Answer: 
Explanation:
a) 
: This is a non polar covalent compound which are held by weak vanderwaal forces of attraction.
b) 
: This is a covalent compound which is polar due to the presence of lone pair of electrons and are held by dipole-dipole forces of attraction.
c) : These are joined by a special type of dipole dipole attraction called as hydrogen bond. It forms between electronegative nitrogen atom and hydrogen atom and is the strongest interaction.
d) 
: This is a covalent compound and is non polar which are held by weak vanderwaal forces of attraction.
e) 
: This is a covalent compound and is non polar which are held by weak vander waal forces of attraction.
4
Numbers above zero are significant, as well as any zeros that appear in between two non-zero numbers.
Answer:
D
Explanation:
An atom can be considered unstable in one or two ways. If it pickes up or loses an electron,it becomes electrically charged and highly reactive.Intabability can also occur in the nucleus when the number of protons and neutrons is unbalanced.
Answer:
The answer to your question is Stoichiometry
Explanation:
Stoichiometry is a very important branch of inorganic chemistry that is used to calculate the amount of reactants or products necessary in a chemical reaction so we can get the highest yield.
In stoichiometry, we must know the balanced chemical reaction and we can work with the mass in grams or moles.
Answer:
Cl₂ is the limiting reactant.
Explanation:
- Firstly, we need to write the balanced reaction:
<em>2Na + Cl₂ → 2NaCl,</em>
It is clear that 2 mol of Na react with 1 mol of Cl₂ to produce 2 mol of NaCl.
- Firstly, we need to calculate the no. of moles of 8.0 g Na and 8.0 g Cl₂:
For Na:
n = mass/molar mass = (8.0 g)/(22.989 g/mol) = 0.348 mol.
For Cl₂:
n = mass/molar mass = (8.0 g)/(70.9 g/mol) = 0.113 mol.
- From the stichiometry: 2 mol of Na react with 1 mol of Cl₂ with (2: 1) molar ratio.
The limiting reagent in a chemical reaction is the substance that is totally consumed when the chemical reaction is complete. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.
So, 0.113 mol of Cl₂ react completely with 0.226 mol of Na which be in excess (0.384 - 0.226 = 0.158 mol).
<em>So, the limiting reactant is Cl₂ which is the reactant has the lowest molar ratio.</em>
