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mariarad [96]
3 years ago
12

Which of the following is NOT an example of pseudoscience?

Chemistry
2 answers:
grandymaker [24]3 years ago
7 0
Vaccines is the answer
rewona [7]3 years ago
6 0

Answer:

I think its vaccines

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At 1000°C, cyclobutane (C4H8) decomposes in a first-order reaction, with the very high rate constant of 79 1/s, to two molecules
leva [86]

Explanation:

It is known that for first order reaction, the equation is as follows.

           t = \frac{2.303}{K} log \frac{[C_{4}H_{8}]_{o}}{[C_{4}H_{8}]_{t}}

    t = ?,        K = rate constant = 79 1/s

Initial conc. of C_{4}H_{8} = 1.68

Decompose amount of C_{4}H_{8} = 52% of 1.68

                                                   = \frac{52}{100} \times 1.68

                                                   = 0.8736

                                                   = 0.87

Now, [C_{4}H_{8}]_{t} = (1.68 - 0.87)

                         = 0.81

Therefore, calculate the value of t as follows.

               t = \frac{2.303}{K} log \frac{[C_{4}H_{8}]_{o}}{[C_{4}H_{8}]_{t}}

                  = \frac{2.303}{79 s^{-1}} log \frac{1.68}{0.81}

                  = \frac{2.303}{79 s^{-1}} \times 0.316

                  = 9.212 \times 10^{-3} s

                  = 0.00921 s

Thus, we can conclude that 0.00921 s will be taken for 52% of the cyclobutane to decompose.

7 0
3 years ago
What is -2/3÷(1 1/4)
IRISSAK [1]

Answer:

to simplify, its -0.53

4 0
3 years ago
The digestive tract converts food into materials and energy. True False
dolphi86 [110]

Answer:

true

Explanation:

The digestive tract is made up of organs that food and liquids travel through when they are swallowed, digested, absorbed, and leave the body as feces. These include the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus.

4 0
4 years ago
1.11 grams divided by 16.04 grams = how many moles?
Sever21 [200]
1.14912614 x 10^-25 moles would be your answer
4 0
4 years ago
Read 2 more answers
Which of the following is NOT an example of a chemical reaction?
Anettt [7]

Answer: D

Explanation:

because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can

4 0
3 years ago
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