Question

1) 2 mol Casg-?2) 0,25 mol BaCO3g-?​

Answer 1

Ответ:

1) 144г

2) 49.25г

Answer 2

To determine the mass of the given substances, you can use their molar masses and the number of moles provided. The molar masses are:

1. Ca (Calcium) has a molar mass of approximately 40.08 g/mol.
2. BaCO3 (Barium carbonate) has a molar mass of approximately 197.34 g/mol.

Now, let's calculate the mass for each:

1. 2 moles of Ca: Mass = 2 moles x 40.08 g/mol = 80.16 grams

So, 2 moles of calcium (Ca) weigh approximately 80.16 grams.

2. 0.25 moles of BaCO3: Mass = 0.25 moles x 197.34 g/mol = 49.34 grams

So, 0.25 moles of barium carbonate (BaCO3) weigh approximately 49.34 grams.