How many moles of calcium (ca) atoms are there in 77.4 g of ca?

1.94 moles

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number of particles.

To calculate the moles, we use the equation:

Given mass = 77.4 g

Molar mass = 40 g/mol

Putting in the values:

Thus 1.94 moles of calcium atoms are there in 77.4 g of Ca.

answer; economic order quantity;

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.