Answer
$$177^{\circ} \mathrm{C}$$ Please see the work step by step below.
Work Step by Step
To Convert the Fahrenheit $T_{\left(^{\circ} \mathrm{F}\right)} = 350^{\circ} \mathrm{F} $ temperature to Celsius $T_{\left(^{\circ} \mathrm{C}\right)}$ we apply this conversion formula : $$T_{\left(^{\circ} \mathrm{C}\right)}=\left(T_{\left(^{\circ} \mathrm{F}\right)}-32\right) \times (\frac{5} {9})$$ $$\therefore T_{\left(^{\circ} \mathrm{C}\right)}=\left(350-32\right) \times (\frac{5} {9}) = 177^{\circ} \mathrm{C}$$