Question

convert 3.00 cal into joules. your answer should have three significant figures (round your answer to the nearest hundred). do not include units in your answer. remember that 1 cal = 1 kcal = 1,000 cal.

Explanation:

Step1: Convert Cal to cal

Since \(1\ Cal = 1000\ cal\), for \(3.00\ Cal\), we have \(3.00\times1000 = 3000\ cal\).

Step2: Convert cal to joules

We know that \(1\ cal=4.184\ J\). So, \(3000\times4.184 = 12552\ J\).

Step3: Round to three significant figures (to the nearest hundred)

\(12552\approx12600\) (rounded to the nearest hundred).

Answer:

12600