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The reaction of methane and water is a way to prepare hydrogen according to CH4(g)+H2O=CO2(g)+H2(g) a) If 995 g of CH4 reacts with 2510 g of water, how many moles of reactants and products are there
LASIK is a corrective surgical procedure intended to reduce a person's dependency on glasses or contact lenses by actually modifying the shape of the cornea, What is the average intensity during eac
Arrange the following atoms in order of decreasing atomic radius. Rank from largest to smallest. To rank items as equivalent, overlap them. Si, O, I, Ge
A rotating wheel requires 5.00 s to rotate 26.0 revolutions. Its angular velocity at the end of the 5.00-s interval is 99.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel
The hydration of carbon dioxide (add water to CO2) produces carbonic acid and is part of the equilibrium that controls carbon dioxide levels in the blood during respiration of vertebrate organisms.
the magnetic field 7.5 cm directly above the center of a 25 turn coil of radius 15cm is 0.80 mT. Find the current in the coil
The concentration of Na^+ in a 0.73 M Na2CO3 solution is: (Assume complete dissaciation) A. 0.43 M B. 0.88 M C. 1.02 M D. 1.28 M E. 1.46 M
Is a 0.15M solution of potassium benzoate C6H5COO-K+ acidic, basic, or neutral? Calculate the pH. The Kb for benzoic acid is 1.5 X 10-10.
At the low point in it swing, a pendulum bob with a mass of 0.46 kg has a velocity of 2.2 m/s. What is its kinetic energy at the low point
Exactly 100 mL of 0.15 M HNO2 is titrated with a 0.15 M NaOH solution. What is the pH at the equivalence point. The Kb of NO2- is equal to 2.2 x 10-11.
Find the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person (1.5m ) from an SR-71
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution? The Kb of ammonia is 1.8 x 10-5.
Two identical converging lenses have focal lengths of 15 cm and are aligned on the same principal axis. What is the total magnification of the two lenses
List the following in decreasing order of strength (from strongest to weakest): hypochlorous acid, choric acid, perchloric acid, chlorous acid. Explain what trend in these oxoacids is making them pr
An object is in front of a converging lens with a focal length of 11.0 cm. The lens produces a real image located 25.0 cm from the lens. what is the image distance of the new lens
Why could you have predicted that the pH would rise after addition of sodium acetate to pure 0.40 M acetic acid from part (a) by applying Le Chatelier's principle
An unknown piece of material with a mass of 5.1 kg and density of 1422 kg/m^3 is suspended from a string and then completely immersed in a container of water. Determine the volume of the piece of ma
Consider a mixture of salt NaA and weak acid HA. Please derive the pH Henderson Hasselback equation by writing the equilibrium expression. Define the pKa
An unknown compound contains only C, H, and O. Combustion of 4.40 g of this compound produced 8.79 g of CO2 and 3.60 g of H2O. What is the empirical formula of the unknown compound. CHO
What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (O) by mass. HCO
61.0 mL of a 1.70 M solution is diluted to a volume of 268 mL. A 134-mL portion of that solution is diluted using 119 mL of water. What is the final concentration
When the reaction 2 H2S g ~ PCl3 + Cl2 is carried out at 1065 degrees celcius, Kp = 0.012. Starting with pure H2S at 1065degrees, what must the initial pressure of H2S be if the equilbrated mixture
A two-slit pattern is viewed on a screen 1.05 m from the slits. If the two third-order minima are 25.0 cm apart, what is the width of the central bright fringe
Calculate the molarity of the following solutions. a) 0.600 mol of Na2S in 1.40 L of solution. b) 20.1 g of MgS in 851 mL of solution.
CaCO3(s)+2HCl(aq) -> CaCl2(aq) +H2O(l) +CO2(g) How many grams of calcium chloride will be produced when 27.0 g of calcium carbonate are combined with 12.0 g of hydrochloric acid. Which reactant i