1) масса одной молекулы Водорода ( H2 ) одинакова 3,3510- какова

Задачка 1
M (H₂) = Mr (H₂) = Ar (H) * N (H) = 1 * 2 = 2 г/моль.

Задачка 2
N (H₂SO₄) = n (H₂SO₄) * NA = 2 * 6,02*10^23 = 1,204*10^24.

Задача 3
M (H₂O) = Mr (H₂O) = Ar (H) * N (H) + Ar (O) * N (O) = 1 * 2 + 16 * 1 = 18 г/моль;
n (H₂O) = m (H₂O) / M (H₂O) = 36 / 18 = 2 моль.

Задачка 4
M (CO₂) = Mr (CO₂) = Ar (C) * N (C) + Ar (O) * N (O) = 12 * 1 + 16 * 2 = 44 г/моль;
m (CO₂) = n (CO₂) * M (CO₂) = 0,5 * 44 = 22 г.

Задачка 5
а) M (NaCl) = Mr (NaCl) = Ar (Na) * N (Na) + Ar (Cl) * N (Cl) = 23 * 1 + 35,5 * 1 = 58,5 г/моль;
n (NaCl) = m (NaCl) / M (NaCl) = 1000 / 58,5 = 17,1 моль;
б) M (NO₂) = Mr (NO₂) = Ar (N) * N (N) + Ar (O) * N (O) = 14 * 1 + 16 * 2 = 46 г/моль;
n (NO₂) = m (NO₂) / M (NO₂) = 1000 / 46 = 22 моль;
в) M (Al₂S₃) = Mr (Al₂S₃) = Ar (Al) * N (Al) + Ar (S) * N (S) = 27 * 2 + 32 * 3 = 150 г/моль;
n (Al₂S₃) = m (Al₂S₃) / M (Al₂S₃) = 1000 / 150 = 7 моль;
г) M (CaCl₂) = Mr (CaCl₂) = Ar (Ca) * N (Ca) + Ar (Cl) * N (Cl) = 40 * 1 + 35,5 * 2 = 111 г/моль;
n (CaCl₂) = m (CaCl₂) / M (CaCl₂) = 1000 / 111 = 9 моль;
д) M (BaCl₂) = Mr (BaCl₂) = Ar (Ba) * N (Ba) + Ar (Cl) * N (Cl) = 137 * 1 + 35,5 * 2 = 208 г/моль;
n (BaCl₂) = m (BaCl₂) / M (BaCl₂) = 1000 / 208 = 4,8 моль.