When analyzing an old ring weighing 3.34 g, it was found that it is 94.5% silver

When analyzing an old ring weighing 3.34 g, it was found that it is 94.5% silver, the rest is impurities. Calculate the mass of impurities in the antique ring.

1. Let’s calculate the mass of silver contained in the old ring, before making the calculations we will convert the value from percent to fractions:

m (Ag) = w (Ag) * m (rings) = 0.945 * 3.34 = 3.1563 g;

2. Subtract the mass of silver from the entire mass of the ring to find the mass of impurities:

m (impurities) = m (rings) – m (Ag) = 3.34 – 3.1563 = 0.1837 g.

Answer: 0.1837 g.