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Mama L [17]
3 years ago
12

There are many sources of air pollution in the united states and around the world. Some are natural sources, and other come from

human activities. Which of these examples is a natural source of air pollution?
A.) car exhaust fumes
B.) methane gas from cow manure
C.) dust from fertilizers used on crops
D.) smoke from the burning of fossil fuels
Chemistry
1 answer:
KATRIN_1 [288]3 years ago
4 0
B should be your best guess
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Positive feedback is when the change caused by the stimulus is A )decreased B) changes constantly C) nonexistent D) Increased HE
polet [3.4K]

Answer:

c) nonexistent

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3 years ago
A sample of a gas at 25°C has a volume of 150 mL when its pressure is 0.947 atm. What will the temperature of the gas be at a pr
sertanlavr [38]

Answer: The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is 25.16^0C

Explanation:

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.947 atm

P_2 = final pressure of gas = 0.987 atm

V_1 = initial volume of gas = 150 ml

V_2 = final volume of gas = 144 ml    

T_1 = initial temperature of gas = 25^0C=(25+273.15)K=298.15K

T_2 = final temperature of gas = ?

Now put all the given values in the above equation, we get:

\frac{0.947\times 150}{298.15}=\frac{0.987\times 144}{T_2}

T_2=298.31K=(298.31-273.15)^0C=25.16^0C

The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is 25.16^0C

4 0
2 years ago
Which of the following are the starting substances in photosynthesis?
Misha Larkins [42]

A: water and carbon dioxide.

3 0
3 years ago
Read 2 more answers
OCAS GAME
makkiz [27]

ok so this was really confusing, but i think i know the answer. D. ...hairy and ancient hermit crabs and swift, darting minnows and sometimes a

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7 0
3 years ago
Name NaCl; is it a) molecular b) ionic c) elemental d) strong electrolyte, e) weak electrolyte f) non-electrolyte g) acid h) bas
ioda

Answer:

i)salt

Explanation:

NaCl is a neutral salt formed by reacting a strong acid HCl and a strong base NaOH. It is also ionic in nature.

It is also called common salt or table salt as it is used as edible in daily our life.

4 0
3 years ago
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