General Chemistry Answers

A student performs an experiment to determine the density of a sugar solution.  She obtains the following results:  1.27 g/mL, 1.29 g/mL, 1.28 g/mL, and 1.29 g/mL.  If the actual value for the density of the sugar solution is 1.86 g/mL, which statement below best describes her results?

Calculate the volume of concentrated (18.0 mol/L) HNO₃ needed to dilute to make 250 mL of 0.40 mol/L HNO₃ solution

What mass of chromium (111) nitrate is contained in 250mL of a 0.450mol/L solution?

Raw milk is stored at a dairy farm in a refrigerated cylindrical vat 6.50 feet wide and 12.5 feet high.Ifthevatcontains3.3×10²ft³ofmilk, how many kg

of milk does the vat contain, given that raw milk has a density of 1030

kg/m³

?

The complete combustion of 1 mole of propane (C₃H₈) is represented by the reaction shown. C₃H₈ + 5O₂ → 3CO₂ + 4H₂O How many grams of water are produced in this reaction?

NaHCO3(s) + CH3COOH(aq)→NaCH3COO(aq) + H2O(/) + CO2(g)

Is the equation of the overall reaction between the baking soda and vinegar balanced or not?

Balance the equation for the complete combustion of octane (C8H18), a component of car fuel. In this process, octane reacts with oxygen gas (O2) and produces water and carbon dioxide.

Balance the chemical equation of MgO(s) + Fe(s)→Fe2O3(s) + Mg(s)

how many grams of HCI are consumed by the reaction of 2.50 moles of magnesium

In an experiment, 12.0g of carbon gives 44.0g of carbon dioxide. What is the weight percentage of carbon in CO2?

*Skill: The weight percentage and mole percentage can be calculated if you know the chemical formula.

If you reduce 44.0 grams of CO2 to carbon, how many grams of C will you get?