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Valentin [98]
2 years ago
9

PLS ANSWER!! ASAP!! 10 POINTS!!

Chemistry
1 answer:
andrew-mc [135]2 years ago
5 0

Answer:

D

Explanation:

I'm so sorry!! I got it wrong sorry!

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What layer of earths atmosphere is the layer next to the earth
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troposphere

Explanation:

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A balloon filled with helium occupies 21.0ft³ at 55.0°F. Find the temperature of the helium if the volume of the balloon decreas
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Answer:

Assuming pressure is held constant,the question reduces to a ratio and proportion type of question where;

At constant pressure,

21.0ft³-55.0°F

11.0fy³=11.0ft³/21.0ft³×55°F

The temperature is 28.809°F≈29°F

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If 89.6 joules of heat 20.0 grams of iron from 30.0 C to 40.0 C, what is the specific heat of the iron in J/g.C?
atroni [7]

Answer:

 

H = m c ΔT  

89.6 J = (20.0 g) × c × (40.0 - 30.0)°C  

Specific heat of iron, c = 89.6 / [20.0 × (40.0 - 30.0)] J/(g°C) = 0.448 J/(g°C)

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3 years ago
Express the following number in scientific notation. 0.53000 = _____
kakasveta [241]
Yes, it would be the last one as the zeros that appear after a non zero number are significant.
7 0
3 years ago
Read 2 more answers
A 2.00-L sample of was collected over water at a total pressure of 750. torr and 22 °C. When the was dried (water vapor removed)
9966 [12]

Answer : The vapor pressure of water at 22^oC is 1.01 atm.

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}

or,

P_1V_1=P_2V_2

where,

P_1 = initial pressure = ?

P_2 = final pressure = 750 torr = 0.987 atm    (1 atm = 760 torr)

V_1 = initial volume = 1.95 L

V_2 = final volume =  2.00 L

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

P_1\times 1.95L=0.987atm\times 2.00L

P_1=1.01atm

Therefore, the vapor pressure of water at 22^oC is 1.01 atm.

7 0
2 years ago
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