Answer:
Because the freezing point of pure water is 0°C, the sucrose solution freezes at ... where K b is the molal boiling point constant and m is the concentration of the solute ... Calculate the total ionic molality of a solution of 50.0 grams of aluminum.
Explanation:
Answer:
Explanation:
Given
Sugar = 56g
Tea = 78g
Required
Determine the mass percent of the sugar
First we need to calculate the total mass
The percentage mass is then calculated as thus
Substitute 56 and 134 for Sugar and Total mass respectively
Approximate
<em>Hence, the percentage mass of sugar is 42%</em>
The scientist will repeat the experiment to make sure that
his results are reliable.
NO2- +7H+ + 6e->> NH3 + 2H2O ( N goes from +3 to -3)
<span>Al + 2 H2O >> AlO2- + 4H+ + 3e- </span>
<span>NO2- + 2Al + 2H2O >> NH3 + 2AlO2- + H+ </span>
<span>add OH- on the left and on the right </span>
<span>NO2- + 2 Al + H2O + OH- >> NH3 + 2 AlO2-</span>
Answer:
Limiting reactant: Cl2.
Max mass of PCl3 = 41.44 g.
P4 leftover = 5.51 g.
Explanation:
Hello!
In this case, since the undergoing chemical reaction is:
In order to compute the maximum amount of PCl3, it is necessary to compute the grams of this product produced by each reactant, just as shown below, whereas molar masses and mole ratios are used:
Thus, since chlorine gas yields fewer grams of PCl3 than P4 we infer Cl2 is the limiting reactant and 63.41 grams of PCl3 product are yielded.
Finally, for the excess reactant, we see a difference of 63.41-41.44=21.97g, so we can compute of the leftover of P4 as follows:
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