Question

50 point help me solve also not only answer ​

Answer 1

Please mark as brainliest

B) 3x10^23

mass of molecule of water is 18 grams per mole.

$\frac{18}{6.022} \times {10}^{23} = 3 \times {10}^{23}$

Answer 2

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

$\bold\red{ 1)3 \times {10}^{ - 23} kg}$

$\bold\red{2)2.4 NA ions }$

$\huge\sf{solution:}$

1 Mole of water has $\bold{ 6.022 \times {10}^{23} }$ molecules.

$\bold{ 6.022 \times {10}^{23} }$ molecules of water weigh 18 g.

1 molecules of water weigh =

$\bold{</strong><strong>\frac{18}{6.022 \times {10}^{23} } \times 1</strong><strong>}$kg

$\implies$ $\bold{</strong><strong>3 \times {10}^{ - 23} kg</strong><strong> }$

Ans :- 2

14 g of Nittride ion $\bold{6.022 \times {10}^{23}}$ or NA ions

4.2 g of Nitride ion has $\bold{\frac{NA}{14} \times 4.2 }$

$\implies$ $\bold{0.3 NA }$ ions

1 atom of nitride ion has 8 valence electrons

$\implies$ $\bold{0.3 NA of nitride ion has = 8 × 0.3 Na ions}$

$\implies$ $\bold{2.4 NA}$ Nitride ions