Molecules in all organisms are composed in part of radioactive carbon-14. Which statement best explains the presence of carbon-14 in organisms?a. The radioactive isotope reacts in the same way as stable isotopes in the nuclear reactions in the body.
b. The radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body.
c. The radioactive isotope reacts faster than stable isotopes in the nuclear reactions in the body.
d. The radioactive isotope reacts faster than stable isotopes in the chemical reactions in the body.

Answers

Answer 1

Answer: I think the correct answer from the choices listed above would be option B. The statement that best describes the presence of carbon-14 in organisms would be that radioactive isotope reacts in the same way as stable isotopes in the chemical reactions in the body. This seems to be the most suitable answer since the other choices suggest that there are nuclear reactions in our system which is very far from the truth.

Answer 2

Answer:

The statement that best explains the presence of carbon-14 in organisms is that the radioactive isotope reacts in the same way as stable isotopes in the chemicalreactions in the body. That is option B.

What is radioactive carbon-14?

Radioactive carbon-14 is a type of radioactive element that is present in the air which is assimilated in small quantities into the body during metabolism( chemical reaction of the body).

The radioactive carbon-14. can be used in a process called carbon dating because it reacts the same way as stable isotopes in their chemical reactions in the body.

Learn more about radioisotopes here:

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The primary unit of length in the metric system is the ?

Answers

meter is the primary unit of length in the metric system.

kg (killigram) for mass
L (litter) volume
m (meter) length

What is the half-life of sodium-24? EXPLAIN how you determined your answer.

Answers

The half life of sodium -24 is 15 hour.

What is half life?

The duration needed for an amount to decrease to half its original is known as the half-life.

What is sodium-24?

Sodium is a kind of element which has atomic number 11. It has three isotopes.

The radioactive isotope sodium-24, which is employed in blood tests in medicine, degrades through beta decay as well as seems to have an of 15.0 hours.

Therefore, the half life of sodium -24 is 15 hour.

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half-life is basically how long it takes for a radioactive molecule to get to 1/2 of its original mass.

so if sodium 24 mass was 5g and it's half life was 24years then:

after every 24years 1/2 of 5g would have decayed. so in 48years there will only be 2.5g left.

A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a(n) .

Answers

This is because a rock is an aggregate of different minerals. This means that it is a physical mixture rather than a chemical one. While a rock is a combination of different minerals, minerals are substances with uniform composition, represented by a chemical formula.

Answer:

the awnser is minerals :)

Explanation:

just took the test on edg.

How does the law of conservation of matter apply to chemical equations

Answers

Since the law of conservation of matter says that no matter can be created or destroyed, chemical equations must have the same amount of matter after the reaction as there was before, making them balanced.

Which one of the following groups of chemical compounds is composed entirely of organic compounds?A. C2H4O, CH2O, CaSO4
, C3H5
(OH)3
B. C2H2
, CH4
, CaCl2
, CaCN2
C. Ch3OCH3
, Ca3
(PO4
)2
, CO2
, H2CO3
D. C6H6
, C2H5OH, C6H5CH3
, C3H5
(NO3
)3

Answers

Answer;

D. C6H6, C2H5OH, C6H5CH3, and C3H5(NO3)3.

Explanation;

-Organic compound are chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen, like the examples above in choice D. . Inorganic Compoundson the other hand, are compounds made from any elements except those compounds of carbon, such as CaSO4, CaCl2 and Ca3(PO4)2 in A, B and C respectively.

The correct answer is D.

In group A, CaSO4 is not organic; in group B, CaCl2 is not organic; in group C, Ca3(PO4)2 is not organic.

Hope this helps~

A solution of H 2 SO 4 ( aq ) with a molal concentration of 1.94 m has a density of 1.119 g / mL . What is the molar concentration of this solution?

Answers

Answer:

For water should be the same. 1.94 M

Explanation:

Molarity and molality can be the same in some cases. For instance 1 liter of water weighs 1 kg. What is molality? Molality can be defined as the number of moles of substance (known as the solute) that is found in a certain mass of solvent given in kg, that it is dissolved in. The formula for calculating molality is : m = mole solute / kg solvent

However 1.94 m does not make sense with 1.119 density

1.119g/ml= 1119g/1000

1119 g=1000g water + 119g sulfuric acid=

119g/92g/mol=1.29 mol

Therefore= 1.29 molar does not make sense

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