What is the mass of 187 liters of CO2 gas? The volume is measured at STP.
1 answer:
The mass of 187 liters of CO2 gas is 0.36 g.
<u>Explanation:</u>
The molecular weight of CO2 is 44 g / mol.
1 kg of CO2 = 1000 g ( 1 mole / 44 g) = 22.7 mole of CO2.
By using the ideal gas equation,
PV = nRT
V = nRT / P
where P represents the pressure,
V represents the volume,
T represents the temperature,
R represents the ideal gas constant,
n represents the amount of substance.
V = (22.7)(0.0821)
(273.15) / 1
V = 509.6 L of CO2 at STP
Mass = (187 L of CO2 gas) / (509.6 L of CO2 at STP)
= 187 / 509.6
mass = 0.36 g
You might be interested in
Answer: 1. 2.7 moles of ammonia are formed
2. 12.0 moles of hydrogen are required
3. 2.0 moles of nitrogen are required
Explanation:
The balanced chemical equation is:
According to stoichiometry:
3 moles of hydrogen form = 2 moles of ammonia
Thus 4.0 moles of hydrogen form = of ammonia
According to stoichiometry:
2 moles of ammonia are formed by = 3 moles of hydrogen
Thus 8.0 moles of ammonia are formed by = of hydrogen
According to stoichiometry:
3 moles of hydrogen react with = 1 mole of nitrogen
Thus 6.0 moles of hydrogen react with = of nitrogen
Answer:
The wavelength the student should use is 700 nm.
Explanation:
Attached below you can find the diagram I found for this question elsewhere.
Because the idea is to minimize the interference of the Co⁺²(aq) species, we should <u>choose a wavelength in which its absorbance is minimum</u>.
At 400 nm Co⁺²(aq) shows no absorbance, however neither does Cu⁺²(aq). While at 700 nm Co⁺²(aq) shows no absorbance and Cu⁺²(aq) does.
