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3.2 grams of a compound with a molar mass of 96.0 g/mol dissolved in 50.0 grams of water gave a solution which freezes at -1.50 °C. Kf for water is 1.86 °C/m. The van't Hoff factor for this solution is?
A bottle contains 225 mL of insulin at a concentration of 50.0 mg/mL. What is the total mass of insulin in the bottle?
How many atoms of neon occupy a volume of 14.3 L at STP?
Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: ?H3PO4 + ?Mg(OH)2->?Mg3(PO4)2 + ?H2O
A professional emergency responder should be concerned about the following routes of radiation exposure for a person on scene and a person downtown?
Acetylene gas (C2H2) is produced by adding water to Calcium carbide CaC2. How many grams of acetylene are produced by adding water to 5g CaC2?
What final temperature in OC is required for the pressure inside an automobile tire to increase from 2.15 atm at 0OC to 2.37 atm assuming the volume remains constant
Disadvantages of using a craig tube in a recrystallization?
1. the halide ion from HBr will act as the nucleophile in the first step of the reaction 2. the halide ion will act as the nucleophile in the second step of the reaction
Suppose you were asked to carry out an aldol condensation reaction between benzaldehyde and 5-methylhexanal,
A solution contains 0.635g NaOH in 236 ml solution. What is the [OH-]?
Calculate the pH of the buffer if 2.0 mL of 0.0125 M HCl is added to the buffer prepared in question 3. What is the % change in the pH of the buffer?
A radioactive sample contains 1.85 g of an isotope with a half life of 3.5 days. What mass of the isotope will remain after 5.8 days. (Assume no excretion of the nuclide from the body) M=?
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