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nirvana33 [79]
1 year ago
5

suppose you wanted to compare two different stain removers to learn which one was better at removing food stains from clothing.

In your test, which variable would you need to control ?
Chemistry
1 answer:
Dovator [93]1 year ago
8 0

Answer:

The amount/type of stain

Explanation:

You would want to ensure that the stain was the same in both samples.  

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When an electron falls from an excited state to ground state, is energy released or absorbed?
strojnjashka [21]

Answer:

Energy is released.

Explanation:

When an electron absorbs energy, it moves up into an excited state. When it releases energy, it will return to the ground state.

5 0
3 years ago
Which phrase describes conduction?
Akimi4 [234]

Answer:

Transfer of heat between two objects that are touching.

Explanation:

Conduction is the process by which heat is transferred from one object to another object that is touching and has different temperatures.

Eg: We can use a hot water pack to warm our back. Or While cooking we can feel the conduction process when heat process from the bottom of the pan to the top of the pan

7 0
2 years ago
Read 2 more answers
A 20 ounce bottle of soda provides a total of 300. calories. how many kilojoules are in the soda
Yuri [45]

The ratio which denotes the relation between the two different units is said to conversion factors.

According to conversion factors, the relation between calorie and kilojoule is given as, one Calorie is equal to 4.184 kJ.

1 Cal = 4.184 kJ

Now, according to above relation, convert 300 calories into kilojoules.

300 calories =300 Cal\times \frac{4.184 kJ}{1 Cal}

= 1255.2 kJ

\simeq 1255 kJ

Thus, kilojoules present in soda is equal to 1255 kJ

6 0
3 years ago
Read 2 more answers
The world's deserts are typically found at 30°N and 30°S latitudes because of ________. the circulation around the Ferrel cells
anygoal [31]

Answer:

The world’s hot deserts are located between 15° and 30° north or south of the equator, where the air is subsiding or sinking air

Explanation:

Hope this helps!

6 0
2 years ago
Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature. *
docker41 [41]

\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}

Actually Welcome to the Concept of the Chemical bonds.

Due to the presence of dipole-dipole forces, polar covalent molecules like water tend to be _____ at room temperature.

The answer is Liquids

Water tends to be liquids at the room temperature.

3 0
3 years ago
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