What is the volume of 2.1 moles of nitrogen gas at standard temperature and pressure (stp)?

47.04 L will be the volume occupied by the 2.1 moles of nitrogen gas at STP.

Explanation:

At STP,

1 mol of ideal gas occupies = 22.4 L

Considering nitrogen gas to be an ideal gas

Then 2.1 moles of the nitrogen gas will occupy:

47.04 L will be the volume occupied by the 2.1 moles of nitrogen gas at STP.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e