Question

MR (H2 SIO 3 ) = 1•2+8+16•3

Answer 1

Объяснение:

Mr(H2SiO3)=(1×2)+28+(16×3)=78

Answer 2

To calculate the molar mass of a compound, we need to sum up the atomic masses of all the atoms present in the formula.

Let's break down the formula MR(H2SIO3):

H2SIO3:

• 2 hydrogen atoms (H): 2 * atomic mass of hydrogen = 2 * 1 = 2
• 1 silicon atom (Si): 1 * atomic mass of silicon = 1 * 28.0855 = 28.0855
• 3 oxygen atoms (O): 3 * atomic mass of oxygen = 3 * 15.999 = 47.997

Now, we can calculate the molar mass by summing up the atomic masses:

MR(H2SIO3) = 2 + 28.0855 + 47.997 = 78.0825 g/mol

Therefore, the molar mass of H2SIO3 is approximately 78.0825 g/mol.