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Vladimir79 [104]
4 years ago
5

Colder air tends to have _____.

Chemistry
1 answer:
iogann1982 [59]4 years ago
8 0

Answer:

I believe the answer is D

Explanation:

C is not correct

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The temperature of a 95.4 g piece of Cu increases from 25.0 °C to 48.0 °C when the Cu absorbs 849 J of heat. What is the specifc
melisa1 [442]
<h3>Answer:</h3>

0.387 J/g°C

<h3>Explanation:</h3>
  • To calculate the amount of heat absorbed or released by a substance we need to know its mass, change in temperature and its specific heat capacity.
  • Then to get quantity of heat absorbed or lost we multiply mass by specific heat capacity and change in temperature.
  • That is, Q = mcΔT

in our question we are given;

Mass of copper, m as 95.4 g

Initial temperature = 25 °C

Final temperature = 48 °C

Thus, change in temperature, ΔT = 23°C

Quantity of heat absorbed, Q as 849 J

We are required to calculate the specific heat capacity of copper

Rearranging the formula we get

c = Q ÷ mΔT

Therefore,

Specific heat capacity, c = 849 J ÷ (95.4 g × 23°C)

                                        = 0.3869 J/g°C

                                        = 0.387 J/g°C

Therefore, the specific heat capacity of copper is 0.387 J/g°C

3 0
3 years ago
Explain in complete sentences how a convection current is created.
Aleks04 [339]
Convection currents are caused by the movement of the magma in the mantle.

Hope This Helps You!
Good Luck Studying :)
3 0
4 years ago
Now moles: _(1, 2, or 3)_moles of H2 + _(1, 2, or 3)_ moles of O2 → _(1, 2, or 3)_moles of H2O
arsen [322]

Answer:

2H₂ + O₂ → 2H₂O.

Explanation:

  • For the reaction of water formation:

<em>2H₂ + O₂ → 2H₂O.</em>

  • It should apply the the law of conservation of mass that the no. of reactants atoms is equal to the no. of products atoms.

<em>So, every </em><em>2.0 moles of H₂ </em><em>react with </em><em>1.0 mole of O₂</em><em> to produce </em><em>2.0 moles of H₂O.</em>

<em />

5 0
3 years ago
Achange in which factor will affect the rate of reaction only when gases are involved?
Maslowich

Answer:

Pressure

Gases are the only state of matter that are affected by changes in pressure when it comes to rate of reaction. Solids and liquids are not affected by changes in pressure.

8 0
4 years ago
The volume of a gas is 650.ml at 1.14celsius what will the volume be at 75.0 Celsius?
Triss [41]

Answer: 42763ml

Explanation:

Using Charle's law

V1/T1=V2/T2

V1= 650ml

V2=?

T1= 1.14c

T2= 75c

Substitute the value

650/1.14=V2/75

Cross multiply

650×75=V2×1.14

V2= 650×75/1.14

V2= 42763.16ml

V2= ~42763ml

4 0
4 years ago
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