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Helga [31]
3 years ago
11

Help help help ASFAP

Chemistry
1 answer:
gulaghasi [49]3 years ago
5 0

Answer:

A directory of relatives' phone numbers

Hope this helps

Explanation:

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3 years ago
What is the molar concentration of
Leto [7]

Answer:

1.42 M

Explanation:

First calculate the amount of moles.

that's done by dividing the mass with the molecular mass so 660g / 310.18 g/mol = 2.13 mol

Then you can calculate the molarity by dividing the moles with the volume so 2.13 mol / 1.5 l = 1.42 M

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2 years ago
What formula do you use to calculate the heat in a endothermic reaction?
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I guess this is the answer
You’re welcome ;)
4 0
3 years ago
If an element has two isotopes, what is the atomic mass if one of the isotopes has a mass of 15.000 amu and makes up 5.000% of t
olasank [31]
The atomic mass of element is the weighted average atomic mass of the element with respect to the abundance of the isotopes of that element 
atomic mass is the sum of the products of the mass of isotopes by their percentage abundance 
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atomic mass of element is therefore 15.950
8 0
3 years ago
Which relationship below is an example of a predator-prey relationship? OA. A coyote eats a hen. OB. A rabbit eats grasses. O C.
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A

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8 0
3 years ago
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