Question

Sabendo que 1 cal=4,2 J transforme 50 kcal em joules:
A)105,000 J
B)168,450 J
C)199,105 J
D)210,000 J
E)420,000 J

Answer 1

4,2J ---- 1Cal
x----------50kcal
4,2.50= 210÷1= 210J
RESPOSTA CORRETA D)210,000