Using Avogadro's Number

Practice Questions

High School Chemistry › Using Avogadro's Number

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1

How many moles of carbon are in a sample of $25.125*10^{27}$ atoms?

2

What is the mass of $5.34\times10^{15}$ particles of $C_2H_6$ ?

3

A container has $4.33\times 10^{24}$ molecules of gas in it. How many moles of the gas are in the container?

4

How many atoms are in $\small 50g$ of calcium?

5

Determine the number of sodium atoms in a block of sodium chloride.

6

How many hydrogen atoms are present in 500 mL of water at room temperature?

$\rho_{\text{water}}=1\frac{g}{mL}$

7

How many atoms are there in 47.5g of boron?

8

How many atoms of sodium are in three moles of $Na_{2}S$ ?

9

How many molecules are in ?

10

A chemist has $4.37*10^{-3}g$ of $CH_3CH_2OH$ .

How many molecules of $CH_3CH_2OH$ does she have?

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