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what does atomic number describe?

a. mass

b. number of neutrons

c. number of protons

d. atomic weight
what is the number of protons plus the number of neutrons in the nucleus of an atom equivalent to?

a. atomic charge

b. mass number

c. atomic number
d. average atomic mass

Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules