B. electrons have a negative electrical charge
Answer:
0.88g
Explanation:
The reaction equation:
2NaI + Cl₂ → 2NaCl + I₂
Given parameters:
Mass of Sodium iodide = 2.29g
Unknown:
Mass of NaCl = ?
Solution:
To solve this problem, we work from the known to the unknown.
First find the number of NaI from the mass given;
Number of moles =
Molar mass of NaI = 23 + 126.9 = 149.9g/mol
Now insert the parameters and solve;
Number of moles =
= 0.015mol
So;
From the balanced reaction equation;
2 moles of NaI produced 2 moles of NaCl
0.015mole of NaI will produce 0.015mole of NaCl
Therefore;
Mass = number of moles x molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Now;
Mass of NaCl = 0.015 x 58.5 = 0.88g
Explanation:
We have 2CO + O2 => 2CO2.
Moles of CO = 28.6g / (28g/mol) = 1.021mol.
Moles of CO2 = Moles of CO = 1.021mol.
Answer: The statement molecule
cannot be accurately described by a Lewis structure consistent with the octet rule, is true.
Explanation:
As the chemical formula of water is
and since it contains electronegative oxygen atom which also has 2 lone pair of electrons. Hence, lone pair-bond pair repulsion occurs due to which water has a bent shape structure.
The compound LiF contains metal lithium and non-metal fluorine. In order to obtain stability lithium donates its valence electron to the fluorine atom leading to the formation of an ionic bond. Hence, LiF is an ionic compound and not a covalent compound.
Generally, ionic compounds are polar in nature. For example, KOH is a polar compound and
is a non-polar compound.
Thus, we can conclude that the statement molecule
cannot be accurately described by a Lewis structure consistent with the octet rule, is true.