Answer:
the answer is B) Planting native grasses in bare soil
Explanation:
Answer
is: 1) ccl4, kb = 29.9°c/m, carbon tetrachloride has the greatest boiling point
elevation.
The boiling point elevation is directly
proportional to the molality of the solution according to the
equation: ΔTb = Kb · b.
<span>
ΔTb - the boiling point
elevation.
Kb - the ebullioscopic
constant.
b - molality of the solution.
So the highest boiling poing elevation will be for solution with highest ebullioscopic constant because molality is the same.</span>
Answer:
Approximately
.
Explanation:
If the concentration of
ions in a solution is
, the
of that solution would be
.
Note that the base of the logarithm in this calculation should
. One way to be sure is to state the base explicitly. Using the change of base rule of logarithms:
.
In this question, it is implied that the concentration of
in the given solution is
, such that
. Using the equations above:
.
First, we can see that the output is a salt and water which means that the reactants were an acid and a base. Since the given reactant is a base, thus, NH4OH is excluded as it is also a base.
Now, examining the outputs of the reactions, we will find that they are composed mainly of sodium, hydrogen, oxygen and carbon. This excludes H3PO4 as it contains phosphorus.
The last step is to compare between the number of moles of each element in the output with those in the input. The output has 1 sodium mole, 2 carbon moles, 5 hydrogen moles and 3 oxygen moles.
The given input (NaOH) has 1 sodium, 1 oxygen and 1 hydrogen moles. Therefore, the other input (reactant) should have 2 carbon, 4 hydrogen and 2 oxygen moles.
Based on this, the right solution is CH3COOH.
The answer will be the gravitational force, because if we weren't in the gravity of the sun we would also be floating around with not much purpose.