Answer:
b and c
Explanation:
the problem was solved through the experiment and tested
Carbon-13 and Carbon-14 are isotopes of the element carbon. All carbon atoms have 6 protons in their nucleus and most have 6 neutrons. Since the mass number consists of # of protons + # of neutrons, Carbon 12 has an atomic mass of 12 ( = 6 protons + 6 neutrons). Carbon-13 atoms have one extra neutron, giving it a total of 7 neutrons. Carbon-14 atoms have two extra neutrons, giving them a total of 8 neutrons. Therefore the mass number of C-12= 12, C-13= 13 and C-14= 14.
This equation is impossible. NaSO4 is non-existent. Did you mean Na2SO4?
Answer:
784500 Joules
Explanation:
To start, you will need an equation to find the change in energy. This can be found by using 
or by using integrated heat capacities.
to find the mass of water,
1kg/L is the density of water.
Then, 
Notice that all of the units do not cancel out properly, so some unit conversions are needed to find the correct answer.
To make an electron jump into a higher level we basically need to provide them with the energy. This energy can be provided by heating or by striking the potassium surface with a high frequency monochromatic wave of light.
