To describe the length of a classroom, a student should use

A) centigrams

B) centimeters

C) kilometers

D) meters

What has more thermal energy, 200 g of water at 40 degrees Celsius or 1000 g of water at 30 degrees Celsius

Which physical method can separate a mixture of steel ball bearings and marbles? a. boiling b. evaporation c. filtration d. sorting

Which of the following describes an exothermic reaction? O A. AHI, reactants = 0 O B. AHf, reactants = AHf, products O C. A He, reactants > AHf, products O D. A He, reactants < AH, products

Kerosene is mixed with 10 ft3 of ethyl alcohol so that the volume of the mixture in the tank becomes 14 ft3. Determine the specific weight and the specific gravity of the mixture.

Which for the following is considered a weak base? A. Lithium hydroxide B. Sodium hydroxide C. Calcium hydroxide D. Aluminum hydroxide

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