Question

The chemical formula for potassium chlorate is KClO3. What is the weight of the Cl (chlorine) in 13,664 grams of potassium chlorate? (Atomic weights: K; 39; Cl, 35; O, 16)

Answer 1

Answer on Question #69071 - Chemistry – Other

Task:

The chemical formula for potassium chlorate is KClO₃. What is weight of the Cl (chlorine) in 13.664 grams of potassium chlorate? (Atomic weights: K, 39; Cl, 35; O, 16).

Solution:

Let's find the molar mass of potassium chlorate:

$$M \left(K C l O _ {3}\right) = A r (K) + A r (C l) + 3 * A r (O);$$ $$M \left(K C l O _ {3}\right) = 3 9 + 3 5 + 3 * 1 6 = 1 2 2 \left(\frac {g}{m o l}\right)$$

Let's find the percentage of chlorine in potassium chlorate:

$$w (C l) = \frac {A r (C l)}{M \left(K C l O _ {3}\right)} = \frac {3 5}{1 2 2} = 0. 2 8 6 9 \text{ or } 2 8. 6 9 \%$$

Let's find the weight of the Cl in 13.664 grams of potassium chlorate:

$$m (C l) = w (C l) * m \left(K C l O _ {3}\right) = 0. 2 8 6 9 * 1 3. 6 6 4 = 3. 9 2 0 (g).$$

Answer: 3.92 grams of the Cl in 13.664 grams of KClO₃.

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