Answer:
When external portable containers are used for transfer, the container must be evacuated at least 27 in of vacuum (75 mm Hg absolute pressure) prior to transfer of the recycled refrigerant.
Explanation:
Answer:
A. sea-floor spreading.
Explanation:
The sea-floor spreading is the result of the new oceanic lithosphere
An oxygen atom is always made up of 8 protons.
The mass number of an atom is made up of both protons and neutrons.
So to find out the number of neutrons, you subtract the number of protons from the mass number.
Number of neutrons = Mass number - number of protons
So for oxygen with a mass number of 18:
There are: 18 - 8 = 10 neutrons
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Answer:
There are 10 neutrons in an atom of oxygen with a mass number of 18.
(option C)
Answer:
4 mol of lithium nitride would be produced
Explanation:
6Li + N2 → 2Li3N
This equation means that 6 mol of lithium are reacted with 1 mol of nitrogen to make, 2 mol of lithium nitride.
So this is the rule of three to find out, how many moles of lithium nitride are been made, from 12 mol of Li.
6 Li _____ 2 Li3N
12 Li ________ (12. 2) / 6 = 4 moles