What is mass?

A. the amount of matter in a substance

B. the amount of weight in a substance

C. the number of atoms in a substance

D. the amount of volume of a substance

At what condition to sodium chloride and silver nitrate react

Which of these compounds is likely to have very low solubilityvin water? A.) NaCl B.) HCl C.) CF4 D.) CuSO4

Charles Darwin did what

For each of these equations, determine the change in the number of moles of gas, δngas.? A.) (NH4) 2 CO3 (s) = 2NH3 (g) + CO2 (g) + H2O (g) B.) H2 (g) + Cl2 (g) = 2HCl (g) C.) 2H2 (g) + O2 (g) = 2H2O (l) D.) 2Na (s) + Cl2 (g) = 2NaCl (s)

How do you define motion? define motion?

Heat is most closely related to ___ energy. A. Nuclear B. Electrical C. Thermal

How many moles are in 26.4 grams of lithium

What is the independent, dependent, control group and constant: A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight.

Where are two places that scientists obtain scientific knowledge

Which of the following best describes what happens when an ionic bond forms? A) two atoms come together and share electrons in order to fill their octets. B) two atoms give up their electrons in order to form a bond.