HRS - Ask. Learn. Share Knowledge. Logo

Questions in chemistry

[Done] A material found in air, water, or soil that is harmful to humans or other organisms: 1. Experiment 2. Hypothesis 3. Pollutant 4. Matter

[Done] Objects that can be seen only under magnification: A. Macroscopic world B. Technology C. Hypothesis D. Microscopic

[Done] The study of all chemicals containing carbon 1. Applied Chemistry 2. Bio Chemistry 3. Organic Chemistry 4. Inorganic Chemistry

[Done] How do I separate sugar from rice?

[Done] Which type of gas is filled in Lay's packs, and why?

[Done] Write the complete reaction of succinic acid and acetic anhydride.

[Done] You would expect a phosphorus-chlorine bond to be: 1. Nonpolar, with neither end having a partial charge. 2. Polar, with neither end having a partial charge. 3. Nonpolar, with the chlorine end having a partial negative charge. 4. Polar, with the chlorine end having a partial negative charge. 5. Nonpolar, with the phosphorus end having a partial negative charge. 6. Polar, with the phosphorus end having a partial negative charge. Explain why, please.

[Done] A solution of hydrogen peroxide, \(\text{H}_2\text{O}_2\), is titrated with potassium permanganate, \(\text{KMnO}_4\), according to the following equation: \[5\text{H}_2\text{O}_2 + 2\text{KMnO}_4 + 3\text{H}_2\text{SO}_4 \rightarrow 5\text{O}_2 + 2\text{MnSO}_4 + 8\text{H}_2\text{O} + \text{K}_2\text{SO}_4\] It requires 46.0 mL of 0.145 Mol/L \(\text{KMnO}_4\) to titrate 50.0 mL of the solution of \(\text{H}_2\text{O}_2\). What is the mole per liter concentration of \(\text{H}_2\text{O}_2\) in the solution?

[Done] Name a metal that doesn't conduct electricity.

[Done] When \(\text{MgCO}_3(s)\) is strongly heated, it produces solid \(\text{MgO}\) as gaseous \(\text{CO}_2\) is driven off. Does the oxidation number of carbon change upon the formation of \(\text{CO}_2\)?