Calculate the number of gold atoms present in 0.450 g of a gold ring made from 22 carat gold. Given that the atomic mass of gold is 197 and pure gold is 24 carats.

Explanation

To solve the problem of calculating the number of gold atoms present in a 0.450 g gold ring made from 22 carat gold, we can follow these steps:

### Step 1: Determine the mass of pure gold in the ring
22 carat gold means that out of 24 parts, 22 parts are pure gold. Therefore, the fraction of pure gold in the ring can be calculated as follows:

\[ \text{Mass of pure gold} = \left(\frac{22}{24}\right) \times \text{mass of the gold ring} \]
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