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I need help with the solution

I need help with the solution-example-1
User The
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1 Answer

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15 votes

Answer:

1

Step-by-step explanation:

The empirical formula describes the simplest whole number ratio of each type of atom in a compound. To find this formula, you need to (1) convert grams of each element to moles (via their atomic masses) and then (2) find the ratio of each element (by dividing each molar value by the smallest mole value).

(Step 1)

Atomic Mass (Zn): 65.380 g/mol

Atomic Mass (C): 12.011 g/mol

Atomic Mass (O): 15.998 g/mol

10.40 grams Zn 1 mole
------------------------ x ------------------------ = 0.159 moles Zn
65.380 grams

1.92 grams C 1 mole
--------------------- x ----------------------- = 0.160 moles C
12.011 grams

7.68 grams O 1 mole
---------------------- x ------------------------ = 0.480 moles O
15.998 grams

(Step 2)

0.159 moles Zn / 0.159 = 1 atom Zn

0.160 moles C / 0.159 = 1 atom C

0.480 moles O / 0.159 = 3 atom O

The empirical formula is ZnCO₃. Therefore, the value that should be in the space is 1.

User Akhil Thayyil
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