We can use the ideal gas law equation to find the number of moles;
PV = nRT
where P - pressure
V - volume - 56.2 x 10⁻³ m³
n - number of moles
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature
standard temperature is 273 K
and standard pressure - 101 325 Pa
we can rearrange the equation to find the number of moles
substituting the values in the equation
n = 2.51 mol
molar mass of Ar - 40 g/mol
mass of Ar in the sample - 2.51 mol x 40 g/mol = 100.4 g
Although I’m not entirely sure what answer you’re looking for, I’d say because most scientific investigations require multiple trials of an experiment
The most important variable to control in this experiment the type of bicycle tyre.
<h3>What is an experiment?</h3>
An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.
According to this question, Dan and Dawn wants to know if there is any difference between the mileage expected from bicycle tires from two different manufacturers.
Dan, then, conduct an experiment by putting one brand on his bike and Dawn will put the other brand on her bike.
In this experiment, the independent variable is the different mileage from different manufacturers. This means that to make this experiment a controlled one, all other variables must be kept constant.
Therefore, the most important variable to control in this experiment the type of bicycle tyre because Dan and Dawn must ensure that they use the same type of bicycle tyre.
Learn more about experiments at: brainly.com/question/11256472
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The number of H atoms in 3(NH₄)₂CrO₄ = 24
<h3>Further explanation </h3>
The empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
(empirical formula) n = molecular formula
Subscripts in the chemical formula indicate the number of atoms
The compound of 3(NH₄)₂CrO₄ ( 3 molecules of (NH₄)₂CrO₄ ) :
Number of H :
Answer:
The answer to your question is volume = 358.4 L
Explanation:
Data
volume of CO₂ = ?
moles of O₂ = 8
moles of CO = excess
Balanced chemical reaction
2 CO + O₂ ⇒ 2 CO₂
Process
1.- Calculate the moles of CO₂
1 mol of O₂ ------------------ 2 moles of CO₂
8 moles of O₂ -------------- x
x = (8 x 2) / 1
x = 16 moles of CO₂
2.- Calculate the volume of CO₂
1 mol of CO₂ ----------------- 22.4 L
16 moles of CO₂ ------------ x
x = (16 x 22.4) / 1
x = 358.4 L