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Greeley [361]
3 years ago
9

Can you determine the molecular formula of a substance from its percent composition

Chemistry
1 answer:
Natalka [10]3 years ago
8 0
The percent composition<span> gives you only the empirical formula. 
</span><span>To get the molecular formula, you must either know the molecular mass or do an experiment to find it.</span>
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Which characteristic of a strong acid
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Answer:

Strong acid breaks up into ions

Explanation:

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Explain how to convert a mass of compound A to a mass of compound D in words with no equations using the following reaction 2A +
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Answer:

Explanation:

The given reaction equation is:

                2A + 4B → C + 3D

We know the mass of compound A in the reaction above. We are to find the mass of compound D.

We simply work from the known mass to calculate the mass of the unkown compound D

Using the mole concept, we can find the unknown mass.

Procedures

  • We first find the molar mass of the compound A from the atomic units of the constituent elements.
  • We then use the molar mass of A to calculate its number of moles using the expression below:  

            Number of moles of A = \frac{mass of A}{molar mass of A}

  • Using the known number of moles of A, we can work out the number of moles of D.

           From the balanced equation of the reaction, it is shown that:

         2 moles of compound A was used up to produced 3 moles of D

  Then \frac{3}{2} x number of moles of A would give the number of moles of D

  • Now that we know the number of moles of D, we can find its mass using the expression below:

             Mass of D = number of moles of D x molar mass of D

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Which phrases describe sedimentary rock? check all that apply.​
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Sedimentary rock, rock formed at or near Earth's surface by the accumulation and lithification of sediment by the precipitation from solution at normal surface temperatures

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c

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It is a mixture because it is the physical combination of two or more substances

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