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Vitek1552 [10]
3 years ago
6

What is the freezing point of an aqueous 1.58 molal nacl solution?

Chemistry
1 answer:
Alina [70]3 years ago
4 0
<span>Tf is the freezing point of the solution(the solvent plus solute). T*f is the freezing point of the pure solvent(without solute) i is the van't Hoff factor.It is approximately the number of particles in solution that are made for each particle of the solute that is placed into solution.Therefore, for nonelectrolytes, i = 1. Kf is the freezing point depression constant.For water, Kf = 1.86 Degree C/m, or 1.86 Degree C.kg/mol. Tf is -1.58 Degree C</span>
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The wave produced by a fireworks "explosion" is a light wave.

Explanation:

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The center of an atom is called the nucleus where the protons and neutrons are.  Hope it helps!! 
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Identify each of the following reactions as balanced or unbalanced. CH4+ 2O2 → CO2 + 2H2O: CaCl2+ 2AgNO3 → Ca(NO3)2 + 2AgCl: 3Fe
kap26 [50]

1) The answer is: chemical reaction is balanced.

Chemical reaction: CH₄ + O₂ → CO₂ + H₂O.

Oxidation reaction: C⁻⁴ → C⁺⁴ + 8e⁻.

Reduction reaction: O₂ + 4e⁻ → 2O⁻² /×2; 2O₂ + 8e⁻ → 4O⁻².

Balanced chemical reaction: CH₄ + 2O₂ → CO₂ + 2H₂O.

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2) The answer is: chemical reaction is balanced.

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Number of atoms must be the same on left and right side of balanced chemical reaction according to the law of conservation of mass or principle of mass conservation.

There are two chlorine atoms (Cl), one calcium atom (Ca), six oxygen atoms (O), one nitrogen atoms (N) and two silver atoms (Ag) in this balanced chemical reaction.

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Number of aluminium atoms (Al) is unbalanced. There are four aluminium atoms on the left and eight aluminium atoms on right side of chemical reaction.

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3 years ago
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Delvig [45]

Hi there!

\large\boxed{3.203 *  10^{22} atoms}

We can use the following conversions to solve:

Total mass --> amount of mols --> amount of atoms (Avogadro's number)

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3.61 g * (1 mol BF₃ / 67.8 g) ≈ 0.0532 mol BF₃

Use avogadro's number to convert:

0.0532 mol * 6.02× 10²³atoms / 1 mol = 3.203 × 10²² atoms

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