Question

Задание 2. Вычислите относительную молекулярную массу следующих химических соединений: А) гидрокарбонат калия KHCO3 Б) гидроксид кальция Ca (OH)2 В) серная кислота H2SO4 пж срочно

Answer 1

Объяснение:

А) гидрокарбонат калия KHCO3

М(KHCO3)= 39+1+12+3*16=100г/моль

Б) гидроксид кальция Ca (OH)2

М(Ca (OH)2)=40+2*(1+16)=74г/моль

В) серная кислота H2SO4

М(H2SO4)=1*2+32+4*16=98г/моль

Answer 2

Calculation of Relative Molecular Mass

To calculate the relative molecular mass of a compound, we need to consider the atomic masses of the elements present in the compound and their respective stoichiometric coefficients.

Let's calculate the relative molecular masses of the given compounds:

A) Hydrogen Carbonate Potassium (KHCO3): - The compound consists of one potassium atom (K), one hydrogen atom (H), one carbon atom (C), and three oxygen atoms (O). - The atomic masses of these elements are: K = 39.10 g/mol, H = 1.01 g/mol, C = 12.01 g/mol, O = 16.00 g/mol. - The stoichiometric coefficients are: K = 1, H = 1, C = 1, O = 3. - Therefore, the relative molecular mass of KHCO3 can be calculated as follows:

(1 * 39.10 g/mol) + (1 * 1.01 g/mol)