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Elodia [21]
3 years ago
13

6 Which of the following would provide the best evidence that air is made of matter? A Making a small hole in a tire and measuri

ng the amount of time it takes for it to become flat B Comparing the mass and volume of an empty balloon to the mass and volume of an inflated balloon C Measuring the temperature of the air in several rooms of varying sizes D Finding the volume of the air between marbles in a jar by pouring water over them​

Chemistry
1 answer:
amm18123 years ago
3 0
Correct answer is B
Y welcome
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A chemist plans to use 435.0 grams of ammonium nitrate ion a reaction. How many moles of the compound is this?
AURORKA [14]
Ammonium Nitrate has the formula NH4NO3, and has a formula weight of 80.043 grams/mole. We can convert the amount in the problem to moles using this conversion factor. Divide 435 by 80.043 to find the number of moles.

435/80.043 = 5.435

This amount of Ammonium Nitrate contains 5.44 moles of substance, adjusted for significant figures.
4 0
3 years ago
A balloon is filled with 30L of helium gas at 1atm.What is the volume when balloon rises to an attitude where the pressure is on
Harrizon [31]

Answer:

V_2=120L

Explanation:

Hello!

In this case, since Helium is undergoing a volume-pressure change, according the Boyle's law, we infer the following equation is used:

P_1V_1=P_2V_2

Thus, since we are not given the volume at 0.25 atm, we can solve for V2 to do so:

V_2=\frac{P_1V_1}{P_2}

Thus, we plug in to obtain:

V_2=\frac{1atm*30L}{0.25atm}=120L

Best regards!

7 0
3 years ago
25 POINTS help! i need this question to be answered quickly!
sergey [27]

Answer:

cell membrane

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8 0
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Coefficients to lowest possible<br> ratio, if necessary.
dangina [55]
Coefficients with the lowest ratio indicate the relative amounts of substances in a reaction. For example, chemical reaction: 2H₂ + O₂ → 2H₂O
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How many grams are in8.2'10^22 molecules of N2i6​
maks197457 [2]

Explanation:

Hope the picture with the working out helps :)

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