Question

Обчисліть молярні маси речовин за їх формулами: а) NH3 , KNO3 б) CI2 , Na S024​

Answer 1

Ответ:

Объяснение:

M(NH3) = 14 + 1*3 = 17 г/моль

M(KNO3) = 39 + 14 + 16*3 =101 г/моль

M(Cl2) = 35,5*2 = 71 г/моль

M(Na2SO4) = 23*2 + 32 + 16*4 =142 г/моль

Answer 2

а) NH3 Molar mass of N = 14.01 g/mol Molar mass of H = 1.01 g/mol To calculate the molar mass of NH3, we add the molar masses of N and H: Molar mass of NH3 = (14.01 g/mol) + 3 * (1.01 g/mol) = 17.03 g/mol

Molar mass of K = 39.10 g/mol Molar mass of N = 14.01 g/mol Molar mass of O = 16.00 g/mol To calculate the molar mass of KNO3, we add the molar masses of K, N, and O: Molar mass of KNO3 = (39.10 g/mol) + (14.01 g/mol) + 3 * (16.00 g/mol) = 101.10 g/mol

б) Cl2 Molar mass of Cl = 35.45 g/mol To calculate the molar mass of Cl2, we multiply the molar mass of Cl by 2: Molar mass of Cl2 = 2 * (35.45 g/mol) = 70.90 g/mol

Molar mass of Na = 22.99 g/mol Molar mass of S = 32.07 g/mol Molar mass of O = 16.00 g/mol To calculate the molar mass of Na2SO4, we add the molar masses of Na, S, and O: Molar mass of Na2SO4 = 2 * (22.99 g/mol) + 32.07 g/mol + 4 * (16.00 g/mol) = 142.04 g/mol