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wel
3 years ago
13

Why might a scientist repeat an experiment if she did not make a mistake in the first one? A) Scientists who repeat experiments

make the most money. B) It helps ensure the results are consistent and repeatable. C) Repeating ensures the expected results match the hypothesis. D) It helps find portions that can be skipped with the same results.
Chemistry
1 answer:
9966 [12]3 years ago
3 0

Answer:

The correct answer is B) it helps to ensure the result are consistent and repeatable.

Explanation:

Scientist generally repeat an experiment if he or she did not make a mistake in the first one to compare the results of two experiment, if there is no difference in the result or values obtainted from the observation of two experiment. he or she become sure that experiment was done in a right way because if there is some error made when experiment was carried out then the result of two same experiment would be different.

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Komok [63]

Answer:

C2H5OH +

3

O2 -->

2

CO2 +

3

H2O

(COMBUSTION REACTION)

Explanation:

I hope this helps :)

8 0
2 years ago
All cells in living organisms undergo cellular respiration. The chemical reaction for cellular respiration is stated below. (Glu
Ne4ueva [31]

Answer : The total mass of carbon dioxide and water produced will be, 65.7 grams.

Explanation :

Law of conservation of mass : It states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The balanced chemical reaction will be,

C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O

According to the law of conservation of mass,

Total mass of reactant side = Total mass of product side

Total mass of C_6H_{12}O_6+6O_2 = Total mass of 6CO_2+6H_2O

As we are given :

Total mass of C_6H_{12}O_6+6O_2 = 65.7 grams

So,

65.7 grams = Total mass of 6CO_2+6H_2O

Therefore, the total mass of carbon dioxide and water produced will be, 65.7 grams.

4 0
3 years ago
Please help me I will give you the brain thing and extra points.
ruslelena [56]
Balanced is the answer
4 0
3 years ago
Read 2 more answers
Water (2350 g ) is heated until it just begins to boil. If the water absorbs 5.83×105 J of heat in the process, what was the ini
Eva8 [605]

Answer:

40.7062 °C  

Explanation:

Let the initial temperature = x °C

Boiling temperature of water = 100 °C

Using,

Q = m C ×ΔT

Where,  

Q is the heat absorbed in the temperature change from x °C to 100 °C.

C gas is the specific heat of the water = 4.184 J/g  °C

m is the mass of water

ΔT = (100 - x) °C  

Given,

Mass = 2350 g

Q = 5.83 × 10⁵ J

Applying the values as:

Q = m C ×ΔT

5.83 × 10⁵ = 2350 × 4.184 × (100 - x)

<u>x, Initial temperature = 40.7062 °C  </u>

3 0
3 years ago
If 32 L of hydrogen react with excess oxygen at STP to form water, how much energy will be released?
Fudgin [204]

Answer:

??????????????????

Explanation:

4 0
2 years ago
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