3 years ago

What is the mass in grams of 394 mL of ethylene glycol? Express your answer with the appropriate units.

Chemistry

1 answer:

AleksandrR [38]3 years ago

3 0

Answer : The mass of ethylene glycol is, 437.34 grams

Solution : Given,

Volume of ethylene glycol = 394 ml

Density of ethylene glycol = 1.11 g/ml (Standard value)

Formula used :

$Density=\frac{Mass}{Volume}$

Now put all the given values in this formula, we get the mass of ethylene glycol.

$1.11g/ml=\frac{Mass}{394ml}$

$Mass=437.34g$

Therefore, the mass of ethylene glycol is, 437.34 grams

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How many liters of carbon dioxide will be produced at STP if 3.56 g calcium carbonate reacts completely with carbon dioxide? CaC

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Answer:

V = 0.798 L

Explanation:

Hello there!

In this case, for this gas stoichiometry problem, we first need to compute the moles of carbon dioxide via stoichiometry and the molar mass of starting calcium carbonate:

$3.56gCaCO_3*\frac{1molCaCO_3}{100gCaCO_3} *\frac{1molCO_2}{1molCaCO_3} =0.0356molCO_2$

Next, we use the ideal gas equation for computing the volume, by bearing to mind that the STP conditions stand for a pressure of 1 atm and a temperature of 273.15 K:

$PV=nRT\\\\V=\frac{nRT}{P}\\\\V=\frac{0.0356mol*0.08206\frac{atm*L}{mol*K}*273.15K}{1atm} \\\\V=0.798L$