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3 years ago

PLEASE ANSWERRRRRRRRRRR

Chemistry

1 answer:

andrew11 [14]3 years ago

5 0

Answer:

B if I remember right.

Explanation:

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Helpp plssssss :) .....

MaRussiya [10]

B is right yuh yuh yuh yuh

4 0

2 years ago

When a solution of AgNO3 is mixed with a solution of NaBr (multiple options could be correct):

alex41 [277]

Answer:

After a few minutes pass, the concentration of Ag+ and Br- will be lower than when the two solutions were first mixed.

AgBr precipitate will spontaneously form.

Explanation:

After the net ionic equation AgBr forms

7 0

3 years ago

Question 2

andrezito [222]

Answer:

A. Peroxide breaking down into water and oxygen

Explanation:

Generally when it comes to changes, there are physical and chemical changes. In physical changes, there are no new substances been formed, however in chemical change new substances are formed.

A. Peroxide breaking down into water and oxygen

This is a chemical change.

B . Bubbles forming when a pot of water is heated

This is a physical change

C. A pair of jeans soaked in water drying after hanging outside

This is a physical change

D . A block of ice decreasing in size due to a change in temperature

This is a physical change.

Only option A is different from the rest,hence this is the answer.

3 0

3 years ago

Help asap. picture below.

Rashid [163]

Answer:

C. If a solar cell breaks, it releases chemicals and can harm humans.

Explanation:

Hope this helped! :)

3 0

2 years ago

what is the volume of the air in a balloon that occupies 0.730 L at 28.0 c if the temperature is lowered to 0.00 C

svetoff [14.1K]

Answer:

The volume of the air is 0.662 L

Explanation:

Charles's Law is a gas law that relates the volume and temperature of a certain amount of gas at constant pressure. This law says that for a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement they have. the gas molecules. This is represented by the quotient that exists between volume and temperature will always have the same value:

$\frac{V}{T}=k$

If you have a certain volume of gas V1 that is at a temperature T1 at the beginning of the experiment and several the volume of gas to a new value V2, then the temperature will change to T2, and it will be true:

$\frac{V1}{T1}=\frac{V2}{T2}$

In this case:

V1= 0.730 L
T1= 28 °C= 301 °K (0°C= 273°K)
V2= ?
T2= 0°C= 273 °K

Replacing:

$\frac{0.730 L}{301K}=\frac{V2}{273K}$

Solving:

$V2=273K*\frac{0.730L}{301K}$

V2=0.662 L

The volume of the air is 0.662 L

6 0

2 years ago