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Olin [163]
3 years ago
8

What is the equation of the line that passes through point (4,12) and has a y-intercept of -2?

Chemistry
1 answer:
AfilCa [17]3 years ago
6 0
The general formula of an equation is y=mx+b we are told that the y-intercept is -2 as such we have the following so far y=mx-2
to calculate the slope we do the following:
y=mx-2 \\ 12=m(4)-2 \\ 12=4m-2 \\ 14=4m \\ m= \frac{14}{4}
therefore the equation is
y= \frac{14}{4}x-2
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If 125 ml of o2 gas exerts a pressure of 1.0 atm inside a cylinder, what will the pressure be if the cylinder compressed the vol
Lelu [443]
<h2>Hello!</h2>

The answer is: The new pressure is 1.67 atm.

<h2>Why?</h2>

From the statement, we know that the temperature remains constant and the gas volume is changing, meaning that the new pressure will be different than the first pressure.

Since the temperature remains constant, we can calculate the new pressure using the Boyle's Law.

The Boyle's Law states that:

P_{1}V_{1}=P_{2}V_{2}

Where,  

P is the pressure of the gas.

V is the volume of the gas.

Then, the given information is:

V_{1}=125ml=0.125L\\P_{1}=1atm\\V_{2}=75ml=0.075L

Remember, 1 L is equal to 1000 mL.

So,

125mL*\frac{1L}{1000mL}=\frac{125mL*1L}{1000mL}=0.125L\\\\75mL*\frac{1L}{1000mL}=\frac{75mL*1L}{1000mL}=0.075L

So, calculating the new volume, we have:

P_{1}V_{1}=P_{2}V_{2}\\\\1atm*0.125L=P_{2}*0.075L\\\\P_{2}=\frac{1atm*0.125L}{0.075l}=1.67atm

Hence, the new pressure is 1.67 atm.

Have a nice day!

7 0
3 years ago
I have a question can someone answer these questions for me please?
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Explanation:

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3 years ago
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