3 years ago

Bacteria that can make food using chemicals are called

Chemistry

1 answer:

Naddik [55]3 years ago

4 0

False because I think it’s supposed to be photoheteroterotrophs

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What must occur for a change to be a chemical reaction? a. There must be a change in chemical properties. b. There must be a cha

sergey [27]

Answer:

A. There must be a change in chemical properties.

At least 2 or 3 atoms must change for it to be considered chemical. There must be some type of reactants that will change this. Otherwise, it's not a chemical reaction.

Hope this helps!

8 0

2 years ago

Sodium acetate spontaneously crystallizes out of a supersaturated solution upon standing or upon the addition of a seed crystal.

AlekseyPX

Answer:

Option (c) is correct.

Explanation:

According to 2nd law of thermodynamics, every spontaneous process is associated with increase in entropy ( $\Delta S>0$ ).

As sodium acetate crystallizes out spontaneously therefore it is associated with $\Delta S>0$ .

During crystallization, bond formation takes place which results evolution of heat. In other words, crystallization phenomenon is exothermic ( $\Delta H$ ).