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ICE Princess25 [194]
4 years ago
12

When the molecules of gases are heated, the average kinetic energy of the molecules increases,

Chemistry
1 answer:
serious [3.7K]4 years ago
6 0
True is the answer to this
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A chemist prepares a solution of barium chloride by measuring out of barium chloride into a volumetric flask and filling the fla
mezya [45]

The given question is incomplete. The complete question is:

A chemist prepares a solution of barium chloride by measuring out 110 g of barium chloride into a 440 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in mole per liter of the chemist's barium chloride solution. Round your answer to 3 significant digits.

Answer: Concentration of the chemist's barium chloride solution is 1.20 mol/L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times }{V_s}

where,

n = moles of solute

V_s = volume of solution in L

moles of BaCl_2(solute) = \frac{\text {given mass}}{\text {Molar Mass}}=\frac{110g}{208g/mol}=0.529mol

Now put all the given values in the formula of molality, we get

Molality=\frac{0.529\times 1000}{440ml}=1.20mole/L

Therefore, the molarity of solution is 1.20 mol/L

8 0
3 years ago
Starting from position 3,5 go west 7 , then south 7, then east 4 what’s your ending point?
Vsevolod [243]

Answer:

-1, -2

Explanation:

West is left south is down east is right

5 0
3 years ago
Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence elec
Dafna1 [17]

potassium is just below the sodium in periodic table in s group !

so the valence electron of sodium and potassium is same and that is 1

4 0
3 years ago
Read 2 more answers
For the reaction Cu2S(s)⇌2Cu+(aq)+S2−(aq)Cu2S(s)⇌2Cu+(aq)+S2−(aq), the equilibrium concentrations are as follows: [Cu+]=1.0×10−5
klio [65]

Answer:

1x10⁻¹²

Explanation:

  • Cu₂S(s) ⇌ 2Cu⁺(aq) + S²⁻(aq)

At equilibrium:

  • [Cu⁺] = 1.0x10⁻⁵ M
  • [S²⁻] = 1.0x10⁻² M

The equilibrium constant for the the reaction can be written as:

  • Keq = [Cu⁺]² * [S²⁻]

[Cu⁺] is squared because it has a stoichiometric coefficient of 2 in the reaction. <em>Cu₂S has no effect on the constant because it is a solid</em>.

Now we can <u>calculate the equilibrium constant</u>:

  • Keq = (1.0x10⁻⁵)² * 1.0x10⁻² = 1x10⁻¹²
8 0
3 years ago
The answers please to this
Vlad1618 [11]
I know for number 4 the answer is c, sorry I can't help with the others.
5 0
3 years ago
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