<h3>Answer:</h3>
Mass = 200 g
<h3>Solution:</h3>
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Molarity = 2.0 mol.L⁻¹
Volume = 2.5 L
M.Mass = 40.0 g.mol⁻¹
First calculate Moles as,
Moles = Molarity × Volume
Putting Values,
Moles = 2.0 mol.L⁻¹ × 2.5 L
Moles = 5 mol
Secondly, calculate Mass using following formula,
Moles = Mass ÷ M.Mass
Solving for Mass,
Mass = Moles × M.Mass
Putting Values,
Mass = 5 mol × 40.0 g.mol⁻¹
Mass = 200 g
<h3>
Solution Preparation:</h3>
Add 200 g of NaOH in a Volumetric Flask and add distilled water upto the mark of 2.5 L. Shake it and you have prepared a 2.5 L of 2.0 M solution of NaOH.
Answer:
Volume of ammonia 3 L.
Explanation:
Given data:
Temperature = 25°C ( 25+273= 298 k)
Pressure = 99.5 kpa (99.5/101 = 0.98 atm)
Volume of nitrogen = 1.50 L
Volume of ammonia = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Moles of nitrogen:
PV = nRT
n = PV/RT
n = 0.98 atm × 1.50 L / 0.0821 atm. L/mol. K × 298 K
n = 1.47 /24.5 /mol
n = 0.06 mol
Now we will compare the moles of nitrogen with ammonia.
N₂ : NH₃
1 : 2
0.06 : 2×0.06 = 0.12 mol
Volume of ammonia:
PV = nRT
V = nRT/P
V = 0.12 mol× 0.0821 atm. L/mol. K × 298 K/ 0.98 atm
V = 2.9 atm. L /0.98 atm
V = 3 L
Answer: I’m pretty sure that it’s 3 C3H8O
A I don’t know how to explain it but I just know that it’s A
The answer is 67 hope this helps!!