there are no valence electrons left over, so the molecule has four bond pairs and no lone pairs.
I would use dimensional analysis for this problem. You would start with the given amount of Na which is 59.0g. You are trying to find the moles of NaCl.
(59.0g Na)*(1 mol Na)/(22.99 g Na)*(2 mol NaCl)/(2 mol Na)=
2.57 mol NaCl
The units will cancel out until you are left with moles of NaCl. The answer has the correct number of significant figures (3 sig figs).
Matter is defined as a substance which has mass and occupies volume. The three states of matter are solid, liquid and gas.
Elements which are present in group 17 are known as halogens.
Elements present in this group are fluorine, chlorine, bromine and iodine.
At room temperature, both fluorine and chlorine exists as a gas.
Bromine exists as a liquid and iodine exists as a solid.
Therefore, we can conclude that halogen groups are likely to have elements in three states of matter.
How many moles of Na Cl will be produced from 6.0 moles of HCI?
b. nuclear fuel has a higher energy density than fossil fuels.
Nuclear fuel is a quantity of energy measured in joules; therefore, it has the same units as electrical and mechanical energy.
Before a number but after a decimal. The zeros at the end would usually mean that it doesn't count but since the numbers are before the zeros and after a decimal it's 7 sig figs