Question

mass of 1×10^23 atoms of CO2..​

Answer 1

$\huge\text{\underline{Answer}}$

1 mole of carbon contain $\bold{6.022 \times {10}^{23} }$

Now,

$\bold{ 6.022 \times {10}^{23} }$g of carbon weight 12 g

$\bold{1 \times {10}^{23} g of carbon weight }$

$\implies$ $\bold{\frac{12}{6.022 \times {10}^{23} } \times 1.0 \times {10}^{23} }$

$\implies$ $\bold{ \frac{12}{6.022} }$

$\implies$ $\bold{1.99 or 2 g}$

hence, weight of carbon is 2 g.