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Alex_Xolod [135]
2 years ago
5

How do I do this a b c

Chemistry
1 answer:
jeka57 [31]2 years ago
4 0

Answer: its side ways

Explanation:

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Use the periodic table to find the molar mass of each of the following elements. Sodium (Na): g/mol Oxygen (O): g/mol Carbon (C)
ruslelena [56]
The Molar mass of an atom corresponds directly with its atomic mass on the periodic table.
7 0
3 years ago
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Magnesium sulfate heptahydrate is heated until all the water is driven off. The sample loses 11.80 grams upon heating. What was
iren [92.7K]
Hello!

The initial mass of Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is 23,08 g

The chemical reaction for the dehydrating of Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is the following:

MgSO₄·7H₂O(s) + Δ → MgSO₄(s) + 7H₂O(g)

We know that the sample loses 11,80 g upon heating. That mass is the mass of Water that is released as vapor. Knowing that piece of information, we can apply the following conversion factor to go from the mass of water to the moles of water and back to the mass of the original compound (mi).

mi=11,80gH_2O* \frac{1 mol H_2O}{18gH_2O}* \frac{1molMgSO_4.7H_2O}{7molH_2O}* \frac{246,47 g MgSO_4.7H_2O}{1 mol MgSO_4.7H_2O}  \\  \\ mi=23,08gMgSO_4.7H_2O

Have a nice day!

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3 years ago
When is balance achieved between the forward and reverse reactions?
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Equilibrium occurs when forward and reverse directions of a reversible reaction occur at the same rate so there is no overall change in the amounts of reactants and products.

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3 years ago
PLEASE EXPLAIN CORRECTLY! THX=)
tankabanditka [31]
A way to explain it is that back then all the continents were together but soon after drifted apart the were in the same place sort of put they drifted apart so that's sorta what happened. Hope that helps a little
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21. _____ Which of the following entities has the greatest mass?
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I believe it’s D because phosphorus has the mass of 30.9.
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