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fgiga [73]
2 years ago
7

A sample of gas has a pressure of 21 Pa at 30degF. What would its pressure be at 80degF? The volume of the gas remains constant.

Mathematics
1 answer:
lara [203]2 years ago
6 0

Answer:

23 Pa

Step-by-step explanation:

According to ideal gas law, PV = nRT.  If V is constant, then:

P/T = P/T

Remember that P and T are absolute.  So °F must be converted to either Rankine or Kelvin.

To convert °F to Rankine, add 459.67.

30°F + 459.67 = 489.67 R

80°F + 459.67 = 539.67 R

21 Pa / 489.67 R = P / 539.67 R

P = 23.1 Pa

Rounded to two significant figures, the pressure is 23 Pa.

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73. If 65% of x is 130, what is the value of x?<br>A. 84.5<br>B. 130<br>C. 165<br>D. 200<br>E. 260​
MrRissso [65]

Answer:

D) 200

Step-by-step explanation:

To find what x equals you have to use the expression:

is over of equals percent over 100

In this problem you are given the percent, 65%, and the is, 130.

So we are trying to find the of so you would substitute of with x.

So 130/x = 65/100

Now you would do Cross Product Property to find x.

So 130*100 = 13000

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6 0
3 years ago
What is the first term for an arithmetic sequence with a12 = 56 and a21=101?
Alenkinab [10]
The first term is -43.

Explanation:

an = a + (n - 1)d

a12 = a + 11d = 56, first equation
a21 = a + 20d = 101, second equation

Subtract the second equation from the first equation, cancelling +a and -a
11d - 20d = 56 - 101
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Subtitute d into the first equation
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a refers to the first term, hence the first term is -43.
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3 years ago
A factory produces 550 bottles of water in 25 minutes. How many bottles of water can it produce in 3 minutes?
vazorg [7]

Answer:

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Step-by-step explanation:

step 1: divide 550 by 25

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3 years ago
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