3 years ago

What is the purpose of replication?

Chemistry

1 answer:

True [87]3 years ago

8 0

Answer:

2-to produce copies of a DNA molecule

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Which molecule is solid at Room temperature? NH3 HCI C4H10 MgCl2

Rufina [12.5K]

NH3 because the molecule in the room is more solid than and room temperature

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3 years ago

What type of climate conditions are needed to form coal deposits.

guajiro [1.7K]

Answer:

Subbituminous coal can form at temperatures as low as 35 to 80 °C (95 to 176 °F) while anthracite requires a temperature of at least 180 to 245 °C (356 to 473 °F).

Sub-types: Cannel coal

Child material class: Lignite

Explanation:

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3 years ago

What's the pH of a solution composed of 0.2 moles of NH3 and 0.15 moles of nh4cl

Norma-Jean [14]

Answer:

$pH=4.63$

Explanation:

Hello!

In this case, since the ionization of ammonia, which is a weak base, is written as:

$NH_3+H_2O\rightleftharpoons NH_4^++OH^-$

We can see that the ammonium ion is the conjugate acid whereas the hydroxide ions the conjugate base; that is why we use the Henderson-Hasselbach equation to compute the pH, given the pKb of ammonia 4.75:

$pH=pKb+log(\frac{[conj\ acid]}{[base]} )$