General Chemistry Answers

If 10.0 moles of O₂ are reacted with excess NO in the reaction below, and only 3.8 mol of NO₂ were collected, then what is the percent yield for the reaction?

2 NO (g) + O₂ (g) → 2 NO₂ (g)

If 65.7 g of aspirin (C₉H₈O₄) are produced from 79.8 g of C₇H₆O₃, what is the percent yield from the reaction below?

C₇H₆O₃ (s) + C₄H₆O₃ (l) → C₉H₈O₄ (s) + HC₂H₃O₂ (aq).

If 50cm3 of a saturated solution of potassium chloride at 30°C yielded 18.62g of dry salt, calculate the solubility of the salt in mol/dm³ at 30°C

What is the net ionic equation for the reaction that occurs when aqueous barium chloride reacts with aqueous sulfuric acid

Calculate the volume of carbon(IV)oxide at 30 degree celcius and 710mmHg pressure which could be obtained by heating 22g of Magnesium trioxocarbonate(IV).given Magnesium=84,carbon(IV)oxide=44,molar volume of a gas at STP=22.4dm3

If 10.0 g of a solute is added to 100.0 g of water, the mass percent of the solution is

Two solutions A and B were prepared by Dr. CardiBee for her experiment about measuring the strength of selected acids. Solution A has a pH of 5.50 containing 20.0 mL of 0.900 M sodium acetate + 15.0 mL of 0.750 M acetic acid. On the other hand, solution B has a pH of 4.90 containing 10.0 mL of 0.800 M sodium acetate + 15.0 mL of 0.400 M acetic acid.

What is the temperature (in K) of 0.715 mole of neon in a 2.00 L vessel at 4.68 atm?

Use the fuel values to calculate the maximum kJ/gal you could get from butane (0.573 g/mL) and ethanol (0.703 g/mL). Fuel value of butane= 49.6120689655 kJ/g

Fuel value of ethanol= - 29. 7173913043 kJ/g

Oxygenated fuels are used as motor vehicle fuels or fuel additives because they burn cleaner, thereby reducing air pollution. They also affect the miles per gallon. Compare the fuel value and decide if oxygenation results in an increase or decrease in miles per gallon. Briefly explain why.