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bagirrra123 [75]
3 years ago
10

Why is it important to study chemical reactions in closed containers

Chemistry
2 answers:
tino4ka555 [31]3 years ago
7 0
Because they could have an explosive reaction and could possibly hurt you

kondaur [170]3 years ago
4 0
So that the chemicals you are studying are isolated off from anything outside of the container. If you were to study chemicals out in the open, air, oxygen, or anything or the sort could end up combining and reacting with the chemicals, which is something you probably don't want. 
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An 8.42 g piece of metal with a specific heat of 1.020 J g-1 k-1 wasn't heated to an unknown temperature. The metal was then pla
ANTONII [103]

Answer:

T = 61.344\,^{\textdegree}C

Explanation:

The heat received by water is equal to the heat rejected by the piece of metal. That is to say:

-Q_{piece} = Q_{water}

(8.42\,g) \cdot \left(1.020\,\frac{J}{g\cdot ^{\textdegree}C}  \right) \cdot (T - 20.40\,^{\textdegree}C)= (44.2\,g)\cdot \left(4.187\,\frac{J}{g\cdot ^{\textdegree}C} \right)\cdot (20.40\,^{\textdegree}C-18.50\,^{\textdegree}C)

\left(8.588\,\frac{J}{^{\textdegree}C} \right)\cdot (T-20.40\,^{\textdegree}C) = 351.624\,J

The initial temperature of the piece of metal is:

T = 61.344\,^{\textdegree}C

4 0
3 years ago
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A gas at constant volume has a pressure of 4. 50 atm at 200. K. What will be the pressure of the gas at 250. K? 3. 60 atm 4. 60
Trava [24]

5.625 atm will be the pressure of the gas at 250 K temperature of the gas at constant volume.

<h3>How we calculate the pressure of the gas?</h3>

Pressure of the gas will be calculated by using the ideal gas equation as:

PV = nRT,

From the question, it is clear that:

Moles of the gas and volume is constant here, so we calculate the pressure by rearranging the above equation as:

P/T = nR/V

And required equation will be:

P₁/T₁ = P₂/T₂, where

P₁ = pressure of gas = 4.50 atm

T₁ = temperature of gas = 200 K

P₂ = pressure of gas = to find?

T₂ = temperature of gas = 250 K

On putting all these values in the above equation, we get

P₂ = 4.50 × 250 / 200 = 5.625 atm

Hence, 5.625 atm is the pressure of the gas.

To know more about ideal gas equation, visit the below link:

brainly.com/question/1056445

5 0
3 years ago
Howmany copper atoms there is in Copper(II) oxide?​
Oxana [17]

Answer:

copper(ll) has 4 oxygen atoms

8 0
3 years ago
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Which element has two valence electrons?
Colt1911 [192]

Answer:

It is A) Calcium

Explanation:

Calcium has an electronic configuration of 2,8,8,2

6 0
3 years ago
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In which direction does a bag at rest move when a force of 20 newtons is applied from the right?
kow [346]

Answer: B!

Explanation: In the direction opposite of the direction of the applied force.There is no force in the other side being applied.

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3 years ago
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