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Which of the following statements is/are correct? a) Water is an example of non-polar solvent. b) Any solution always conatins an electrolyte c) NONE d) A solute is always molecules dissolved in water and cannot be ions. e) any (homogeneouus or hetergeneous) mixture is a solution. A sample of carbon weighs 33.1 grams. How many carbon atoms are there in the sample?
An automobile antifreeze is made using equal volumes of ethylene glycol (d = 1.114 g/mL; MM = 62.07 g/mol) and water (d = 1.00 g/mL) at 25°C. The solution has a density of 1.06 g/mL. What is the molarity of ethylene glycol in the solution
CaCN2 + 3 H2O -> CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced?
Aluminum reacts with excess hydrochloric acid to form aqueous aluminum chloride and 36.8 mL of hydrogen gas over water at 27°C and 764 mmHg. How many grams of aluminum reacted?
Consider 2 Al + 6 HCl → 2 AlCl3 + 3 H2 , the reaction of Al with HCl to produce hydrogen gas. This reaction has a yield of 82.5 percent. How much HCl are needed to produce 14.0 L of H2 at 351 K and 1.11 atm
Assuming the only weight loss for the rat is the loss of CO2 gas (i.e. water is retained), how many grams does the rat weigh once the sugar is metabolized?
A 0.894-g sample of gas occupies 125 mL at 60. cm of Hg and 25C. What is the molar mass of the gas.
What is the percentage yield if 465 grams of hydrogen reacted with excess nitrogen and 455 grams of ammonia is formed N2 (g) + 3 H2 (g) 2NH3(g)
Molybdenum crystallizes in a body-centered cubic lattice (the Mo atoms are at the lattice points only). If the density of the metal is 10.3 g/cm3, what is the unit cell edge length in pm?
Enough of a monoprotic acid is dissolved in water to produce a 1.59 M solution. The pH of the resulting solution is 2.88. Calculate the Ka for the acid. Ka=?
Consider a certain type of nucleus that has a rate constant of 2.62 * 10^-2 min^-1. Calculate the time rquired for the sample to decay to one-fourth of its initial value.
To 1.00 L of a 0.100 M aquoeus solution of the weak base pyridine C5H5N is added 1.00 ml of 14.0 M NaOH. What fraction of the pyridine molecules in the resulting solution react with water to release hydroxide ions? (Kb C5H5N = 1.7 x 10^-9)
To prepare 5.0 L of a 3.50 M solution of Potassium Hydroxide (KOH), how many grams of Potassium Hydroxide must be used?
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