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lyudmila [28]
3 years ago
7

Which element cannot participate in hydrogen bonding? ​

Chemistry
2 answers:
EastWind [94]3 years ago
7 0

Carbon dioxide

Explanation:

because when hydrogen mixes with oxygen carbon dioxide is canceled out

yKpoI14uk [10]3 years ago
5 0
Hydrogen bonding takes place between hydrogen and either nitrogen, oxygen, or fluorine. Carbon has an electronegativity similar to hydrogen's, and will not hydrogen bond with hydrogens in other molecules. Only molecules with -OH, -FH, or -NH groups can form hydrogen bonds.
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These steps are followed when using the half-life of carbon-14 to determine
erastovalidia [21]

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B. C, A, B

Explanation:

We can measure the age of an artifact by comparison of the activities a living sample with that of the artifact. This is so because the activity of the living sample represents the original activity of the artifact.

So, the steps involved in determining the age of an artifact is to measure the ratio of the parent and daughter nuclei. Then we use the half life of carbon to find out how many half lives have passed. Using this number of half lives that has passed, we can compute the age of the object.

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3 years ago
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7. Reproduce the following sentences as indicated in brackets. a. Urmila always goes to temple, .................... ? (Supply t
Tema [17]

Answer:

a. Urmila always goes to the temple, doesn't she?

b. Was the baby playing with the doll?

c. When will Peter start a business?

d. They have not finished the work yet.

e. She told me that her brother knows me.

f. Sita was married by Ram.

Explanation:

A. In grammar, a question tag is a very short clause at the end of a statement which changes the statement into a question. For example, in 'She said half price, didn't she?' , the words 'didn't she' are a question tag.

B. Interrogative questions/sentences often have to get a yes/no answer.

C. The "next year" will be the answer to that question. U need to ask when.

D. The have not done the work yet, therefore the answer would change from "not finish" to "have not finished"

E. Indirect speech is speech which tells you what someone said. It's like the game "telephone" indirect speech is what you tell someone else, what another person said, or what someone else tells you what another person said.

F. Passive voice means that a subject is a recipient of a verb's action.

4 0
2 years ago
The volume of a gas at 5.0 atm is 3.5 L. What is the volume of the gas at 7.0 atm at the same temperature?
Gemiola [76]

Answer:

2.5 L.

Explanation:

  • We can use the general law of ideal gas: <em>PV = nRT.</em>

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

  • If n and T are constant, and have two different values of V and P:

<em>P₁V₁ = P₂V₂ </em>

P₁ = 5.0 atm, V₁ = 3.5 L.

P₂ = 7.0 atm, V₂ = ??? L.

<em>∴ V₂ = P₁V₁/P₂ </em>= (5.0 atm)(3.5 L)/(7.0 atm) = <em>2.5 L. </em>

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4 years ago
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