mol = mass/Mr
rearrange
mol x Mr = mass
2 x 126.9g = 253.8g
0.377 grams of Kr is equal to 0,0045 moles.
124 grams of ethane is equal to 4,124 moles.
15 grams of nitrogen are equal to 1,071 moles.
6,5 grams of sulfur S are equal to 0,203 moles.
89 grams of Pb(CH3COO)4 is equal to 0,2 moles.
222,6 grams of iodine is equivalent to 1,754 moles.
380.7 grams of iodineis equivalent to 3 moles.
0.377 grams of Kr is equal to 0,0045 moles.
124 grams of ethane is equal to 4,124 moles.
370 grams of mercury is equal to 1,844 moles.
1,99 grams of aluminum is equal to 0,0737 moles.
15 grams of nitrogen are equal to 1,071 moles.
6,5 grams of sulfur S are equal to 0,203 moles.
89 grams of Pb(CH3COO)4 is equal to 0,2 moles.
7,68 grams of calcium nitride is equal to 0,052 moles.
75 grams water is equal to 4,166 moles.
1 mole is equal to 18 grams of H2O, so 60 grams is 3.33 moles.