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Harlamova29_29 [7]
3 years ago
5

Why do heated molecules rise? a Because they are less dense than the molecules around them b Because they are moving slower than

the other molecules c Because they are denser than the molecules around them
Chemistry
1 answer:
Volgvan3 years ago
7 0

Answer:

A because they are less dense than the molecules around them

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If the gas inside the flask is cooled so that its pressure is reduced from 797.3 torr to a value of 715.7 torr what will be the
nadezda [96]
The differential pressure is
797.9 - 715.7 = 82.2 torr = 138815.25 Pa
The height of the mercury in the open-end arm is calculated using
ΔP = ρgh
The density of mercury is 13560 kg/m3
The height of the mercury is
138815.25 Pa = 13560 kg/m3 (9.81 m/s2) h
h = 1.04 m
4 0
3 years ago
Which of the following procedures increases the average kinetic energy
Sever21 [200]

Answer:

Cooling Steam at 100 C to ice at 0 C

Explanation:

8 0
3 years ago
True or False: The ticketing area is more secure than the area beyond the security check point.
Natali [406]

The answer is false.

That is the ticketing area is more secure than the area beyond the security check point is false rather than the area beyond security check point is more safe than the ticketing area.

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5 0
3 years ago
What pressure (in atm) will a sample of o2 gas occupy at 100.0 ml, if o2 has a volume of 25.00 ml at 2.0 atm?
xeze [42]

Assuming that the O2 gas acts like an ideal gas, we find the following expression to be approximates of the behaviour of this gas:

<span>P V = n R T                   ---> 1</span>

where,

P = pressure exerted by the gas

V = volume occupied

n = number of moles

R = universal gas constant

T = absolute temperature

Further, we assume that the number of moles and the temperature are constant, hence reducing equation 1 into the form:

<span>P V = k                         ---> 2</span>

where k is a constant. Therefore we can equate two states:

P1 V1 = P2 V2

Since P1, V1 and V2 are given and we are to look for P2:

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<span>P2 = 0.5 atm</span>

8 0
3 years ago
Read 2 more answers
If the pH of a solution is 7.6, what is the pOH? A. 6.4 B. 8.4 C. 5.4 D. 7.4
maks197457 [2]

Answer:

6.4

 

Explanation:  pH

+

pOH

=

14

So if  

pH

=

7.6

then  

pOH

=

14

−

pH

=

6.4

Explanation:

Wrote this out spaced so it's more clear.

8 0
3 years ago
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