Molarity (M) = moles of solute (mol) / Volume of the solution (L)
Molarity of the solution = 3.000 M
Volume of the solution = 250.0 mL = 0.25 L
moles in 250.0 mL = molarity x volume of the solution
= 3.000 M x 0.25 L
= 0.75 mol
Hence, 0.75 mol of NaCl is needed to prepare 250.0 mL of 3.000 M NaCl solution.
Moles (mol) = mass (g) / molar mass (g/mol)
Moles of NaCl in 250.0 mL = 0.75 mol
Molar mass of NaCl = <span>58.44 g/mol
Mass of NaCl in 250.0 mL = Moles x Molar mass
= 0.75 mol x </span><span>58.44 g/mol
= 43.83 g
Hence, 43.83 g of NaCl is needed to prepare 250.0 mL of 3.000 M solution.</span>
Answer:
Molecular formula = B₃N₃H
₆
Explanation:
Given data:
Percentage of B = 40.3%
Percentage of N = 52.2%
Percentage of H = 7.5%
Molar mass = 80g/mol
Molecular formula = ?
Solution:
Number of gram atoms of B = 40.3/ 10.8= 3.73
Number of gram atoms of N = 52.2/ 14 = 3.73
Number of gram atoms of H = 7.5 / 1 = 7.5
Atomic ratio:
B : N : H
3.73/3.73 : 3.73/3.73 : 7.5/3.73
1 : 1 : 2
B : N : H = 1 : 1 : 2
Empirical formula is BNH
₂
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
n = 80 g/mol/ 26.8 g/mol
n = 3
Molecular formula = n (empirical formula)
Molecular formula = 3 (BNH
₂)
Molecular formula = B₃N₃H
₆
Mass of X produced : D. 4.6 g
<h3>Further explanation</h3>
Reaction
Decomposition of Magnesium nitrate into Magnesium oxide, Oxygen, and Nitrogen oxides
2 Mg(NO₃)₂ → 2 MgO + 4 NO₂ + O₂
mol Magnesium nitrate-Mg(NO₃)₂(MW=148,3 g/mol) :
mol ratio Mg(NO₃)₂ : NO₂ = 2 : 4, so mol NO₂ :
mass NO₂(MW=46 g/mol) :
.
Answer:
a and b.
Explanation:
I am assuming you mean LICl and NaCl.
a and b are soluble in water.
AgCl is insoluble - If you add sliver nitrate solution (Ag NO3 ) to NaCl solution a white precipitate of AGCl is formed.
Answer:
1. Pressure increases
2. Volume increases
Explanation:
1. According to Gay-Lussac's law, at constant volume, the ratio of temperature and pressure is constant or they are directly proportional which essentially means if one increases or decreases, the other will too.
2. According to Charles' law, the volume is directly proportional to the temperature at constant pressure.
Hope that helped:)