Question

perform the calculation.
109 j ÷ (20.0 g × 2.51 j/g°c)
write your answer with the correct number of significant figures. round if necessary.

Explanation:

Step1: Calculate the denominator

$20.0\ g\times2.51\ J/g^{\circ}C = 50.2\ J/^{\circ}C$

Step2: Perform the division

$109\ J\div(50.2\ J/^{\circ}C)=\frac{109}{50.2}\ ^{\circ}C\approx 2.17\ ^{\circ}C$

Answer:

$2.17$