Question

Помогите рассчитать относительные малярные массы веществ, Li2CO3; P2O3

Answer 1

M(Li2CO3) = 7*2 + 12 + 16*3 = 74 г/моль
M(P2O3) = 31*2 + 16*3 = 110 г/моль

Answer 2

Calculating Relative Molar Masses

To calculate the relative molar masses of the substances Li2CO3 and P2O3, we can use the atomic masses of the elements and sum them according to the chemical formula.

Li2CO3: - Lithium (Li) has an atomic mass of approximately 6.94 u. - Carbon (C) has an atomic mass of approximately 12.01 u. - Oxygen (O) has an atomic mass of approximately 16.00 u.

The relative molar mass of Li2CO3 can be calculated as: 2(Li) + 1(C) + 3(O) = 2(6.94) + 12.01 + 3(16.00) = 6.94 + 12.01 + 48.00 = 66.95 u

P2O3: - Phosphorus (P) has an atomic mass of approximately 30.97 u. - Oxygen (O) has an atomic mass of approximately 16.00 u.

The relative molar mass of P2O3 can be calculated as: 2(P) + 3(O) = 2(30.97) + 3(16.00) = 61.94 + 48.00 = 109.94 u

Therefore, the relative molar masses of Li2CO3 and P2O3 are approximately 66.95 u and 109.94 u respectively.