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skelet666 [1.2K]
4 years ago
5

The chemical formula of magnesium sulfate is MgSO 4 . Two molecules of magnesium sulfate (2MgSO 4 ) has _____.

Mathematics
1 answer:
Simora [160]4 years ago
8 0

Answer:

The answer to your question is two atoms of Magnesium

Step-by-step explanation:

Data

Molecule = MgSO₄

2 molecules of MgSO₄ has

Process

From the options given we know that we must know the number of each element in the molecules of magnesium sulfate.

To determine this number, multiply the coefficient 2 by the subscripts of each element.

                        2MgSO₄ = Mg₂ S₂ O₈

Conclusion

2 molecules of MgSO₂ have = 2 atoms of Magnesium

                                                   2 atoms of Sulfur

                                                   8 atoms of Oxygen

 

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<u>Answer:</u>

Angle A = 39°

<u>Step-by-step explanation:</u>

We are given that there is a triangle ABC where a = 9, c = 5 and angle B = 120° and we are to find the measure of angle A.

But first we need to find the side b using the law of cosine:

b^2 = a^2 + c^2- 2a*c*cos(120)

b^2 = 81 + 25 - 2*9*5*(-0.5)

b=\sqrt{151}

Now finding angle A using law of cosine:

cos(A) = \frac{b^2+c^2-a^2}{2b*c}

cos(A) = \frac{151+25-81}{2*12.29*5}

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Step-by-step explanation:

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Step-by-step explanation:

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  see below

Step-by-step explanation:

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