Answer:
the coefficient of y is -7
6 - one sodium atom, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms.
the answer should be B the rate at which work is accomplished
Density=mass divide by volume
density=1.5g/mL, V=50mL
1.5=Mass/Volume
1.5(50)=mass
Mass=75g
Hope this can help.