Sodium hydroxide (NaOH): g/mol
Water (H2O):
g/mol
Glucose (C6H12O6):
g/mol
Calcium sulfate (CaSO4):
g/mol
Magnesium phosphate (Mg3(PO4)2):
g/mol

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

Wagons/motorized vehicles

A1 a 2 a 3 ooh lol i think that's it

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.