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kvv77 [185]
2 years ago
5

How can magnetic force be exerted on objects?

Chemistry
1 answer:
just olya [345]2 years ago
8 0
I think the answer is : 1
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A 400 mL sample of hydrogen gas is collected over water at 20°C and 760 torr the vapor pressure of water at 20°C is 17.5 torr. w
o-na [289]

Answer:

V2 = 17371.43ml

Explanation:

We use Boyles laws

since temperature is constant

P1V1=P2V2

760 x 400 = 17.5 x V2

304000 = 17.5 x V2

V2 = 304000/17.5

V2 = 17371.43ml

4 0
3 years ago
Which mineral group is composed of compounds that contain atoms of sulfur and one or more metals?
Oksi-84 [34.3K]

Answer:

The answer to your questions is: C. Sulfides

Explanation:

A. Phosphates  these compounds do not have sulphur, they are composed by phosphate and oxygen, So this answer is wrong.

B. Sulfates  are formed by sulphur and oxygen, not for a metal, then this is not the right answer.

C. Sulfides  are molecules formed by a metal and sulphur, this is the anwser to the question.

D. Silicates are formed by sillicon and oxygen, this option is incorrect.

8 0
3 years ago
Why aluminium foils are use to wrap food items
nekit [7.7K]
Because they insulate either the heat or the coolness within the food item. But keep in mind- when it comes to electricity aluminum isn’t an insulator.
3 0
3 years ago
Read 2 more answers
During which phase change does the arrangement of water molecules become more orderly?
KatRina [158]
The phase change in which the water molecules become most orderly is the freezing. This is the process of changing water as liquid to its solidified form. The process of freezing is an exothermic which means that for this to occur, heat should be removed from the system. 
3 0
3 years ago
Read 2 more answers
sample of atmospheric gas collected at an industrial site is stored in a 250 mL amber glass bottle that has a pressure of 1.02 a
Nady [450]

Answer:- New pressure is 0.942 atm.

Solution:- The volume of the glass bottle would remain constant here and the pressure will change with the temperature.

Pressure is directly proportional to the kelvin temperature. The equation used here is:

P_1T_2=P_2T_1

Where, T_1 and T_2 are initial and final temperatures, P_1 and P_2 are initial and final pressures.

T_1 = 20.3 + 273.15 = 293.45 K

T_2 = -2.0 + 273.15 = 271.15 K

P_1 = 1.02 atm

T_2  = ?

Let's plug in the values in the equation and solve it for final pressure.

1.02atm(271.15K)=P_2(293.45K)

P_2=\frac{1.02atm*271.15K}{293.45K}

P_2 = 0.942 atm

So, the new pressure of the jar is 0.942 atm.


5 0
3 years ago
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