Question: Convert 350° F to Kelvins. Convert F to Celsius as a first step. Round to 1 d.p.
1. **State the problem:** Convert temperature from $350^\circ F$ to Kelvins (K).
2. **Formula to convert Fahrenheit to Celsius:**
$$ C = \frac{5}{9} (F - 32) $$
3. **Convert $350^\circ F$ to Celsius:**
$$ C = \frac{5}{9} (350 - 32) = \frac{5}{9} \times 318 $$
4. **Simplify the fraction:**
$$ C = \frac{5}{\cancel{9}} \times \frac{318}{\cancel{9}} = 5 \times 35.333... = 176.666... $$
5. **Round Celsius temperature to 1 decimal place:**
$$ C \approx 176.7^\circ C $$
6. **Formula to convert Celsius to Kelvin:**
$$ K = C + 273.15 $$
7. **Convert Celsius to Kelvin:**
$$ K = 176.7 + 273.15 = 449.85 $$
8. **Round Kelvin temperature to 1 decimal place:**
$$ K \approx 449.9\,K $$
**Final answer:** $449.9\,K$