Question

1)Mr (Fe2 (SO4)4) = 2)Mr (AC(OH)3)=3) Mr (CA(NO3)2)=4) Mr (AL(OH)3)=5) Mr (H2SO4) =6) Mr (HNO3)=7) Mr (CA(OH)2)=

Answer 1

Fe2(SO4)4 - нет такого вещества. есть FeSO4 или Fe2(SO4)3

1)Mr (Fe2 (SO4)4) =400гр/моль

2)Mr (AC(OH)3)= 278 гр/моль . вы уверены, что именно гидроксид актиния? весьма экзотическое соединение:)

3) Mr (CA(NO3)2)=164гр/моль

4) Mr (AL(OH)3)=78гр/моль

5) Mr (H2SO4) =98 гр/моль

6) Mr (HNO3)=63 гр/моль

7) Mr (CA(OH)2)=74 гр/моль

Answer 2

1) Mr(Fe2(SO4)4): To calculate the molar mass of Fe2(SO4)4, we need to consider the molar mass of each element present in the compound.

Fe: Atomic mass of Fe = 55.845 g/mol S: Atomic mass of S = 32.06 g/mol O: Atomic mass of O = 16.00 g/mol

So, the molar mass of Fe2(SO4)4 can be calculated as follows: (2 * 55.845) + (4 * (32.06 + (4 * 16.00))) = 2 * 55.845 + 4 * 88.06 = 111.69 + 352.24 = 463.93 g/mol

Therefore, the molar mass of Fe2(SO4)4 is 463.93 g/mol.

2) Mr(AC(OH)3): To calculate the molar mass of AC(OH)3, we need to consider the molar mass of each element present in the compound.

A: Atomic mass of A = unknown C: Atomic mass of C = 12.01 g/mol O: Atomic mass of O = 16.00 g/mol H: Atomic mass of H = 1.01 g/mol

Since the atomic mass of A is unknown, we cannot calculate the exact molar mass of AC(OH)3 without knowing the identity of element A.

3) Mr(CA(NO3)2): To calculate the molar mass of Ca(NO3)2, we need to consider the molar mass of each element present in the compound.

Ca: Atomic mass of Ca = 40.08 g/mol N: Atomic mass of N = 14.01 g/mol O: Atomic mass of O = 16.00 g/mol

So, the molar mass of Ca(NO3)2 can be calculated as follows: 40.08 + 2 * (14.01 + (3 * 16.00)) = 40.08 + 2 * (14.01 + 48.00) = 40.08 + 2 * 62.01 = 40.08 + 124.02 = 164.10 g/mol

Therefore, the molar mass of Ca(NO3)2 is 164.10 g/mol.

4) Mr(AL(OH)3): To calculate the molar mass of Al(OH)3, we need to consider the molar mass of each element present in the compound.

Al: Atomic mass of Al = 26.98 g/mol O: Atomic mass of O = 16.00 g/mol H: Atomic mass of H = 1.01 g/mol

So, the molar mass of Al(OH)3 can be calculated as follows: 26.98 + 3 * (16.00 + 1.01) = 26.98 + 3 * 17.01 = 26.98 + 51.03 = 78.01 g/mol

Therefore, the molar mass of Al(OH)3 is 78.01 g/mol.

5) Mr(H2SO4): To calculate the molar mass of H2SO4, we need to consider the molar mass of each element present in the compound.

H: Atomic mass of H = 1.01 g/mol S: Atomic mass of S = 32.06 g/mol O: Atomic mass of O = 16.00 g/mol

So, the molar mass of H2SO4 can be calculated as follows: 2 * 1.01 + 32.06 + 4 * 16.00 = 2.02 + 32.06 + 64.00 = 98.08 g/mol

Therefore, the molar mass of H2SO4 is 98.08 g/mol.

6) Mr(HNO3): To calculate the molar mass of HNO3, we need to consider the molar mass of each element present in the compound.

H: Atomic mass of H = 1.01 g/mol N: Atomic mass of N = 14.01 g/mol O: Atomic mass of O = 16.00 g/mol

So, the molar mass of HNO3 can be calculated as follows: 1.01 + 14.01 + 3 * 16.00 = 1.01 + 14.01 + 48.00 = 63.02 g/mol

Therefore, the molar mass of HNO3 is 63.02 g/mol.

7) Mr(CA(OH)2): To calculate the molar mass of Ca(OH)2, we need to consider the molar mass of each element present in the compound.

Ca: Atomic mass of Ca = 40.08 g/mol O: Atomic mass of O = 16.00 g/mol H: Atomic mass of H = 1.01 g/mol

So, the molar mass of Ca(OH)2 can be calculated as follows: 40.08 + 2 * (16.00 + 1.01) = 40.08 + 2 * 17.01 = 40.08 + 34.02 = 74.10 g/mol

Therefore, the molar mass of Ca(OH)2 is 74.10 g/mol.