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4 years ago

How many grams of calcium hydride are needed to form 4.550g of hydrogen gas

1 answer:

6 0

Molar mass:

CaH2 = 42.094 g/mol

H2 = 2.01 g/mol

CaH2 + 2 H2O = Ca(OH)2 + 2 H2

42.094 g ------------------------------ 2 x 2.01 g
?? ( mass of CaH2) --------------- 4.550 g

4.550 x 42.094 / 2 x 2.01 =

191.5277 / 4.02 => 47.64 g of CaH2

hope this helps!

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soldi70 [24.7K]

Answer:

Explanation:

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3 years ago

A 0.211 g sample of carbon dioxide, CO2, has a volume of 560 mL and a pressure of 429 mmHg whats the temperature of the gas in K

SCORPION-xisa [38]

The temperature of the gas sample is 813 K.

Explanation:

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$$T= \frac{PV}{nR}$

T = $$\frac{0.56 \times 0.56}{0.08205 \times 0.0047}$

= 813 K

So the temperature of the gas sample is 813 K.

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4 years ago

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Answer:solvent ; volume

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4 years ago

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