A 220.0 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310 K. What is the new
pressure of the sample?
274 kPa
216 kPa
Piston
243 kPa
51.1 kPa

A 220.0 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The pi

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Ответ:

dayanara72

01.07.2021

Chemistry

The limiting reagent : HCl

Further explanation

Given

Mg + 2HCI - MgCl₂ + H₂

2.5 mol of Mg and 4.0 mol of HCl

Required

the limiting reagent

Solution

A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients

mol ratio Mg : HCl =

$\tt \dfrac{2.5}{1}\div \dfrac{4}{2}=2.5\div 2$

HCl as a limiting reagent(smaller ratio)

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A 220.0 mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310 K. What is the new pressure of the sample? 274 kPa 216 kPa Piston 243 kPa 51.1 kPa