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DochEvi [55]
3 years ago
7

Which of the following are the requirements when creating a hypothesis for an experiment? Check ALL that apply. A: A hypothesis

is base on knowledge and research. B: A hypothesis is an idea about the solution to a problem. C: A hypothesis is created after an experiment is completed. D: A hypothesis should make a claim about how two factors are related.
Chemistry
2 answers:
ruslelena [56]3 years ago
6 0
The answer is be because a hypothesis is just a educated guess or a theory
kkurt [141]3 years ago
5 0

Answer:

You're answer would be B.

Explanation:

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7 0
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Whuch expression is equal to the number of grams in 2.43 kg
schepotkina [342]
2.43*1000. 

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If 5.12 liters of a 2.75 M phosphoric acid is neutralized by magnesium hydroxide solution of 4.00 M.
Tresset [83]

Answer:

5.28 L

Explanation:

Step 1:

Data obtained from the question.

Volume of acid (Va) = 5.12L

Molarity of acid (Ma) = 2.75M

Molarity of base (Mb) = 4M

Volume of base (Vb) =.?

Step 2:

The balanced equation for the reaction

2H3PO4 + 3Mg(OH)2 → Mg3(PO4)2 + 6H2O

From the balanced equation above,

Mole ratio of the acid (nA) = 2

Mole ratio of the base (nB) = 3

Step 3:

Determination of the volume of the base.

This is illustrated below:

MaVa/MbVb = nA/nB

2.75 x 5.12 / 4 x Vb = 2/3

Cross multiply

4 x 2 x Vb = 2.75 x 5.12 x 3

Divide both side by 4 x 2

Vb = (2.75 x 5.12 x 3)/(4 x 2)

Vb = 5.28 L

Therefore, the volume of the base is 5.28 L

8 0
3 years ago
Read 2 more answers
3. Mr. Hill has 27 students in his class
stich3 [128]
Just dived both numbers by two
4 0
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In a double-blind test, the non-control group receives a
Aleksandr [31]

Answer:

Hi There! I'm new so I hope I get This Right! ^^

Explanation:

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happy To Help! ^^

6 0
3 years ago
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