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Great Assignment Help Questions

A student mixes four reagents together, thinking that the solutions will neutralize each other.

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Posted: 18-11-2022

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).

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Posted: 18-11-2022

The drawings below represent aqueous solutions. Solution A is 2.00 L of a 2.00 M aqueous solution of copper(II) nitrate.

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Posted: 18-11-2022

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.

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Posted: 18-11-2022

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.

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Posted: 18-11-2022

A 9.780-g gaseous mixture contains ethane (C2H6) and propane (C3H8).

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Posted: 17-11-2022

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.

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Posted: 17-11-2022

Vitamin A has a molar mass of 286.4 g/mol and a general molecular formula of CxHyE, where E is an unknown element.

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Posted: 17-11-2022

The empirical formula of styrene is CH; the molar mass of styrene is 104.14 g/mol.

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Posted: 17-11-2022

Some bismuth tablets, a medication used to treat upset stomachs, contain 262 mg of bismuth subsalicylate,

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Posted: 17-11-2022

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