No it does not represent an isotope. The number of neutrons changes in an isotope, not the number of electrons.
Missing question: What is the vapor pressure of the solution at 25°<span>C?
n(NaCl) = 100 g </span>÷ 58,4 g/mol.
n(NaCl) = 1,71 mol.
NaCl → Na⁺ + Cl⁻, amount of ions are 2 · 1,71 mol = 3,42 mol.
n(CaCl₂) = 100 g ÷ 111 g/mol = 0,9 mol.
CaCl₂ → Ca²⁺ + 2Cl⁻, amount of ions 3 · 0,9 mol = 2,7 mol.
m(solution) = 1000 ml (1,00 L) · 1,15 g/ml = 1150 g.
m(H₂O) = 1150 g - 100 g - 100 g = 950 g.
n(H₂O) = 950 g ÷ 18 g/mol = 118,75 mol.
<span>water's mole fraction = 118,75 mol </span>÷ (118,75 mol + 2,7 mol + 3,42 mol).
water's mole fraction = 0,95.
p(solution) = 0,95 · 23 mmHg = 21,85 mmHg.
5.76 g of are consumed when is burned to yield 5.3 grams of .
<h3>
What is a mole?</h3>
A mole is defined as 6.02214076 × of some chemical unit, be it atoms, molecules, ions, or others.
Calculating moles of
Number of mole of =
= = 0.12 mol
As is clear from the reaction stoichiometry, 9 moles of 6 moles of .
Calculating the number of moles of
= 0.18 mol
Mass of =5.76 g
Hence, 5.76 g of are consumed when yield 5.3 grams of .
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Answer: 824.6 g of NaCl are produced from 500.0 g of chlorine.
Explanation:
To calculate the moles :
According to stoichiometry :
1 mole of produce = 2 moles of
Thus 7.04 moles of will produce= of
Mass of
Thus 824.6 g of NaCl are produced from 500.0 g of chlorine.