Final answer:
To calculate the mass of a substance in grams, you need to use its molar mass and multiply it by the number of moles. The molar mass can be found by looking up the atomic masses of the elements in the periodic table and calculating the sum. Then multiply the molar mass by the number of moles and convert to grams.
Step-by-step explanation:
To calculate the mass of a substance in grams, you need to use its molar mass. The molar mass is the mass of one mole of the substance. To find the molar mass, you can look up the atomic masses of the elements in the periodic table and calculate the sum. Once you have the molar mass, you can multiply it by the number of moles given and convert to grams using the conversion factor 1 mole = molar mass (g/mol).
(a) 5.14 mol of He:
Molar mass of He = 4.00 g/mol
Mass = 5.14 mol * 4.00 g/mol = 20.56 g of He
(b) 0.0428 mol of Ni:
Molar mass of Ni = 58.69 g/mol
Mass = 0.0428 mol * 58.69 g/mol = 2.51 g of Ni
(c) 1.45 mol of Ti:
Molar mass of Ti = 47.87 g/mol
Mass = 1.45 mol * 47.87 g/mol = 69.43 g of Ti
(d) 0.00410 mol of Ge:
Molar mass of Ge = 72.63 g/mol
Mass = 0.00410 mol * 72.63 g/mol = 0.298 g of Ge