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3 years ago

A scientific model must make a testable prediction. a scientific model must make a testable prediction.

1 answer:

8 0

It is true because Scientists will create models (simplified views of reality) to help them focus on the basic fundamental processes.

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Unit Test

guajiro [1.7K]

Answer:

Heat flows from faster molecules to slower molecules when they collide.

Explanation:

logics

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4 years ago

A positively charged ion is called a cation which means there are more protons in the atom compared to the number of protons in

Lelechka [254]

False False False False False False Ф

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4 years ago

URGENT HELP

sdas [7]

The answer is option C 7.60 M

7 0

3 years ago

12. Which atoms or group of atoms make up the functional group of ethanol (CH3CH2OH)?

Montano1993 [528]

Answer:

Option A. the hydroxyl group (-OH)

Explanation:

Ethanol, CH₃CH₂OH belongs to the class of organic compound called alkanol.

They have general formula as R–OH

Where

R => is an alkyl group

OH => is the hydroxyl group

The hydroxyl group (OH) is the functional group of the alkanol (alcohol)

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3 years ago

Allison needs 18 liters of a 5% saline solution. She has a 1% solution and a 10% solution available. How many liters of the 1% s

kolezko [41]

Answer:

10 liters of the 1% solution and 8 liters of the 10% solution she should mix to make the 5% solution.

Explanation:

Let the volume of 1% acid solution used to make the mixture = x L

So, the volume of 10% acid solution used to make the mixture = y L

Total volume of the mixture = x + y = 18 L .................. (1)

For 1% acid solution:

C₁ = 1% , V₁ = x L

For 10% acid solution :

C₂ = 10% , V₂ = y L

For the resultant solution of sulfuric acid:

C₃ = 5% , V₃ = 18 L

Using

C₁V₁ + C₂V₂ = C₃V₃

1×x + 10×y = 5×18

So,

x + 10y = 90 .................. (2)

Solving 1 and 2 we get,

x = 10 L

y = 8 L

Thus,

10 liters of the 1% solution and 8 liters of the 10% solution she should mix to make the 5% solution.

7 0

3 years ago