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aivan3 [116]
3 years ago
6

The gas in an engine cylinder is compressed until it has a volume of 0.045 liter and an absolute pressure of 28 atmospheres. If

the engine cylinder contains 0.020 mole of gas, what is its temperature?
Chemistry
2 answers:
Hatshy [7]3 years ago
7 0

7.7 \times 10^{2} \; \text{K}.

<h3>Explanation</h3>

Units of each quantity:

  • <em>P</em> = 28 atm;
  • <em>V</em> = 0.045 L;
  • <em>n</em> = 0.020 mol;

Ideal gas constant:

R = 0.0820573 \;\text{L} \cdot \text{atm} \cdot \text{K}^{-1} \cdot \text{mol}^{-1}.

Apply the ideal gas law:

T = \dfrac{P \cdot V}{n \cdot R} = \dfrac{{\bf 28} \; \text{atm} \times {\bf 0.045} \;\text{L} }{{\bf 0.020}\; \text{mol} \times {\bf 0.0820573} \;\text{L} \cdot \text{atm} \cdot \text{K}^{-1} \cdot \text{mol}^{-1}} = {\bf 767.76} \; \text{K}.

All data given in this question come with two significant figures. Round the value of <em>T</em> to two significant figures:

T = 767.76 \;\text{K} = 7.7 \times 10^{2} \; \text{K}.

marta [7]3 years ago
7 0

Answer:

It is 770 k for plato and Edmentum when you round up 767.75 to 2 Significant Figures

Explanation:

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LuckyWell [14K]

Its tail helps it climb down the tall grasses and lets it swing from the grass like a monkey in a tree

Explanation:

7 0
2 years ago
Given the following balanced equation, determine the rate of reaction with respect to [SO2].
Gnoma [55]

Answer:

Rate = -1/2 Δ[SO<sub>2</sub>]/Δt

so its gonna be (in more simple terms) rate= -1/2Δ(SO2)/Δt

Explanation:

7 0
2 years ago
What mass of copper is deposited when a current of 10.0a is passed through a solution of copper(ii) nitrate for 30.6 seconds?
asambeis [7]
Data Given:

Time = t = 30.6 s

Current = I = 10 A

Faradays Constant = F = 96500

Chemical equivalent = e = 63.54/2 = 31.77 g

Amount Deposited = W = ?

Solution:
             According to Faraday's Law,

                                          W  =  I t e / F

Putting Values,
 
                            W  =  (10 A × 30.6 s × 31.77 g) ÷ 96500

                            W  =  0.100 g

Result:
           0.100 g of Cu
²⁺ is deposited.
3 0
3 years ago
Identify the only polyatomic ion below that is NOT an oxyanion. Your answer: A Cyanide B Nitrate C Hydroxide D Sulfate​
DochEvi [55]

Answer:

Cyanide

Explanation:

<em>Molecular Structure of Each Answer</em>

A:  CN-

B: NO3-

C: OH-

D: SO4 2-

As you can see, only A (Cyanide) is the only compound that does not contain oxygen, meaning it is NOT an oxyanion.

7 0
3 years ago
How many molecules of CBr4 are in 250 grams of CBr4
Kazeer [188]

Answer:- 4.54*10^2^3 molecules.

Solution:- The grams of tetrabromomethane are given and it asks to calculate the number of molecules.

It is a two step unit conversion problem. In the first step, grams are converted to moles on dividing the grams by molar mass.

In second step, the moles are converted to molecules on multiplying by Avogadro number.

Molar mass of CBr_4  = 12+4(79.9)  = 331.6 g per mol

let's make the set up using dimensional analysis:

250g(\frac{1mol}{331.6g})(\frac{6.022*10^2^3molecules}{1mol})

= 4.54*10^2^3 molecules

So, there will be 4.54*10^2^3 molecules in 250 grams of CBr_4 .


8 0
2 years ago
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