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fgiga [73]
3 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]3 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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Points a,b and c are collinear and in that order. If AC=3x+3, AB=-1+2x, and Bc=11, find x and AC
zimovet [89]

The answers are:

AC = AB + BC

3x+3 = -1+2x+11

3x-2x = -1-3+11

x = 7


AC = 3x+3                   x = 7

AC = 3x7+3

AC = 24


Hope it helps!


4 0
3 years ago
Four times the amount of money in my bank account plus $200 is still two
ioda

Answer:

$700

Step-by-step explanation:

So, I like to extract the information we know and form it into an equation.

So we know that after multiplying what you have in the bank by 4, then add 200 dollars you get two thousand dollars less than a fourth of what's in your dad's bank account.

Your dad has $20,000 in the bank.

Before we write the equation let's find what two thousand less than a fourth of 20,000 is.

20,000/4 = 5,000

Now, 5,000 - 2,000 = 3,000

Ok let's say x is how much money you have

So:

4x + 200 = 3,000

we can isolate the variable by subtracting 200 from both sides

4x = 2,800

then we can divide by 4 on each side

x = 700

so you have $700 in the bank

4 0
3 years ago
HELP ME PLEASE AWARDING 30 POINTSSSSS
KengaRu [80]

Answer:

Step-by-step explanation:

6 0
3 years ago
Find the equivalent expression for 3+2[2p+4t]
Sauron [17]

Answer:

3 + 4p + 8t

Step-by-step explanation:

3+2[2p+4t]

Distribute

3 + 4p + 8t

There are no like terms to combine

7 0
3 years ago
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There's an app called photomath that would be useful for these kinds of problems!
6 0
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