(Q20) A balloon is filled to a volume of 774 mL with 555 milligrams of helium gas. Some of the helium gas is removed until the volume of the balloon is 263 mL. What is the total mass of helium (in mg) that remains in the balloon? (3 sf)

(Q20) A balloon is filled to a volume of 774 mL with 555 milligrams of helium gas. Some of the helium gas is removed until the volume of the balloon is 263 mL. What is the total mass of helium (in mg) that remains in the balloon? (3 sf)

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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(Q20) A balloon is filled to a volume of 774 mL with 555 milligrams of helium gas. Some of the
helium
gas
is removed until the volume of the balloon is 263 mL. What is the total mass of helium
(in mg) that remains in the balloon? (3 sf)

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Answer by using values from table please
A heated lead ball is added to 158 grams of water in a coffee cup calorimeter. If the ball loses 47.35 °C of heat and the water gains 1.3 °C of heat, what is the mass of the lead ball? (3 sf)