Which of the following actions decreases the entropy of a system? A-mixing baking soda and salt
b- freezing water
c- dissolving salt in water
d-boiling water

b- freezing water

Explanation:

Solid<liquid<gas is the general rule for entropy increase

Freezing water would change the phase from liquid to solid which would lead to less entropy

a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity

explanation:

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons