Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the H₂ gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 36.2 mL. 8 g x²² collected x gas Sketch of a gas-collection apparatus Calculate the mass of H₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. water y chemical reaction

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced. Suppose the H₂ gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be 36.2 mL. 8 g x²² collected x gas Sketch of a gas-collection apparatus Calculate the mass of H₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the reaction conditions and the nature of the gases. water y chemical reaction

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter5: Gases

Section: Chapter Questions

Problem 5RQ

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it
easy to isolate and measure the amount of gas produced.
Suppose the H₂ gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an
apparatus something like that in the sketch, and the final volume of gas in the collection tube is measured to be
36.2 mL.
x10
X
y
Sketch of a gas-collection apparatus
Ś
collected
gas
Calculate the mass of H₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the
reaction conditions and the nature of the gases.
|| g
water
chemical
reaction

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Your answer is wrong. In addition to checking your math, check that you used the right data and DID NOT round any intermediate calculations.
Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it
easy to isolate and measure the amount of gas produced.
Suppose the H₂ gas evolved by a certain chemical reaction taking place at 50.0 °C is collected over water, using an
apparatus something like that in the sketch, and the final volume of gas in the collection tube measured to be
36.2 mL.
2.7 × 10
_3__8
g
Sketch of a gas-collection apparatus
Calculate the mass of H₂ that is in the collection tube. Round your answer to 2 significant digits. You can make any normal and reasonable assumption about the
react G onditions and the nature of the gases.
x10
X
collected
Ś
gas
water
chemical
reaction

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