4. How many moles are in 54.0 grams of Silver?

1 answer:

7 0

4. Molar mass of silver m Ms~=108 g/mol
Hence there are n=54*(1/108)=0.5 mols of Silver in 54 grams of Silver.

5. 6.3*(108/1)=680.4g

6. Avogadro's number : Na~=6.022×10^23<span>. </span>
6.0*(6.022*10^23/1)=36.132*10^23 atoms

7. Molar mass of Krypton : Mk=84 g/mol
112/84=1.33 moles of Kr

8. 1.93*10^24*(1/(6.022×10^23))=3.2 moles KF

9. Molar mass of Silicon : Ms=28 g/mol
86.2*(1/28)*(6.022×10^23/1)=18.5*10^23 atoms of silicon

10. Molar mass of Magnesium : M1=24 g/mol
4.8*10^24*(1/(6.022×10^23))*(24/1)=191 g Mg

You might be interested in

If molar mass of M(OH)3 = 78 8. mass of M

Cerrena [4.2K]

Answer:

From molar mass=total RAM of each individual element

78.8=(16+1)×3+M

78.8-51=M

27.8g/mol=M

5 0

2 years ago

When a solid has energy added and turns to a liquid what is it called?

Phoenix [80]

Melting (solid to liquid)

4 0

2 years ago

A change from one state of matter to another involves the transfer of

Alja [10]

A heat because heat is the transfer of energy.

5 0

2 years ago

Read 2 more answers

Question 12(Multiple Choice Worth 1 points) (02.03 HC) Kim heated 12 g of Substance A to obtain 4 g of Substance B and a certain

Dovator [93]

the mass of substance c is twice of substance b. we know this through the law of conservation, so 12 > 4 + _, so substance C is 8, which is twice B

7 0

3 years ago

Read 2 more answers

In the following list, only ________ is not an example of a chemical reaction. the production of hydrogen gas from water the tar

Vika [28.1K]

Answer: Option (c) is the correct answer.

Explanation:

A chemical reaction is defined as the reaction where a chemical bond will break in order to form a new bond due to the formation of a new substance.

For example, $2Na + Cl_{2} \rightarrow 2NaCl$

Here, NaCl is the new substance that is formed. A chemical reaction will always bring change in chemical composition of a substance.

The production of hydrogen gas from water, the tarnishing of a copper penny, charging a cellular phone and burning a plastic water bottle are all chemical reactions.

Whereas a reaction where no change in chemical composition of a substance takes place is known as a physical reaction.

For example, chopping a log into sawdust will change the shape but it will not bring any change in chemical composition of the substance.

Thus, we can conclude that in the following list, only chopping a log into sawdust is not an example of a chemical reaction.

8 0

2 years ago