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sukhopar [10]
3 years ago
5

Which quantity does a light-year measure? A) distance B) speed C) time D) volume

Chemistry
2 answers:
tatuchka [14]3 years ago
6 0

Answer:

speed

Explanation:

Olegator [25]3 years ago
3 0

Answer:

distance

Explanation:

a light year is the distance light travels in a year. its a way to describe incredibly large distances as you could imagine.

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A 0.100 mile sample of gas is at a temperature of 85.0 degrees C and a volume of 3.47 L. What is the pressure of the gas( in mm
vladimir1956 [14]

Answer: 64.6 mmHg

Explanation:

Given that:

Volume of gas V = 3.47L

(since 1 liter = 1dm3

3.47L = 3.47dm3)

Temperature T = 85.0°C

Convert Celsius to Kelvin

(85.0°C + 273 = 358K)

Pressure P = ?

Number of moles of gas N = 0.100 mole

Note that Molar gas constant R is a constant with a value of 0.0082 ATM dm3 K-1 mol-1

Then, apply ideal gas equation

pV = nRT

p x 3.47dm3 = 0.10 x (0.0082 atm dm3 K-1 mol-1 x 358K)

p x 3.47dm3 = 0.29 atm dm3

p = (0.29 atm dm3 / 3.47 dm3)

p = 0.085 atm

Recall that pressure of the gas is required in mm hg, so convert 0.085 atm to mm Hg

If 1 atm = 760 mm Hg

0.085atm = 0.085 x 760

= 64.6 mm Hg

Thus, the pressure of the gas is 64.6 mm hg

6 0
3 years ago
Which career field is an applied science?<br><br> Which hypothesis is testable?
VashaNatasha [74]

Chemists, biologist, pharmacist, medical researcher ect…

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A container of gas has a volume of 140.0 cm3 at a temperature of 27.0°C. If the
Vitek1552 [10]

Answer:

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Explanation:

To get the answer, you divide 140 by 27 to get 5.185 (.185 repeating). Then, you multiply 5.185 (.185 repeating) by 55 and get 285.185 (.185 repeating) cm^3. Please use ^ next time to indicate exponents.

8 0
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What is the difference between a scientific theory and an opinion?
Sergio039 [100]

Answer:

An opinion is a statement describing a personal belief or thought that cannot be tested (or has not been tested) and is unsupported by evidence. ... Theories are not described as true or right, but as the best-supported explanation of the world based on evidence.

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If the density of lead is 11.34g/.what is the density in kg/l
solong [7]

Answer:

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