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kvasek [131]
3 years ago
8

The colligative property "vapor pressure lowering" is best defined as

Chemistry
1 answer:
lys-0071 [83]3 years ago
4 0
The ability of solutions to lower the vapor pressure of a pure solvent and decrease its evaporation
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Light travels in _______.
Thepotemich [5.8K]
Should be C. I think
7 0
2 years ago
L = 5 m, w = 1 m, h = 3 m<br><br> 15 m3<br> 5 m2<br> 30 m2<br> 9 m3<br> 7.5 m3
melomori [17]

Volume of Cuboid :

  • l × w × h

  • 5 × 1 × 3

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2 years ago
A substance has a volume of 20mL and a density of 2.5 g/mL. what is it’s mass?
DochEvi [55]
2.5X20=50g
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Mass=volumeXdenisty.
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3 years ago
When 1.98g of a hydrocarbon is burned in a bomb calorimeter, the temperature increases by 2.06∘C. If the heat capacity of the ca
schepotkina [342]

Answer:

8.3 kJ

Explanation:

In this problem we have to consider that both water and the calorimeter absorb the heat of combustion, so we will calculate them:

q for water:

q H₂O = m x c x ΔT where m: mass of water = 944 mL x 1 g/mL = 944 g

                                      c: specific heat of water = 4.186 J/gºC

                                     ΔT : change in temperature = 2.06 ºC

so solving for q :

q H₂O = 944 g x 4.186 J/gºC x 2.06 ºC = 8,140 J

For calorimeter

q calorimeter  = C x  ΔT  where C: heat capacity of calorimeter = 69.6 ºC

                                     ΔT : change in temperature = 2.06 ºC

q calorimeter = 69.60J x 2.06 ºC = 143.4 J

Total heat released = 8,140 J +  143.4 J = 8,2836 J

Converting into kilojoules by dividing by 1000 we will have answered the question:

8,2836 J x 1 kJ/J = 8.3 kJ

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3 years ago
The outside boundary of an animal cell
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