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Margarita [4]
3 years ago
14

4. What current is drawn by a 90 W light bulb on a 110 V household circuit?

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
3 0

Answer:

Explanation:

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What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 ​ h 8 ​ ) (density = 0.867 g/ml) to a 250 m
Virty [35]

Answer:

2.48 mol/L.

Explanation:

  • The molarity of the solution can be expressed as <em>the number of moles of solute in 1.0 liter of the solution, </em>(M = n / V).
  • It is also can be calculated from the relation:

<em>M = (mass / molar mass) solute x (1000 / V of solution)</em>

The solute is toluene and the solvent is benzene.

mass of toluene (solute) = 57.1 g,

molar mass of toluene (solute) = 92.14 g/mol.

volume of the solution = 250 ml.

∴ M =  (mass / molar mass) solute x (1000 / V of solution) = [(57.1 g / 92.14 g/mol) x (1000 / 250 ml)] = 2.48 mol/L.

4 0
3 years ago
Find concentration of solution of 45g of glucose is dissolved in water to prepare 500g solution?​
ivolga24 [154]

Answer:

9% solution by mass

Explanation:

If there is 500 gm of solution and 45 g of it is glucose then:

45/500 * 100% = 9 % solution

3 0
2 years ago
Why do solids expand on heating?
sdas [7]

Explanation:

The molecules of solids are shrinked in there normal state . but as a heat energy is produced , the molecules starts curating fast and fast as temperature goes up . since they vibrate , they hit and collide each other breaking the bondings this increases the surface of area of the solid , and molecules consumes that space and they expand .

5 0
3 years ago
Perform the following mathematical operation and then report the answer.
Kisachek [45]
The answer would be 833.7
7 0
3 years ago
Name two ways adding salt to lower the freezing temperature benefits you.
miss Akunina [59]

Answer:

Explanation:

Lowers freezing point

3 0
3 years ago
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