Answer:
Osmolarity of solution of KCI = 0.40 osmol
Explanation:
Given:
KCL ⇒ K⁺ + Cl⁻
Find:
Osmolarity of solution of KCI
When M = 0.20 M
Computation:
1 mole of KCL = 2 osmol
1 M of KCl = 2 Osmolarity
So,
Osmolarity of solution of KCI = 2 × 0.20
Osmolarity of solution of KCI = 0.40 osmol
Answer:
18 mol
Step-by-step explanation:
Step 1. Balanced equation
4NH₃ + 5O₂ ⟶ 4NO + 6H₂O
Step 2. Calculation:
You want to convert moles of NH₃ to moles of H₂O
The molar ratio is 6 mol H₂O:4 mol NH₃
Moles of H₂O = 12 mol NH₃ × (6 mol H₂O/4 mol NH₃)
Moles of H₂O = 18 mol H₂O
The reaction will form 18 mol of H₂O.
Atomic mass Boron ( B ) = 10.811 u.m.a
10.811 g -------------- 6.02x10²³ atoms
5.40 g ----------------- ?? atoms
5.40 x ( 6.02x10²³) / 10.811 =
3.0069x10²³ atoms
The answer you are looking for is B.
