general chemistry knowledge

Question 1

subatomic particles

Answer 1

protons= + charge/ 1-mass/ located at nucleus

neutrons= neutral charge/ 1-masss/ located at the nucleus

electrons= charge/ 1/1836- mass/ electron shells

Question 2

molecular mass

Answer 2

sum of all relative atomic mass

Question 3

calculation of moles

Answer 3

moles= mass(grams)/ molar mass

moles= units are mol

Question 4

number of molecules=

Answer 4

moles x 6.02x10^23

Question 5

number of atoms=

Answer 5

molesx number of atoms x 6.02x10^23

Question 6

percentage of an element in a compound

Answer 6

molecular mass of substance/ molecular mass of compound

Question 7

calculate atom economy

Answer 7

coifcent x mass of useful products/ total mass of reactants

Question 8

acid + base =

Answer 8

salt + water

Question 9

acid + metal oxide =

Answer 9

salt + water

Question 10

acid + metal hydroxide=

Answer 10

salt + water

Question 11

acid + metal=

Answer 11

salt + hydrogen

Question 12

acid + metal carbonate=

Answer 12

salt + water + carbon dioxide

Question 13

concentration=

Answer 13

moles/ volume(liters)

Question 14

titration

Answer 14

to determine concentration of an unknown solution