What is used to calculate average atomic mass of an element?

If I have 25 mL of gas at a pressure of 2.1 atm and a temperature of 300 K, what will the pressure be if I increase the temperature to 400 K and compress the gas to a volume of 10 mL?

What do we call conditions in an experiment that are in the same for all groups

A coal-fired power plant emitshot gases at a rate of 50 ft3/sec. The hot gas contains flyash, which is emitted at a rate of 120 lb of flyash per hour. What is the concentration of flyash in micrograms per cubic meter?

Which clue can be used to identify a chemical reaction as a combustion reaction? Oxygen is a product. A hydrocarbon reacts with oxygen. Water and carbon dioxide react. The reaction involves ions.

The production of bread and beer both use the process of fermentation. Why do you not get drunk from eating bread like you would from drinking beer?

What is at mass no of potassium

According to the modern atomic theory, are atoms divisible?

Running a mile involves

How many calories are there in a 255 Food Calorie snack bar? a. 1 x 103 b. 2.55 x 105 c. 1.07 x 103 d. 60.9 e. none of the above

What is the greatest amount of ammonia (NH3) in moles that can be made with 4.7 mol N2 and 6.9 mol H2? Which reactant is limiting? How many moles of excess reactant will be left after the reaction?