For which of the following is heat energy released?

Evaporation

Melting

Condensing

Boiling

I know its either A or D

What is the electron structure of an oxygen atom? A.) 1s22s22p4 B.) 1s12s22p4 C.) 1s22s12p4 D.) 1s12s12p4

Carbon dioxide is a molecule made up of a single carbon atom double bonded to two oxygen atoms. The electrons are shared equally between the carbon and the two oxygen atoms. What type of bonding does carbon dioxide have?

Most solids a. are dense and difficult to compress b. are able to flow c. are amorphous d. have a disorderly structure

How many moles of calcium, Ca are in 5.00 g of calcium?

The number of orbitals for the p sublevel is?

How many atoms of oxygen are in 0.100 miles of silicon dioxide, SiO^2

All heat engines involve combustion. True False

What is the mass of 2.2 moles of aluminum oxide (Al2O3) ?

Which are components of cell theory? Check all that apply. All living things are made of cells. Cells are the basic unit of structure and function of all living things. All cells come from other cells. All cells come from nonliving matter.

Suppose you wanted to heat a mug of water (178 mL) from room temperature 10 °C to 52 °C to make a cup of tea. How much energy (in units of joules) would you need from your microwave? (Cwater=4.184 J/g˚C)