What is the role of an enzyme? a. speeds up biochemical reactions b. causes biochemical reactions c. is a product in biochemical reactions d. provides extra heat for biochemical reactions

Answers

Answer 1

Answer: A. But the best term to use is 'speeds up and biological reaction' - (in chemistry), and a catalyst 'speeds up a chemical reaction' - (in chemistry)

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Which of these statements is true about reaction rates is accurate? a. all chemical reactions occur at a slow rate.
b. all chemical reactions at the same rate.
c. all chemical reactions at a fast rate.
d. all chemical reactions occur at different rates.

Answers

all chemical reactions occur at different rates due to difference in their kinetic energy option D is right hope this helps

Hi there!

Analyzing This Question Correctly We Can conclude thatthe Most accurate and correct answer is D.

We Can conclude to this By using The collision theory.The Collision Theory states that in order for a reaction to proceed, the reactant particles must collide. The more successful collisions there are per unit of time, the faster the reaction will be.

Factors which can affect the rate of a reaction include:

⚛ concentration

⚛ temperature

⚛ particle size

⚛ catalysts

⚛ stirring rate

⚛ light intensity

For Example, By adding less Baking soda to Vinegar the less Co2(Carbon Dioxide) Will Be created.

By Adding More Baking Soda to vinegar, more Co2 Will Be created.

Hope This Has helped

--Adan M

Write these chemicals in order starting with the one that turns into gas the easiest. Naphtha, diesel, bitumen, petrol

Answers

naptha! hope i helped

The temperature at which a liquid becomes a solid is the: a. boiling point
b. density
c. freezing point
d. solubility

Answers

The answer is "c" because solidification or freezing is the term used for the process in which a liquid becomes a solid. Freezing is an exothermic process that also is an example of a phase transition

What is a chemical solution and what are the names of its components?

Answers

Answer:

A chemical solution is defined as a homogeneous mixture of two or more substances. There are two components of chemical solution that include solute and solvent.

Solute is the component that get dissolved in another substance and solvent is the substance that dissolve solute.

For example: carbon dioxide in water. Where carbon-dioxide is solute and water is solvent.

In clinical brachytherapy, the supervision of radio elements and dose interpretation are performed by the therapeutic ____________________ (two words).

Answers

Answer:

Radiation oncologist.

Explanation:

Cancer is one of the most deadly disease and half of the world population died due to cancer every year. Cancer might occur due to the mutation in the genes that control the cell cycle.

The oncologist may be defined as the individual that has specialized in the cancer and its treatment. The different radiation might use to kill the cancerous cell and the radio elements are administered in the drugs used during the chemotherapy.

Thus, the answer is radiation oncologist.

49 After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?(1) 3.0 h (3) 12 h(2) 9.6 h (4) 24 h

Answers

Answer:

The half life of the radioisotope is 12 hours.

Explanation:

Initial mass of the radioisotope = x

Final mass of the radioisotope = $(1)/(16)* x$ = 0.0625x

Half life of the radioisotope = $t_{(1)/(2)}$

Age of the radioisotope = t = 48 hours

Formula used :

$N=N_o* e^(-\lambda t)\n\n\lambda =\frac{0.693}{t_{(1)/(2)}}$

where,

$N_o$ = initial mass of isotope

N = mass of the parent isotope left after the time, (t)

$t_{(1)/(2)}$ = half life of the isotope

$\lambda$ = rate constant

$N=N_o* e^{-((0.693)/(t_(1/2)))* t}$

Now put all the given values in this formula, we get

$0.0625x=x* e^{-((0.693)/(t_(1/2)))* 48 h}$

$\ln(0.0625) * (1)/((-0.693* 48 h))=(1)/(t_(1/2))$

$t_(1/2) = 11.99 hours = 12 hours$

The half life of the radioisotope is 12 hours.

1/16 left would imply 4 half lives have passed (1/2 left = 1, 1/4 left = 2, 1/8 left = 3, 1/16 left = 4). So 4 half lives passed in 48 hours, meaning dividing 48 by 4 will give you the length of 1 half life. Which in this case is 12 hours.

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