A chemist is studying how a new type of paper absorbs ink. Which is a macroscopic view of the chemist’s subject?

Chemistry

2 answers:

nadezda [96]3 years ago

8 0

B. one sheet of the new type of paper

dalvyx [7]3 years ago

8 0

Answer: B. one sheet of the new type of paper.

Explanation: Macroscopic views are the those observable which are presented on the larger scale rather than being on the smaller scale.

Now, it is given that the chemist us studying a new type pf paper that absorbs ink.

Thus option A explains the microscopic view about the individual fibers that make up the paper. Those small fibers which are responsible for the making of the paper.

Option C also explains the microscopic view as it is asking for the chemical composition of the fibers of the paper.

Thus option B is the only macroscopic view which explains the whole one sheet of the new type of water which includes the knowledge of the individual fibers as well as the chemical composition of the fibers as well.

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Calculate the solubility product for the following:

ololo11 [35]

Answer: 2.749 x 10^-14

Explanation:

<u>Given:</u>

The concentration of Ce(IO3)4 in the solution = 1.5 x 10-2 g/100 mL= 0.15 g/1000 mL= 0.15 g/L

Molar mass of Ce(IO3)4 = 839.7267 g/mol

Therefore, the molarity of Ce(IO3)4 in the solution is given by:

$\begin{gathered}M=\frac{0.15 \mathrm{~g} / L}{839.7267 \mathrm{~g} / \mathrm{mol}} \\M=1.7863 \times 10^{-\mathbf{4}} \mathrm{mol} / {L}=\mathbf{1 . 7 8 6 3 \times 1 0 ^ { - \mathbf { 4 } } \boldsymbol { M }}\end{gathered}$

The solubility equilibrium is given by:

$\mathrm{Ce}\left(\mathrm{IO}_{3}\right)_{4(s)} \rightleftharpoons \mathrm{Ce}_{(a q)}^{3+}+3 \mathrm{IO}_{3}^{-}(a q)$

Therefore, the solubility product is given by:

$\begin{gathered}K_{s p}=\left[C e^{3+}\right] \cdot\left[I O_{3}^{-}\right]^{3} \\\therefore K_{s p}=\left(1.7863 \times 10^{-4}\right) \times\left(3 \times 1.7863 \times 10^{-4}\right)^{3}\end{gathered}$