How many milligrams of calcium are there if you have 1.05 x 1022 atoms

698mg

Explanation:

1 mole of any substance contains 6.02x10^23 atoms as explained by Avogadro's hypothesis. This means that 1mole of Ca also contains 6.02x10^23 atoms.

1mole of Ca = 40g

40g of CO2 contains 6.02x10^23 atoms.

Therefore, Xmol of Ca will contain 1.05 x 1022 atoms i.e

Xmol of Ca = (40 x 1.05 x 1022)/6.02x10^23 = 0.698g

Recall: 1g = 1000mg

0.698g = 0.698 x 1000 = 698mg

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.