What happens to mass and energy in a closed system? A. Both energy and mass can enter or exit a closed system.
B. Only mass can enter or exit a closed system.
C. Only energy can enter or exit a closed system.
D. Neither energy nor mass can enter or exit a closed system.
SUBMIT

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

Given the data below for the reaction, 2 a + 2 b + 4 c => d + e + 3 f, the reaction is fill in the [ ] order in a, fill in the [ ] order in b, fill in the [ ] order in c and fill in the [ ] order overall. (use the words "first, second, third, fourth" to fill each blank)experimentinitial conc of a, mol/l initial conc of b, mol/l initial conc of c, mol/l initial rate, mol/l.s1 0.1 0.1 0.2 2 x 10-32 0.2 0.3 0.2 6 x 10-33 0.3 0.1 0.2 2 x 10-34 0.4 0.3 0.4 1.2 x 10-2