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3 years ago

6

How do scientists use DNA to study the origins of humans? a. Cloning c. Using Punnett squares b. Examining the number of chromos

omes in populations d. Looking at the genetic markers in different populations

1 answer:

Korolek [52]3 years ago

5 0

B. examining the number of chromosomes in population

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What happens when nitrogen and hydrogen comes in contact at high temperature and pressure in presence of iron powder and molybde

Sidana [21]

Answer:

<h2>Ammonia Gas</h2>

Explanation:

It result in formation of ammonia gas.

N2 + 3H2 ---<u>iron</u><u>/</u><u>molybdenum</u><u>/</u><u>high</u><u> </u>temp/pres--- > 2 NH3

It forms ammonia gas.

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2 years ago

What charge does nitrogen form when it satisfies the octet rule?

ExtremeBDS [4]

The answer should be B: -3

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3 years ago

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sladkih [1.3K]

Explanation:

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2 years ago

Which of the following a true statement about igneous rocks?

Marta_Voda [28]

Answer:

i think the answer is A....

Explanation:

Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

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3 L of a gas at 250 K is changed to a temperature of 300 K. What is the final volume?

ANTONII [103]

Answer:

you can simply answer vl\t1=v2/t2

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2 years ago