Calculate the number of moles in the 2.1-L volume of air in the lungs of the average person. Note that the air is at 37.0ºC (body temperature). Use standard atmospheric pressure.

What volume of a 1.3 M solution of Na2CO3 can be made from 800 ml. of a 4.9 molar solution of this solute?

A phase diagram shows phase changes of a substance by illustrating which of the following? A. pressure vs. time B. pressure vs. density C. temperature vs. time D. pressure vs. temperature

5. The strength of a gravitational force between two objects depends on A. Push and pull. B. Mass and volume. C. Mass and distance. D. Strength and direction.

If the molecular mass of the potassium and oxygen compound in ex. 31 is 94 g/mol, what is the molecular formula for this compound?

Why did scientists who study weather need more advanced technology? Check all that apply. to anticipate changes in weather patterns to forecast weather several days in advance to predict weather changes around the world to monitor weather events

Mass_mole relationship

What is the momentum of an 800-kg car | traveling at a velocity of 10 m/s? What is its momentum if it speeds up to 50 m/s?

How many grams of CuSO4 are there in 100.0 g of hydrate? How many moles?

Which student is determining the atomic mass of sodium?

Ionic compounds can conduct electricity when dissolved in water or melted, because a. the ions are free to move. b. they have no ions to contribute to the solution. c. the ions are fixed in place. d. they have shared electrons.