Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Calculate how many cm^3 of a solution of sulfuric acid 80.0% (density = 1.727 g/mL) must be diluted with water in order to prepare a solution of 0.2 L 0.4 M. What's the pH of this solution if we add
A solution is made by mixing 89 g of n-propyl choride (C3H7Cl) and 79 g of n-propyl bromide (C3H7Br). Assume the solution is ideal. What is the total vapor pressure of the solution at 25C?
Chlorine gas can be produced commercially by passing an electric current through a concentrated solution of sodium chloride (brine). How much H2 can be produced?
if the molality of a NaBr(aq) solution is 2.50 m what is the weight percent of NaBr? the molar mass of NaBr is 102.9 g/mol
The benzene recovered in this stream represents 96 wt% of the B in the feed to this column. Calculate the molar flow rates (Kg/min) and component mass fractions in each product stream both columns.
The men's world record for swimming 1500.0 m in a long course pool (as of 2007) is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.850 miles? (1 mi = 1609 m.)
A 4.30 g nugget of pure gold absorbed 271 J of heat. What was the final temperature of the gold if the initial temperature was 21.0°C? The specific heat of gold is 0.129 J/(g·°C).
A steel ball bearing is 7 cm in diameter at 25C. A bronze plate has a hole that is 6.997 cm in diameter at 25C. What common temperature must they have in order for the ball to just squeeze throug
Suppose the skillet is cooled to room temperature, 21°C. How much heat energy (in joules) must be removed to effect this cooling? The specific heat of iron is 0.449 J/(g · °C).
A solution is prepared by mixing 51.0 mL of 0.20 M Pb(NO3)2 with 73.8 mL of 1.8 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6x10^-5.
a 3.00 g of pepsin is dissolved in enough water to make a 10.0 mL of solution. The osmotic pressure the solution is found to be 0.213 atm at 25 C. What is the molecular weight of pepsin?
a vinegar sample is found to have a density of 1.006 g/ml and to contain 8.3% acetic acid by mass. How many grams of acetic acid are present in 1.60L of this vinegar?
Given sigma(grainboundary, nickel)=2sigma(Ni/NiS), would you expect to have hot shortness in nickel when the sulfur concentration is high enough to form NiS?
If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated?
How many calories of heat are required to raise the temperature of 550 g of water from 12.0 "C to 18.0 "C? (remember the specific heat of water is 1.00 caVg x "C)
Construct the Kroger Vink diagram for the compound Cu2O where the principal defects are Schottky defects(copper vacancies are singly ionized and oxygen vacancies are doubly ionized).
Imagine that asteroid A that has an escape velocity of 50 m/s. If asteroid B has twice the mass and twice the radius, how would have its escape velocity compare to the escape velocity of asteroid A?
The reactant concentration in a first-order reaction was 7.30×10-2M after 15.0s and 4.40×10-3M after 65.0s . What is the rate constant for this reaction?
Calculate the pH of a solution that is prepared by dissolving two aspirin tablet(s) in one cup (237 mL) of solution. Assume the aspirin tablets are pure acetylsalicylic acid, Ka = 3.3 10-4.
Assuming that the temperature remains fixed and that dissipation can be ig- nored, what is the frequency with which the disc oscillates?
The observed density of hydrogen cyanide at 26 °C and 1.00 atm is 1.210 g / L. Calculate the apparent molecular weight of the gas.
The calorimeter contains 1.00 kg of water (heat capacity of H2O = 4.184 J/g C) and the heat capacity of the empty calorimeter is 0.10 kJ/ C. How much heat is released per gram of oil shale when it i
Pure ethanol has a density of 0.78945 g/cm ³ at 20.0 °C and 0.80625 g/cm³ at 0.0° C. What will be the difference in mass that a 500.0mL flask will hold at 0.0°C from that at 20
You need 100.00 mL of H2O and 5.00 mL of liquid plant food to make a solution for your plants. The density of liquid plant food is 1.21 g/cm3 and 1 cm3 = 1 mL. How much of the liquid plant food would
A 23.43 g sample of a substance is initially at 24.2 °C. After absorbing 2167 J of heat, the temperature of the substance is 122.0 °C. What is the specific heat (c) of the substance?