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d1i1m1o1n [39]
3 years ago
12

Please someone help

Mathematics
1 answer:
Natalija [7]3 years ago
6 0
For the first one 25cm2 is your answer. You can start by doing 25 - 3 which equals 22. Then you need to find out what x is. So you have 2x. Something x 2 = 22. That is 11. Therefore x = 11. So basically the question is saying 2 x 11 + 3 = 25.
I hope this helps!!
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Answer:

1. 40

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3 years ago
Two containers, X and Y, are each filled by an ideal gas at the same temperature. The volume of Y is half the volume of X. The n
-Dominant- [34]

Answer:

The answer to the question is

The ratio of the two gas pressures   \frac{P_{x} }{P_{y} } , that is Px to Py = 1/6

Step-by-step explanation:

Let the gases Volumes be V₁ and V₂

Where volume of X = V₁ and

volume of Y = V₂

The volume of Y is half the volume of X

∴ V₂  =  \frac{1}{2} × V₁

Let the number of moles be n₁ and n₂ in X and Y respectively

therefore  n₂ = 3 × n₁

The pressure of the gas in X is Pₓ and the pressure of the gas in Y is  P_{y} then we have

P₁ × V₁  = n₁ × R × T₁ , and P₂ × V₂ = n₂ × R × T₂

(P₁ × V₁)/(n₁ × T₁) = (P₂ × V₂)/(n₂ × T₂)

but T₁ = T₂

Therefore

(P₁ × V₁)/n₁ = (P₂ × V₂)/n₂.  However  n₂ = 3 × n₁  and V₂  =  \frac{1}{2} × V₁ therefore substituting in the equation we have

(P₁ × V₁)/n₁ = (P₂ ×  \frac{1}{2} × V₁ )/(3 × n₁) from where

P₁ /P₂ =  (\frac{1}{2} × V₁ × n₁)/(V₁×3 × n₁) =0.5/3 = 1/6

The ratio of \frac{P_{x} }{P_{y} } = 1/6

6 0
4 years ago
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Svetach [21]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
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Taya2010 [7]
14 students is the correct answer
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5 0
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