Mindblown: a blog about philosophy.
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A student mixes four reagents together, thinking that the solutions will neutralize each other.
A student mixes four reagents together, thinking that the solutions will neutralize each other. The solutions mixed together are 50.0 mL of 0.100 M hydrochloric acid, 100.0 mL of 0.200 M of nitric acid, 500.0 mL of 0.0100 M calcium hydroxide, and 200.0 mL of 0.100 M rubidium hydroxide. Is the resulting solution neutral? If…
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You are given a 1.50-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 100 mL of water and then add an excess of 0.500 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The white solid has a mass of 0.641 g. If you had an extremely magnified view of the solution (to the atomic-molecular level), list the species you would see (include charges, if any).
Answer:- When AgNO₃ solution is added to mixture of NaNO₃ and NaCl, it reacts with NaCl and gives precipitate of AgCl, that is white solid. The reaction takes place in 1:1 stoicheometric ratio as per the following balanced reaction: NaCl + AgNO₃→ AgCl ↓ + NaNO₃. As per reaction 1 mole NaCl reacts with 1 mole…
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The drawings below represent aqueous solutions. Solution A is 2.00 L of a 2.00 M aqueous solution of copper(II) nitrate.
The drawings below represent aqueous solutions. Solution A is 2.00 L of a 2.00 M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of a 3.00 M aqueous solution of potassium hydroxide. a. Draw a picture of the solution made by mixing solutions A and B together after the precipitation reaction takes place.…
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A stock solution containing Mn2 ions was prepared by dissolving 1.584 g pure manganese metal in nitric acid and diluting to a final volume of 1.000 L.
The following solutions were then prepared by dilution: 1. For solution A, 50.00 mL of stock solution was diluted to 1000.0 mL. 2. For solution B, 10.00 mL of solution A was diluted to 250.0 mL. 3. For solution C, 10.00 mL of solution B was diluted to 500.0 mL. Calculate the concentrations of the…
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Calculate the sodium ion concentration when 70.0 mL of 3.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.
Answer:- The sodium ion concentration when 70.0 mL of 3.0 M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate is: The molar mass of a material is referred as the mass of the substance contained in one mole of the substance. Therefore the concentration of sodium ions is 4.5M.
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A 9.780-g gaseous mixture contains ethane (C2H6) and propane (C3H8).
A 9.780-g gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
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A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 g of the compound produced 0.213 g CO2 and 0.0310 g H2O.
A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 g of the compound produced 0.213 g CO2 and 0.0310 g H2O. In another experiment, it is found that 0.103 g of the compound produces 0.0230 g NH3. What is the empirical formula of the compound? Hint: Combustion involves reacting with excess O2.…
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Vitamin A has a molar mass of 286.4 g/mol and a general molecular formula of CxHyE, where E is an unknown element.
Vitamin A has a molar mass of 286.4 g/mol and a general molecular formula of CxHyE, where E is an unknown element. If vitamin A is 83.86% C and 10.56% H by mass, what is the molecular formula of vitamin A?
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The empirical formula of styrene is CH; the molar mass of styrene is 104.14 g/mol.
The empirical formula of styrene is CH; the molar mass of styrene is 104.14 g/mol. What number of H atoms are present in a 2.00-g sample of styrene?
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Some bismuth tablets, a medication used to treat upset stomachs, contain 262 mg of bismuth subsalicylate,
Some bismuth tablets, a medication used to treat upset stomachs, contain 262 mg of bismuth subsalicylate, C7H5BiO4, per tablet. Assuming two tablets are digested, calculate the mass of bismuth consumed.
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