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Aneli [31]
3 years ago
7

A student in a chemistry lab is conducting an experiment using chemicals. Several violations were observed by the instructor. Wh

ich of the following methods below would best prevent a contamination of chemicals in the eyes?
Chemistry
1 answer:
Readme [11.4K]3 years ago
6 0

Answer:

I would suggest wearing safety glasses as it minimizes the chance of harmful chemicals entering the eyes

Explanation:

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In order to expand agriculture and urban areas to meet increased demand for growing populations, water supplies often have to be
VMariaS [17]

answer:

lets say we have a big lake with a lot of animals and you want to move the water to somewhere else. A lot of animals and fish, frogs will have to find a new home!

7 0
3 years ago
Why is the piece of coal layered?
marysya [2.9K]

Answer:

Coal is layered because it is a type of sedimentary rock

Explanation:

3 0
3 years ago
Anh measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18 degrees celsius.
Hitman42 [59]

As the temperature increases, B) the molecules started moving faster.

Explanation:

The temperature of a substance is a measure of the average kinetic energy of the particles in a substance. In particular, it can be found that the temperature is directly proportional to the average kinetic energy of the particles:

T\propto KE

The kinetic energy of a particle is given by

KE=\frac{1}{2}mv^2

where

m is the mass of the particle

v is its speed

This means that the higher the temperature of a substance, the greater the speed of the particles in the substance.

Therefore, if we apply this concept to this problem, we infer that as the temperature of the water in the pond gets higher, the speed of the molecules inside the water increases, which means that the molecules are moving faster.

Therefore, the correct answer is

B) the molecules started moving faster.

Learn more about temperature:

brainly.com/question/1603430

brainly.com/question/4370740

#LearnwithBrainly

3 0
3 years ago
A solution is saturated in CO2 gas and KNO3 at room temperature. What happens when the solution is warmed to 75°C?
nignag [31]

Answer:

gaseous CO2 bubbles out of the solution

Explanation:

We already know that the dissolution of a gas in water is exothermic. Hence, when the temperature of a solution containing a gas is increased, the solubility of the gas decreases and the gas bubbles out of the solution.

Similarly, the dissolution of KNO3 in water is endothermic. This implies that the solubility of the solid increases with increasing temperature.

Thus the solid becomes more soluble at 75°.

6 0
3 years ago
2 Points
pishuonlain [190]

Answer:

B

Explanation:

Boyle was known for rejecting Aristotle's theory basing it on the four elements (earth, air, fire, water).

4 0
3 years ago
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