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vfiekz [6]
3 years ago
7

Matter and energy may be created or destroyed in a chemical reaction.

Chemistry
1 answer:
gulaghasi [49]3 years ago
3 0

Answer:false

Explanation:matter cannot be created or destroyed in a chemical reaction it is rearranged

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13.8g element consist 4.6 ×10^22 atoms what is atomic mass of element?​
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<h2>~<u>Solution</u> :-</h2>
  • Here, to find the atomic mass of element, we must;

We know that,

  • 4.6 x $ \sf{10^{22}}$ atoms of an element weigh 13.8g.

Thus,

The atoms of $ \sf{ 6.02 \times 10^{13}}$ will weigh;

=   \sf{\frac{13.8  \times 6.02 \times  {10}^{23} }{4.6 \times {10}^{22} } } \\

=  \sf{180.6 \: g \:  \: (molar \: mass)}

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