Answer:
Six
Explanation:
Oxygen has six valence electrons in its elemental form so its formal charge is 6 – 6 = 0. Each hydrogen atom owns one electron [(2x½) = 1].
Answer:
the answer is d hope this helps
and dont forget to mark me as brainliest
Explanation:
Answer:
bubbled
Explanation:
its simple they bubbled
signs of chemical reactions are change of
odor
bubbles
solid turns liquid
liquid turns solid
change of color
According to the balanced equation of the reaction:
H2X (aq) +2 NaOH (aq) → Na2X (aq) + 2H2O(l)
First, we have to get the no. of moles of H2X:
no.of moles of H2X = weight / molar mass
when we have the H2X weight = 0.1873 g & the molar mass H2X = 85 g/mol
So by substitution:
∴ no.of moles of H2X = 0.1873 /85
= 0.0022 mol
-then, we need to get no.of moles of NaOH:
from the balanced equation, we can see that 1 mol H2X = 2 mol NaOH
∴ no.of moles of NaOH = no.of moles of H2X *2
= 0.0022 * 2 = 0.0044 mol
So we can get the volume per litre from this formula:
M (NaOH) = no.of moles NaOH / Volume L
So by substitution:
0.1052 = 0.0044 / Volume L
∴Volume = 0.042 L *1000 = 42 mL
Answer:
It allows chemists to deal with a large number of atoms.
Explanation:
Instead of saying 6.022 x 10 ^23 atoms, chemists can say that is one mole, allowing bigger numbers of atoms to be more easily attained.
