Suppose you want to do an experiment to hear how three different objects with sound when dropped from the same distance. You drop a pebble, a rock, and a grain of sand. What are the variables of your experiment?

How many grams of HNO3 are produced when 59.0 g of NO2 completely reacts? Express your answer with the appropriate units.

What mass of hydrochloric acid is consumed by the reaction of 4.55 moles of calcium?

In order substance to go from a solid phase to a liquid phase, what must occur?

A client has been caring for an ailing mother for 18 months. In addition, the client has recently lost a job and is having difficulty finding a new one. Blood pressure has recently been running higher than normal.

How many moles of ammonium ions are in 1.3 grams of ammonium carbonate?

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum