Question

Which of the following pairs have the same number of atoms?
(A) 64 grams of O2(g) and 4 grams of H2(g) (B) 64 g of SO2(g) and 44 g of CO2(g)
(C) 28 g of N2(g) and 32 g of O2(g)
$0) 65 g of Zn(s) and 23 g of Na(s)
Which of the followine atatamantlaliolara incorrect?​

Answer 1

Answer:

All the options are correct.

Explanation:

(A) 64 grams of $O_2(g)$ and 4 grams of $H_2(g)$.

Moles of oxygen gas =$\frac{64 g}{32 g/mol}=2 mol$

Number of molecules oxygen in 2 moles:

$2\times 6.022\times 10^{23} molecules=1.02044\times 10^{24} molecules$

Number oxygen atoms =$2\times 1.02044\times 10^{24} molecules=2.04088\times 10^{24} molecules$

Moles of hydrogen gas=$\frac{4 g}{2 g/mol}=2 mol$

Number of molecules hydrogen in 2 moles:

$2\times 6.022\times 10^{23} molecules=1.02044\times 10^{24} molecules$

Number hydrogen atoms =$2\times 1.02044\times 10^{24} molecules=2.04088\times 10^{24} molecules$

Number of oxygen atoms = Number of hydrogen atoms

(B) 64 g of SO2(g) and 44 g of CO2(g)

Moles of $SO_2=\frac{64 g}{64 g/mol}=1 mol$

Number of molecules $SO_2$ in 1 moles:

$1\times 6.022\times 10^{23} molecules=6.022\times 10^{23}molecules$

Total number of atoms in $SO_2$ :

$3\times 6.022\times 10^{23}molecules=1.8066\times 10^{24} molecules$

Moles of $CO_2=\frac{44 g}{44 g/mol}=1 mol$

Number of molecules $CO_2$ in 1 moles:

$1\times 6.022\times 10^{23} molecules=6.022\times 10^{23}molecules$

Total number of atoms in $CO_2$ :

$3\times 6.022\times 10^{23}molecules=1.8066\times 10^{24} molecules$

Number of $SO_2$atoms = Number of $CO_2$ atoms

(C) 28 g of N2(g) and 32 g of O2(g)

Moles of nitrogen gas =$\frac{28 g}{28 g/mol}=1 mol$

Number of molecules nitrogen 1 moles:

$1\times 6.022\times 10^{23} molecules =6.022\times 10^{23} molecules$

Number nitrogen atoms =$2\times 6.022\times 10^{22} molecules=1.2044\times 10^{24} molecules$

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

Number of molecules oxygen in 1 moles:

$1\times 6.022\times 10^{23} molecules=6.022\times 10^{23} molecules$

Number oxygen atoms =$2\times 6.022\times 10^{22} molecules=1.2044\times 10^{24} molecules$

Number of nitrogen atoms = Number of oxygen atoms

D) 65 g of Zn(s) and 23 g of Na(s)

Moles of zinc =$\frac{65 g}{65 g/mol}=1 mol$

Number of molecules of zinc in 1 mole:

$1\times 6.022\times 10^{23} molecules=6.022\times 10^{23} molecules$

Number zinc atoms =$\times 6.022\times 10^{22} molecules=6.022\times 10^{23} molecules$

Moles of sodium=$\frac{23 g}{23 g/mol}=1 mol$

Number of molecules sodium in 1 mole:

$1\times 6.022\times 10^{23} molecules=6.022\times 10^{23} molecules$

Number sodium atoms =$\times 6.022\times 10^{22} molecules=6.022\times 10^{23} molecules$

Number of zinc atoms = Number of sodium atoms