The table below shows the number of sub-atomic particles in an atom of magnesium. Sub-atomic Particles
Sub-atomic Particle Number
Protons 12
Neutrons 12
Electrons 12

What is the amu of a magnesium atom?
0
12
24
36

What is the specific heat of a substance that absorbs 2.5×10^3 joules of heat when a sample of 1.0 ×10^4g of the substance increases in temperature from 10°c to 70°c?

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.