Converting mols to molecules and molecules to mols PLEASE HELP!!! 3. How many moles of oxygen atoms are present in 8.42 x 1024 molecules of lithium carbonate (LiCO3) ?

4. How many moles of nitrogen are present in 5.3 moles of tin (IV) nitrate (N4O12Sn)?

5. How many molecules of tin (IV) nitrate (N4O12Sn) would contain 6.17 moles of oxygen atoms?

6. How many moles of aluminum sulfate (Al4(SO4)3 )would contain 3.54 x 1025 sulfur atoms?

7. How many rubidium atoms would be present in 9.47 moles of rubidium sulfide (Rb2S)?

8. How many carbon atoms would be present in 2.95 moles of sucrose (C12H22O11)?

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation:

the awnser is group 12