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Citrus2011 [14]
3 years ago
6

A scientist makes several observations, develops a question, researches what is known about the question, forms a hypothesis, an

d performs a series of experiments to test her hypothesis. The results of her experiment suggest that her hypothesis was not supported. Which of the following statements must be true regarding this scenario?
A scientist makes several observations, develops a question, researches what is known about the question, forms a hypothesis, and performs a series of experiments to test her hypothesis. The results of her experiment suggest that her hypothesis was not supported. Which of the following statements must be true regarding this scenario?

Question 1 options:

The scientist has wasted her time on useless experiments.


The scientist should hide the results of her experiments.


The scientist has revealed flaws in several other theories.


The scientist can use her results to make and test a new hypothesis.
Chemistry
1 answer:
Alex73 [517]3 years ago
8 0
The scientist should make a new hypothesis and do a new experiment! That is what I say!
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How many grams of aluminum is produced when 82.4 grams of aluminum chloride
yKpoI14uk [10]

Answer:

16.6 g of Al are produced in the reaction of 82.4 g of AlCl₃

Explanation:

Let's see the decomposition reaction:

2AlCl₃ →  2Al  + 3Cl₂

2 moles of aluminum chloride decompose to 2 moles of solid Al and 3 moles of chlorine gas.

We determine the moles of salt:

82.4 g . 1mol/ 133.34g = 0.618 moles

Ratio is 2:2. 2 moles of salt, can produce 2 moles of Al

Then, 0.618 moles of salt must produce 0.618 moles of Al.

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The reaction A(B) = 2B(g) has an equilibrium constant of K = 0.045. What is the equilibrium constant for the reaction B(g) =1/2A
Mamont248 [21]

Answer:

The  K_c for the reaction B(g) = \frac{1}{2}A will be 4.69.

Explanation:

The given equation is A(B) = 2B(g)

to evaluate equilibrium constant for B(g) = \frac{1}{2}A

            K_c=[B]^2[A]

                 = 0.045

The reverse will be 2B\leftrightharpoons A

Then,      K_c = \frac{[A]}{[B]^2}

                    =  \frac{1}{0.045}

                    = 22m^{-1}

The equilibrium constant for B(g) = \frac{1}{2}A will be

               K_c = \sqrt{K_c}

                    =\sqrt{22}

                    = 4.69

Therefore, K_c for the reaction B(g) = \frac{1}{2}A will be 4.69.

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