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1 year ago

Questions and answers about isotopes grade 8 I need this for a PowerPoint exam projects

Chemistry

1 answer:

DanielleElmas [232]1 year ago

3 0

Answer:

Question: A patient is diagnosed with a damage in the thyroid gland.

Which isotope is used to treat the patient?

Option:

A. Copper-64

B. Cobalt-60

C. Carbon-14

D. Iodine-131

Correct answer : D. Iodine-131

Question: Give the definition of isotopes.

Answer : Isotopes is the atoms of elements with the same proton number but different number of neutrons.

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Friends can __________.

inn [45]

D) All of the above ..

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2 years ago

Read 2 more answers

Explain how to calculate the number of grams in 5.50 x 1022 atoms.

Neporo4naja [7]

Answer:

See below

Explanation:

From periodic table, find Mole Weight of the element in question

this is the grams of the element in Avagadro's Number (6.022 x 10^23) of atoms

(5.50 x 10^22) / (6.022 x 10^23) x mole weight = grams

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1 year ago

In which of the following cases will the LEAST time be required to arrive at equilibrium? K below refers to the equilibrium cons

mylen [45]

Answer: Option (4) is the correct answer.

Explanation:

It is known that equilibrium constant is represented as follows for any general reaction.

$A + B \rightarrow C + D$

K = $\frac{[C][D]}{[A][B]}$

As equilibrium constant is directly proportional to the concentration of products so more is the value of equilibrium constant more will be the number of products formed.

As a result, more is the time taken by the reaction to reach towards equilibrium. Whereas smaller is the value of equilibrium constant more rapidly it will reach towards the equilibrium.

Thus, we can conclude that cases where K is a very small number will require the LEAST time to arrive at equilibrium.

8 0

2 years ago

Tia has a sample of pure gold (Au). She weighed the sample and the result was 62.4 grams. Tia wants to determine the number of a

Marta_Voda [28]

I hope you are able to find your answer through the guidance of this site as I have yet to cover this topic in chemistry: http://scientifictutor.org/1021/chem-how-to-convert-between-grams-and-molecules/

7 0

2 years ago

Which of the following statements correctly describes what happens in all chemical reactions?

azamat

Answer:

Bonds between atoms are broken/ or new bonds are formed

Explanation:

Due to chemical changes.

4 0

2 years ago