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abruzzese [7]
3 years ago
14

6.626 × 10⁻³⁴ × 7.08× 10¹⁴

Chemistry
1 answer:
PolarNik [594]3 years ago
3 0

The answer is 4.69 x 10⁻¹⁹  I hope this helped!

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The balanced equation is:

2 HNO3 + Mg ---> Mg(NO3)2 + H2

From the equation, we can see that we need twice the moles of HNO3 than the moles of Mg

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Molar mass of Mg = 24 g/mol

Moles = Given mass / Molar Mass

Moles of Mg = 4.47 / 24 = 0.18 moles (approx)

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Number of moles of HNO3 after the reaction is finished is the number of unreacted moles of HNO3

Unreacted moles of HNO3 = Total Moles - Moles consumed

Unreacted moles of HNO3 = 0.64 moles (approx)

Since we approximated the value of moles of Mg, the value of remaining moles of HNO3 will also be approximate

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