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Evgen [1.6K]
2 years ago
7

What is matter ????????

Chemistry
2 answers:
choli [55]2 years ago
6 0
Matter is size,color,texture,shape.but your name is not matter.
Debora [2.8K]2 years ago
4 0
Matter is everything and everything is made of matter, everything physical at least
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Calculate the number of moles in the 2.1-L volume of air in the lungs of the average person. Note that the air is at 37.0ºC (bod
adelina 88 [10]
Answer: 0.0826mol

PV=nRT
n=PV/RT
n=(1atm)(2.1L)/(310K)(0.082057L*atm/mol*K)=0.0826mol
7 0
3 years ago
Find the volume of a gas at STP, if its volume is 80.0 mL at 109 kPa and -12.5°C.​
exis [7]

Answer:

= 913.84 mL

Explanation:

Using the combined gas laws

P1V1/T1 = P2V2/T2

At standard temperature and pressure. the pressure is 10 kPa, while the temperature is 273 K.

V1 = 80.0 mL

P1 = 109 kPa

T1 = -12.5 + 273 = 260.5 K

P2 = 10 kPa

V2 = ?

T2 = 273 K

Therefore;

V2 = P1V1T2/P2T1

     = (109 kPa × 80 mL × 273 K)/(10 kPa× 260.5 K)

     <u>= 913.84 mL</u>

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3 years ago
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Which is not a name to describe global winds A) Polar Easterlies B) Prevailing Westerlies C) Trade Winds D) Tropical Northerlies
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D Tropical northerlies
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Also, every drop of water that we use continues through the water cycle. Stuff we put down the drain ends up in someone or something else's water. We can help protect the quality of our planet's freshwater by using it more wisely.
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2 years ago
Why is large-scale nuclear fission a rare phenomenon on Earth? A. There isn't enough energy to start a chain reaction in nature.
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The answer is; C

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