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elena-s [515]
4 years ago
12

What is the percentage of propane in natural gas??

Chemistry
1 answer:
love history [14]4 years ago
4 0
It’s a gas which causes pollution which make people cough and die
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What is the approximate age of the oldest fossils of early human ancestors?
Vesna [10]

Answer:approx 300,000 years ago

Explanation:

Fossils attributed to H. sapiens, along with stone tools, dated to approximately 300,000 years ago, found at Jebel Irhoud, Morocco yield the earliest fossil evidence for anatomically modern Homo sapiens

7 0
3 years ago
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Classify each as either matter or not matter
Leto [7]

Answer:

matter

your breath fog steam oxygen helium piece of paper

Explanation:

matter,matter is made up of atoms ,atoms is in practically everything

5 0
3 years ago
Will a real gas ever reach absolute zero? Will an ideal gas ever reach absolute zero? Why or why not? Compose a report that answ
Zolol [24]

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high.

<h3>What is the absolute zero?</h3>

The absolute zero is the temperature at which the movement of all the gas molecules is theoretically believed to cease. At the absolute zero, gas molecules remain at fixed positions because according to the third law of thermodynamics, the entropy of a perfectly ordered system is zero.

It is impossible to reach absolute zero because the magnitude of work that is required to remove energy from a gas in order to attain the absolute zero is so high such that it is impractical to attain the absolute zero.

Learn more about absolute zero:brainly.com/question/79835

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5 0
2 years ago
Easy Question! Chemistry - Please help! I give thanks - It's the picture - Question 2
Katena32 [7]
Volume of a cylinder = \pi r^{2} h
r = \frac{D}{2}
  = \frac{8.4cm}{2}
  = 4.2cm

h = 14.5cm
\pi = 3.14

V= (3.14) * ((4.2cm)^{2})*  14.5cm
  = 803.1 cm^{3}
7 0
3 years ago
Appositives a force of 2 N to the left and 3 N to the right which is true of the Box motion
nexus9112 [7]
1N to the right       s s  s s s s s s s  s s s s s s s s s s s s s  s s s s s s s s s s s s  ss  s s s                                                                                                                                             

3 0
3 years ago
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