Answer: The atom has 7 neutrons and 8 protons.
Explanation: On Edhenuity!!!!!!!!!
Rmm of N20 = (14X2) + 16 = 44
Percentage by mass of Nitrogen in N20 = 28/44x100 = 63.64
66x0.6634 = 43.7844g of Nitrogen in 66g of N20
Moles = Mass/Mr = 43.7844/14 = 3.13 moles
Answer:
1500 mmol.
Explanation:
Hello,
In this case, for such monovalent potassium species, we can verify that 1 mEq equals 1 mmol, therefore, the required solution is shown below:

Which means that also 1500 mmol of monovalent potassium ions are contained in the liter.
Regards.
Answer:
letter C. Solid iron and chlorine gas react to produce solid iron (lll) chloride
Explanation:
i hope it helps
BOLD is the correct one.
A.)Iodine = 126
B.)Bromine = 79
C.)Tellurium = 127
D.)Krypton = 83
Hoped I helped!