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alexira [117]
3 years ago
10

Carbon forms a great variety of stable compounds. Which of the following is not a reason for this variety?

Chemistry
1 answer:
katen-ka-za [31]3 years ago
4 0

Answer:

D.

Explanation:

Carbon atoms are not strongly electronegative  and  tend to form  covalent bonds.

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What is the number of moles in 500L of He gas at STP
kompoz [17]
Ah, this is actually a fairly simple chemistry question.

Recall that at STP, one mole is equivalent to 22.4 L. Knowing this, all you have to do is divide 500 L by 22.4 L to find the number of moles:

500/22.4 = 22.3 mol

-T.B.
7 0
3 years ago
Which nitrogenous base is NOT found in DNA? *
scoundrel [369]

Answer:

c. uracil

Explanation:

uracil is not found in DNA. the missing base would be thymine

5 0
3 years ago
This represents three steps of the rock cycle. The sediments are layered and compressed in sedimentary rock. The sedimentary roc
Ber [7]

ANSWER: C) Law of Conservation of Mass

EXPLANATION: In the given cycle, it is seen that th sediments are layered and gets compressed into sedimentary rocks which eventually gets heated and compressed to form metamorphic rocks. But, the total amount of minerals present in the sediments remains the same throughout any stage of the cycle.

This proves the law of conservation of mass which states that mass can not be created nor be destroyed, it can only be transferred from one form to another. So, in this case, only phase transition occurred but the component which is mineral inside the sediments remains constant.

Therefore, the answer is law of conservation of mass.

4 0
3 years ago
Read 2 more answers
The concentration of urea in a solution prepared by dissolving 16 g of urea in 20 g of H2OH2O is ________% by mass. The molar ma
Arada [10]

Answer:

44

Explanation:

Given that :

Mass of solute = Mass of urea = 16g

Mass of water = 20g

Mass of solution = (mass of solute + mass of solvent) = (mass of urea + mass of water) = (16g + 20g) = 36g

Percentage Mass = (mass of solute / mass of solution) * 100%

Percentage Mass = (16 / 36) * 100%

Percentage Mass = 0.4444444 x 100%

Percentage Mass = 44.44%

Percentage Mass = 44%

4 0
3 years ago
2a. Write down the names of the new substances formed when each of the following substance reacts with dilute hydrochloric acid.
Naddika [18.5K]

Answer:

i) Dilute hydrochloric acid will react with Ammonia to form ammonia salt.

ii) dilute hydrochloric acid will react with soduim hydroxide to form sodium chloride and water

iii) dilute hydrochloric acid will react with calcuim carbonate to form Calcium chloride, Carbon dioxide and water.

Explanation:

CHEMICAL EQUATIONS :

I) HCL + NH3 = NH4Cl

ii) HCL+ NaOH = NaCl + H2O

iii) HCL + CaCo = CaCl2 + CO2 + H2O

7 0
2 years ago
Read 2 more answers
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