Neco Model Questions Vol1 2022 Chemistry Question 49

Practice objective / multiple choice question 49 from the 2022 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2022 Chemistry Objective / Multiple Choice Medium Difficulty
Question 49 NECO_MODEL_QUESTIONS_VOL1 • 2022 • CHEMISTRY • objective
Neco Model Questions Vol1 2022 Chemistry Question 49 diagram

In the laboratory apparatus shown, a 250.0\,mL eudiometer tube is inverted over water at 25\,°C. The water vapor pressure at this temperature is 23.8\,mmHg. The tube collects gas produced from the reaction of excess solid Na₂CO₃ with 0.0500\,mol of HCl in a sealed flask. The gas collected is CO₂. (a) Determine the partial pressure of dry CO₂. (b) Calculate the number of moles of CO₂ collected. (c) Find the mass of Na₂CO₃ that actually reacted.

Answer Options

Correct Answer A. P_{CO₂}=0.969 atm; n_{CO₂}=0.00991 mol; mass Na₂CO₃=1.05 g
B. P_{CO₂}=0.845 atm; n_{CO₂}=0.00870 mol; mass Na₂CO₃=0.92 g
C. P_{CO₂}=0.912 atm; n_{CO₂}=0.00930 mol; mass Na₂CO₃=0.99 g
D. P_{CO₂}=1.020 atm; n_{CO₂}=0.0105 mol; mass Na₂CO₃=1.12 g
Correct Answer
A
Correct Option:
P_{CO₂}=0.969 atm; n_{CO₂}=0.00991 mol; mass Na₂CO₃=1.05 g

About This Question

This is Neco Model Questions Vol1 2022 Chemistry Question 49. It is one of the objective questions from the 2022 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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