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Gnom [1K]
3 years ago
8

How many milliliters of calcium with a density of 1.55 g/mL are needed to produce 12.4 g of hydrogen gas in the single replaceme

nt reaction below be sure to show the work that you did to solve the problem and balanced equation Ca + HF -> CaF2 + H2
Chemistry
1 answer:
timurjin [86]3 years ago
3 0

Answer:

Help

Explanation:

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First calculate for number of moles:

moles Ag = 12 g / (107.87 g / mol)

moles Ag = 0.111 mol

 

Convert to atoms using Avogadros number:

atoms Ag = 0.111 mol * (6.022 x 10^23 atoms / mol)

atoms Ag = 6.7 x 10^22 atoms

 

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Number of electrons = (6.7 x 10^22 atoms) * (47 electrons / atom)

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Answer:

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