I think it's RbCl and CaO
Answer:
C. 6.99 moles
Explanation:
To convert molecules to moles we simply divide the given number of molecules by Avogadro's number, 6.022 x 10²³
Given number of molecules : 4.21 x 10^24
Number of moles : 4.21 x 10^24 / 6.022 x 10²³ = 6.99 moles ( rounded )
The answer is C
The correct answer would be (C) 2,8,3
Explanation:
A full first shell is comprised of two electrons, and for the shells in between the max is 8 (for this small of an element, it can be larger for some larger elements; but that’s beside the point), and aluminum is in group 13 so it has 3 valance electrons.
Answer: thats alot of reading
Explanation:
Answer:
Explanation: the molar mass of the whole compound is 223.35u
now make ratios for each of the elements and multiply by 100%
copper= 63.55/223.35 x 100 % comp of copper is 28.45%
bromine= (79.9x2)/223.35 x 100 %comp of bromine is 71.54%
multiply bromines molar mass by 2 when calculating
