Question

The ratio between the no.of molecules in 2g of hydrogen and 32g of oxygen is
A)1:2
B)1:0.01
C)1:1
D)0.01:1

Answer 1

Answer:1:1

Explanation:

Both have same moles so they must have same no of molecules ( according to avagadro).

:-)

Answer 2

Ratio of number of molecules of given amount of hydrogen and oxygen is 1 : 1

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$      .....(1)

• For hydrogen gas:

Given mass of hydrogen gas = 2 g

Molar mass of hydrogen gas = 2 g/mol

Putting values in equation 1, we get:

$\text{Moles of hydrogen gas}=\frac{2g}{2g/mol}=1mol$

• For oxygen gas:

Given mass of oxygen gas = 32 g

Molar mass of oxygen gas = 32 g/mol

Putting values in equation 1, we get:

$\text{Moles of oxygen gas}=\frac{32g}{32g/mol}=1mol$

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules

So, 1 mole of hydrogen gas will contain $(1\times 6.022\times 10^{23})=6.022\times 10^{23}$ number of molecules

1 mole of oxygen gas will contain $(1\times 6.022\times 10^{23})=6.022\times 10^{23}$ number of molecules

Taking the ratio of number of molecules:

$\frac{n_{H_2}}{n_{O_2}}=\frac{6.022\times 10^{23}}{6.022\times 10^{23}}\\\\\frac{n_{H_2}}{n_{O_2}}=\frac{1}{1}$

Learn more about number of molecules:

https://brainly.com/question/13582026

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