Question

1. U(ню)H(2)=2 моль М-? 2. U (O2)=3 моль М-? 3. U (H2O)=5 моль М-? U(NaI)= 0.6 моль

Answer 1

m(H2) = 2моль * 2г/моль = 4г

m(O2) = 3моль * 32г/моль = 96г

m(H2O) = 5моль * 18г/моль = 90г

m(NaI) = 0,6моль * 150г/моль = 90г

Answer 2

It seems like you're providing chemical equations and asking for the molar masses (Molar Mass, M) of the compounds involved. To find the molar masses, we'll sum up the atomic masses of each element in the compound.

1. U(ню)H(2) = 2 mol The given chemical formula is a bit unclear. I assume you meant U(Ni)H2, where Ni represents the element Nickel.

Molar mass of Ni: 58.69 g/mol (as of my knowledge cutoff in September 2021) Molar mass of H: 1.01 g/mol (approximately)

Molar mass of U(Ni)H2 = 2 * M(Ni) + 2 * M(H) ≈ 2 * 58.69 + 2 * 1.01 ≈ 118.4 g/mol

2. U(O2) = 3 mol The chemical formula here indicates oxygen gas (O2).

Molar mass of O2: 2 * M(O) ≈ 2 * 16.00 ≈ 32.00 g/mol

3. U(H2O) = 5 mol The chemical formula indicates water (H2O).

Molar mass of H2O: 2 * M(H) + M(O) ≈ 2 * 1.01 + 16.00 ≈ 18.02 g/mol

4. U(NaI) = 0.6 mol The chemical formula indicates sodium iodide (NaI).

Molar mass of NaI: M(Na) + M(I) ≈ 22.99 + 126.90 ≈ 149.89 g/mol

Please note that the molar masses are based on the atomic masses of elements as of my knowledge cutoff in September 2021. If there have been updates or changes to the atomic masses, the molar masses would be slightly different.