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vivado [14]
3 years ago
13

The phases of the moon repeat in a cycle about every _______ days. *

Chemistry
1 answer:
DaniilM [7]3 years ago
8 0

Answer:

The moon revolves around the Earth once every 29.5 days

Explanation:

So around 30 days.

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They all contain sone hydrogen atoms.

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Describe happens when you move any atom toward the positive nuclear charge.
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5 0
2 years ago
2.5 moles of sodium chloride is dissolved to make 0.050 liters of solution
Hitman42 [59]

The answer is:

the molarity = 50 moles/liters

The explanation:

when the molarity is = the number of moles / volume per liters.

and when the number of moles =2.5 moles

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so by substitution:

the molarity = 2.5moles/0.05L

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7 0
2 years ago
(2pts) During the Purification of Lactate Dehydrogenase (LDH) experiment, you will need 50ml of buffer A150. Buffer A150 is 30mM
torisob [31]

Answer:

The answer is "20 \ mL"

Explanation:

Given:

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because it is 1 Liter

\to \frac{0.03\ moles}{1.5 moles}=0.02\ L= 20 \ mL \ of\  Tris\\\\

therefore,

it takes 20 mL of Tris.

\to \frac{0.150 \ moles}{5\ moles} =0.03\ L\\\\

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6 0
3 years ago
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