400 gm mixture of AB and `AC_(2)` contains `26.25%` of A by mass. Select the correct statements. (Atomic masses of A = 15, B = 25, C= 22.5)

10 moles of A_(2)B_(3) contains 100 gm A atom and 60 gm B atoms. Choose the correct statements.

Chlorophyll, the green colouring matter of plants contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms present in 2.5 g of chlorophyll.

Objective question (only one correct). i. The simplest formula of a compound containing 50% of element A (atomic mass 10) and 50% of element B (atomic mass 20) is: a. AB b. A_(2) B c. A_(2) B_(3) d. AB_(3)

Objective question (only one correct). I. Which of the following has least mass? a. 1 mol of S b. 3 xx 10^(23) atom of C c. 2 g atom of nitrogen d. 7.0 g of Ag ii. The simplest formula of a compound containing 50% of element A (atomic mass 10) and 50% of element B (atomic mass 20) is: a. AB b. A_(2) B c. A_(2) B_(3) d. AB_(3)

Objective question (only one correct). I. Which of the following has least mass? a. 1 mol of S b. 3 xx 10^(23) atom of C c. 2 g atom of nitrogen d. 7.0 g of Ag ii. The simplest formula of a compound containing 50% of element A (atomic mass 10) and 50% of element B (atomic mass 20) is: a. AB b. A_(2) B c. A_(2) B_(3) d. AB_(3)

The solubility of AB_(2) is 0.05 g per 100 mL at 25^@ C .Calculate K_(sp) of AB_(2) at 25^(@)C ? [Atomic mass of A = 20 amu, atomic mass of B = 40 amu]

The solubility of AB_(2) is 0.05 g per 100 mL at 25^@ C .Calculate K_(sp) of AB_(2) at 25^(@)C ? [Atomic mass of A = 20 amu, atomic mass of B = 40 amu]