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ahrayia [7]
4 years ago
7

A car travels 66 kilometers in 3 hours. what is its speed

Chemistry
2 answers:
Ne4ueva [31]4 years ago
8 0

Answer:

22 kph

Explanation:

You simply divide the distance and the time. 66/3 = 22.

Elza [17]4 years ago
4 0
Answer:

Speed = 22 km/h

Explanation:

The equation to calculate speed is as follows:

Speed = distance/time

Since we are given distance and time, all we have to do is plug these values into our formula.

Speed = 66 km / 3 h

Speed = 22 km/h
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195.4915

Explanation:

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During a dilution, what happens to the concentration of a solution?
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B

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Generally, when you dilute something, your goal is to thin your concentration. Even if you added a solute, if your goal is dilution, it will make the concentration decrease.

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melamori03 [73]
D) The same number of each type of atom will always be present before and after a chemical reaction takes place.

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3 years ago
A mixture of CO (g) and excess O2(g) is placed in a 1.0 L reaction vessel at 100.0C and a total pressure of 1.50 atm. The CO is
umka2103 [35]

Answer:

Partial pressure of of CO₂ in the product mixture is 0,20atm

Explanation:

The balance equation is:

2CO(g) + O₂(g) → 2CO₂(g)

Total pressure of CO(g) and O₂(g) gases before reaction at 100,0°C and 1,0L is 1,50 atm. You can say:

X₁ + Y₁  = 1,50atm <em>(1)</em>

Where X₁ is initial partial pressure CO and Y₁ is initial partial pressure of O₂

After reaction partial pressures are:

X₂ = X₁ - 2n = 0; <em>2n = X₁</em>

Y₂ = Y₁ - n

Z₂ = 2n

Where Z₂ is final partial pressure of CO₂

After reaction pressure at 100,0°C and 1,0L is 1,40 atm, that means:

1,40 atm = (Y₂ + Z₂)

1,40 atm = Y₁ - n + 2n

1,40atm = Y₁ + n

1,40 atm = Y₁ + X₁/2 <em>(2)</em>

Replacing (1) in (2)

1,40 atm = 1,50atm - X₁ + X₁/2

-0,10 atm = - X₁/2

<em>0,20 atm = X₁</em>.

As 2n = X₁; 2n =<em> Z₂ = 0,20 atm</em>

I hope it helps!

7 0
3 years ago
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