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What is the pH of a solution prepared by mixing 15.00 mL of a 0.3005 M solution of lactic acid with 15.00 mL of 0.1515 M NaOH? Ka for Lactic Acid= 1.4x10^-4
Two moles of gas A spontaneously convert to 3 moles of gas B in a container where the temperature and pressure are held constant. The sample originally took up 30.0L of volume. What is the new volum
A cylinder of compressed gas is labeIed "Composition (mole%) : 4.5% H2S, 3.0% CO2, 20% CO, Remaainder N2)." The pressure gauge attached to the cylinder reads 46 atm. Calculate the mole fraction and
Two liters of the alcohol are left in an open container at 22 degrees Celcius in a 12x12x8.0 ft room. After equilibrium is established what is the pressure of isopropyl alcohol vapor in the room? (1
What is the process for drawing them? Is there a procedure to follow to be able to draw the lewis structure of any element and compound? If so, what is it?
For each of the following molecules, determine what atomic orbitals on the central atom are allowed by symmetry to be used in the construction of sigma hybrid orbitals.
Suppose your friend thinks that perpendicular lines if neither line is vertical have slopes that are reciprocals of each other. How could you explain to your friend that this is incorrect
An arctic weather balloon is filled with 10.2L of helium gas inside a prep shed. The temperature inside the shed is 9(deg)C. The balloon is then taken outside, where the temperature is -21(deg)C. Ca
How many moles of bricks have a mass equal to the mass of the earth? Write answer as a decimal to one decimal place.
At the close of business, a store owner had $505 in 5 and 10 dollar bills in the cash register. if there was a total of 70 of these bills, how many of each denomination were there?
From a balloon 1106 ft high, the angle of depression to the ranger headquarters is 66 degrees 43'. How far is the headquarters from a point on the ground directly below the balloon to the nearest
A Cu/Cu2+ concentration cell is constructed in which both electrodes are pure copper. The Cu+2 concentration for one cell-half is 0.5 M, for the other it is 0.1 M. Is a voltage generated between the
How should he cut the molding to get the largest possible area for the print using the inside edge of the molding as the perimeter?
Combustion of a 0.200 g sample of an organice compound containing C/H/O gave 0.2998 g CO2 and 0.0819 g H2O. What is the empirical formula of the organic compound?
Strontium (Sr), with a mass number of 90 and an atomic number of 38, decays by beta emission. Identify the product of the nuclear reaction by providing its atomic symbol mass number and atomic numbe
Four guy wires are to be placed from the top of a 40-meter-tall radio tower to points 12 meters from the center of the base of the tower. What is the total length of the wire needed?
The foundation of a house has the following measurements: 60 feet by 40 feet by 2 feet. If cement costs $0.03 per pound and weighs 15 lb / cubic feet how much will the foundation cost?
(a) What is the composition of a liquid mixture that boils at 90 oC when the pressure is 19 kPa? (b) What is the composition of the vapor produced?
A pipe 4 inches in diameter and 6 feet 10 inches long is 3 quarters full of water. If 1 cubic foot of water equals 62.4 pounds, what is the weight of the base of the pipe?
It is found that the boiling point of a binary solution of A and B with XA = 0.4217 is 96 oC. At this temperature the vapor pressures of pure A and B are 110.1 kPa and 94.93 kPa respectively. (a) Is
The mixture is to sell for $13 per kilogram. Find how much of each should be used to make 180-kilogram mixture. How many kilograms of the Kenyan coffee should be in the mixture?
Question: The standard reaction Gibbs energy of the decomposition of CaCO3 to CaO and CO2 at 1173 K is 0.178 kJ mol-1. Calculate the equilibrium constant for the decomposition.
Christine went shopping and bought each one of her 6 nephews a gift, either a video that costing $14.95 or a CD costing $16.88. She spent a total of $95.49 on the gifts. How many videos and how m
Write a balanced equation for the photosynthesis reaction in which gaseous carbon dioxide and liquid water react in the presence of chlorophyll to produce aqueous glucose (C6H12O6) and oxygen gas.
The two games together earn $3725.50 for the team. Thursday's game generates $397.50 less than Sunday's game. How much money was taken in at each game?