Answer:
The correct answer will be "".
Explanation:
We have:
Moles of solute (Na₂Co₃) =
=
=
Now,
The volume of the solution will be:
⇒
∴
The formula to find the concentration will be:
⇒
On substituting the given values, we get
⇒
⇒
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
Since the configuration contains the number 2s and 2p, you can assume that it is in period 2 of the periodic table. By noble gas shorthand, you start with helium, which is atomic number 2. 2s²2p^4 has 2+4 = 6 valence
Add 2+6 = 8, which is Oxygen.
Answer:
Net force= -5N+5N =0
Therefore there is no change in motion
Explanation: