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Semenov [28]
3 years ago
9

A sample of nitrogen gas contains 9.46x10^23 atoms of nitrogen. How much nitrogen is expressed in grams? round your answer to th

e nearest whole number.
Chemistry
1 answer:
Alexxx [7]3 years ago
6 0
  • No of. atoms=9.46×10^23

We know

\boxed{\star{\sf No\;of\:atoms=No\:of\: moles\times Avagadro's\: number}}

\\ \rm\Rrightarrow No\:of\;moles=\dfrac{No\:of\:atoms}{Avagadro's\:no}

\\ \rm\Rrightarrow No\:of\:moles =\dfrac{9.46\times 10^{23}}{6.022\times 10^{23}}

\\ \rm\Rrightarrow No\:of\:moles=1.6mol

Again

\boxed{\star{\sf Mass=Molar\:mass\times No\:of\:moles}}

\\ \rm\Rrightarrow Mass=1.6(14)

\\ \rm\Rrightarrow Mass=22.4g

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Calculate the number of moles of solute in 16.55 mL of 0.1475 M M2Cr3O7
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<u>Explanation:</u>

The properties and behavior of many solutions depend not only on the nature of the solute and solvent but also on the concentration of the solute in the solution. Molarity (M) is the concentration of a solution expressed as the number of moles of solute per liter of solution:

Molarity = \frac{moles-solute}{lites-solution},

Here , litres-solution = \frac{16.55}{1000} l = 0.01655l.

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