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3 years ago

How many molecules are in 12.5g of water (H2O)? Molar mass Help asap

Chemistry

2 answers:

ira [324]3 years ago

7 0

Answer:

Explanation:

18.01528 g/mol. I googled this, but it would be 16 for O plus 2 for the 2 H's. 18 g/mol divided by 12.5g=1.44 mol of H20.

1.44mol* $6.02*10x^{23}$ molecules/mol= 8.6688*10^23.

Sindrei [870]3 years ago

4 0

The answer is 18.015 i think

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<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

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$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}$

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$\tt \dfrac{1}{16}=\dfrac{1}{2}^{(48/t\frac{1}{2} )}\\\\(\dfrac{1}{2})^4=(\dfrac{1}{2})^{48/t\frac{1}{2}}\\\\4=48/t\frac{1}{2}\\\\t\frac{1}{2}=12~hr$

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