Picture represents an oxygen atom how many protons does this atom have

Oxygen atom has 8 Protons

Explanation:

Oxygen atom (O) has an atomic number of 8, and a mass number of 16.

Recall that atomic number of any element is equal to the number of protons in its electronic shell, hence, the number of protons in oxygen atom is also 8

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

not sure if this is what you'r looking for eubacteria and archaebacteria