How many joules are in 148 calories? (1 cal = 4.18 j) a. 6.61 j b. 35.4 j c.148 j d. 619 j.

Since it is already given that in 1 calorie, there is 4.18 joules, and that we are asked how many joules are there given 148 calories. So we multiply 148 cal by 4.18 joules. 148 cal x 4.18 J and this will give us 618.64 Joules. Round this off and the result would be 619 Joules. Therefore, the correct answer would be option D. 619 J.