

Answer:

False unless you add something else with the like the common sugar ice and salt science project.

Explanation:

Answer:

No

Explanation:

No, mixing salt and sugar is not a chemical reaction. Chemical reactions result in the change of chemical composition of one or more substances(it is no longer able to be turned back to normal

Which om sled below is amplo dl an abelis laeler in an evünment?
ban
B. droganty
C. ar temperatura
D. cation

Answers

Answer:

Explanation:

i got D

It’s D!
Hope this helped, please make me brainliest if it was useful! Have a good day/night

Helpp me pretty please

Answers

Im pretty sure the answer is distance and mass
Answer : distance and mass !

Which type of reaction occurs in the following?

2HgO(s) Right arrow. 2Hg(l) + O2(g)
a decomposition reaction in which a metal is reduced
an acid-base neutralization reaction to produce oxygen gas
a displacement reaction involving two metals
a combustion reaction involving burning a metal in oxygen

Answers

Answer:

decomposition

Explanation:

the reactants turn into two different products, thus the reaction is decomposition.

AB -> A + B

Answer:

A: a decomposition reaction in which a metal is reduced

Explanation:

HgO is actually the metal Mercury and in the equation Mercury is being decomposed into the elements Hg and O. (the element for Mercury and Oxygen) So the equation they give you is a decomposition.

Which process occurs when a gas turns into a liquid?

Answers

Answer:

Condensation

Explanation:

Other Questions
How did entertainment in Ancient Rome lead to its fall? Will give brainiest to correct answer40x + 45 What was Billy's reaction when he saw the seaman? What did he call the seaman? Find the equation of the line parallel to y=6 that contains the point (-1,1). Write the equation in slope intercept form hello help please ill mark brainliest!!! thankss Need help bad I need someone to fix these sentences and add anything that will make it correct Im rewarding points + brainalist please help a brother out (: As rain seeps into the soil and becomes groundwater, it can travel into the saturated zone and become part of A. the ocean.B. a pond.C. an aquifer.D. surface runoff. help help help help help help help help x=a+b+4 and a is inversely proportional to y; b is inverseley propotional to 1/y. when y = 2 x = 18 and when y = 1 x = -3. find x when y = 4 PLS HELP ME FIND MEASURE AED One way that the Texas Constitution and the U.S Constitution are similar is that both established a government divided into Match these items. Match the items in the left column to the items in the right column.1. normal for Christians Christian faith 2. the result of growth in Christ temptation 3. that our minds be renewed and we become more like Christ the devil 4. a system of relationships, ideas, and values opposed to the Kingdom of God maturity 5. overcomes the world the Bible 6. resides in the mind and intellect the flesh 7. hates God and his people service 8. main way that Satan causes problems the world 9. most important key to growth in Christ fellowship 10. God does not want us to neglect this key to growth in Christ prayer 11. "washing the feet" of others growth 12. especially important to study God's desire So this one may be really hard. How did Germany Punish the Treaty of Versailles? (write 5 ways Germany was punished) Kacey is making a bracelet that is 8 inches long. She uses 1 green bead at each end of the bracelet. She also uses 1 green bead every 2 inchesbetween the two ends. How many green beads does she use?A. 16B. 7C.5D.4 what is the arc of a semicircle with a diameter of 8? What role is the governor fulfilling when he calls the Virginia NationalGuard to respond to flooded areas?A Chief of stateB Commander-in-chiefC Chief legislatorD chief of party Who was involved in battle of Jutland which was the only animal indigenous to the Americas? helpppppppppppppppppppppppp i need an answer Anyone help please more & you get extra points