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denis23 [38]
3 years ago
8

I'M IN A TEST RN PLS HELP!

Chemistry
1 answer:
gtnhenbr [62]3 years ago
8 0
I think its B have a good day
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NaOH has a molarity of 2.5 M and a volume of 4 Liters, how many moles are in<br> the solution?
Inga [223]

Answer:

10. mol NaOH

Explanation:

2.5 M = 2.5 mol/L

2.5 mol/L * 4 L = 10. mol

7 0
3 years ago
What is the mass of an object if its height is 10 meters above ground and its gravitational potential energy (GPE) is 3920 Joule
Serjik [45]

Answer:

40

Explanation:

Your trying to find out the meters so your going to divide 3920J by 10 and 9.8

3920/10/9.8

8 0
3 years ago
A radioactive sample has a half-life of 5 hours. What fraction of the sample will be left after 15 hours?​
DedPeter [7]

Explanation:

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6 0
3 years ago
Which expression is equivalent to 6m + (m - 2)(m + 7) + 3?
dedylja [7]
It’s is m2 +11m-11
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8 0
3 years ago
What do you put in the calculator to get the molar mass of Mg3P2
olga55 [171]

Input the atomic masses of Mg and P to give 134.84g/mol

Explanation:

The molar mass of a substance (atom or molecule or compound) is the mass in grams of one mole of the substance:

When dealing with an element the molar mass is the relative atomic mass expressed as g/mol.

For compounds, you add the atomic masses of the component atoms and you sum up.

You simply input the atomic mass of 3 atoms of Mg and 2 atoms of P

Atomic mass of Mg = 24.3g/mol

                             P = 30.97g/mole

Molar mass of Mg₃P₂ = 3(24.3) + 2(30.97) = 134.84g/mol

learn more:

Molar mass brainly.com/question/2861244

#learnwithbrainly

6 0
3 years ago
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