Answer:
0.1714 (w/w) %
Explanation:
Using the equation:
<em>16H+(aq) + 2Cr2O72−(aq) + C2H5OH(aq) → 4Cr3+(aq) + 2CO2(g) + 11H2O(l)</em>
2 moles of dichromate ion (Cr₂O₇²⁻) are used to titrate 1 mole of alcohol (C₂H₅OH)
35.46mL = 0.03546L of a 0.05961M Cr₂O₇²⁻ solution used to reach the equivalence point in the titration contains:
0.03546L ₓ (0.05961 moles Cr₂O₇²⁻ / L) = <em>2.114x10⁻³ moles Cr₂O₇²⁻</em>
As 2 moles of dichromate reacts per mole of alcohol, moles of alcohol in the sample of plasma are:
2.114x10⁻³ moles Cr₂O₇²⁻ ₓ ( 1 mole C₂H₅OH / 2 moles Cr₂O₇²⁻) =<em> 1.0569x10⁻³ moles of C₂H₅OH</em>
As molar mass of alcohol is 46.07g/mol, mass of alcohol is:
1.0569x10⁻³ moles of C₂H₅OH ₓ (46.07g / mol) =<em> 0.04869g of C₂H₅OH</em>
Thus, mass percent of alcohol in the blood using the 28.40g of plasma is:
(0.04869g of C₂H₅OH / 28.40g) × 100 = <em>0.1714 (w/w) %</em>
Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The chapter on atoms, molecules, and ions introduced the basic idea of nuclear structure, that the nucleus of an atom is composed of protons and, with the exception of
Polar molecules are molecules with net dipole due to the presence of partial positive and partial negative charge. For example, water is a polar molecule that has partial positive and partial negative charge on it. CO2 is a non polar compound.
Answer: The following molecules are polar:
SO2- It is polar because it has dipole moment.
CH2Cl2
PCl3
Answer: Photosynthesis and cellular respiration are related because the reactants for photosynthesis is the products (plus ATP) is cellular respiration. Also the products for cellular respiration is the reactants for cellular respiration.
Explanation:
