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# Mass of Fluorine in 24.6g SnF? Toothpaste: A Breakdown

**Chapter 3, Problem 3.48**

(choose chapter or problem)

**QUESTION:**

Tin(II) fluoride (\(\mathrm{SnF}_{2}\)) is often added to toothpaste as an ingredient to prevent tooth decay. What is the mass of **F** in grams in 24.6 g of the compound?

### Questions & Answers

**QUESTION:**

Tin(II) fluoride (\(\mathrm{SnF}_{2}\)) is often added to toothpaste as an ingredient to prevent tooth decay. What is the mass of **F** in grams in 24.6 g of the compound?

**ANSWER:**

Step 1 of 2

Here, we are going to calculate the mass of F in the compound.

Given that,

Mass of the \(S n F_{2}=24.6 \mathrm{~g}\)

The molar mass of \(S n F_{2}=156.7 \mathrm{~g} / \mathrm{mol}\)

Thus, 1.0 mol of \(\mathrm{SnF}_{2}\) contains 156.7 g

Similarly,

The molar mass of F = 19.00 g/mol

Therefore,

\(\% \text { of } \mathrm{F} \text { by mass }=\frac{2 \times 19.00 \mathrm{~g} / \mathrm{mol}}{156.7 \mathrm{~g} / \mathrm{mol}} \times 100 \%=24.25 \%\)

Thus, the mass of F in the compound = 0.2425 g

Therefore,

The mass of F in g in the \(\mathrm{SnF}_{2}\) is \(=(24.6 \times 0.2425) \mathrm{g}\)

= 5.97 g

Therefore,the mass of F in g in the \(\mathrm{SnF}_{2}\) is 5.97 g.

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##### Mass of Fluorine in 24.6g SnF? Toothpaste: A Breakdown

Want To Learn More? To watch the entire video and ALL of the videos in the series:

Tin(II) Fluoride in Toothpaste: Dive into the chemistry of Tin(II) Fluoride commonly used in toothpaste to prevent tooth decay. Understand molar mass calculations stoichiometry and determine the fluoride content in a given compound