Answer:
State the major concepts behind the kinetic molecular theory of gases.
Demonstrate the relationship between kinetic energy and molecular speed.
Apply the kinetic molecular theory to explain and predict the gas laws.
Explanation:
Answer:
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.
Just do this for the sentence lol "Ocean Trenches are trenches in the Ocean".
Answer:
Hydrogen bonding, Dipole-dipole
Explanation:
Let us look closely at the structure of H2S, this will enable us to decide if it will show dipole-dipole interaction or not. Given that Sulphur has a greater electro negativity compared to Hydrogen, we expect that the S – H bond will be a polar bond with the direction of polarity pointing towards the sulphur atom according to the usual convention in chemistry. Now, we know that H2S is a bent molecule (there are two lone pairs on the central sulphur atom which leads to a bent molecular geometry), therefore, the vectorial sum of the bond dipole moments will produce a non- zero total dipole moment. This implies that there is a permanent non-zero dipole moment in H2S therefore we expect the molecule to exhibit dipole-dipole interactions .
Similarly, we know that hydrogen bonding exists when hydrogen is bonded to a highly electronegative element such as fluorine, sulphur, oxygen etc. In H2S, hydrogen is bonded to sulphur hence we expect that there should be hydrogen bonding between H2S molecules. Hydrogen bonding is actually a type of dipole-dipole interaction.
D) 36.2 mL of 0.1105 M NaOH solution
Explanation:
We have the following chemical reaction:
HCOOH + NaOH → HCOONa + H₂O
molar concentration = number of moles / volume (L)
number of moles = molar concentration × volume
number of moles of HCOOH = 0.2 × 20 = 4 mmoles
From the chemical reaction we see that 1 mmole of HCOOH will react with 1 mmole of NaOH so 4 mmoles of HCOOH will react with 4 mmoles of NaOH.
volume = number of moles / molar concentration
volume of NaOH solution = 4 / 0.1105 = 36.2 mL
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molar concentration
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