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A student poured the hydrogen peroxide unknown into a clean, wet erlenmeyer flask. The stdent thought that as long as the flask was clean, this preactice would not lead to an error in the results? Briefly explain.
MnSO4 is converted to MnO2 in a basic medium as oxygen gas is converted to hyroxide ion. In this case, is the sulfate ion a spectator ion. (NaOH is also present. Is sodium ion also a spectator ion) A. Print the oxidation half-equation B
Hydrogen sulfide, H2S, is a toxic gas responsible for the odor of rotten eggs. The solubility of H 2 S (g) in water at STP is 0.195M.What is the Henry's-law constant of H2S at 0 ° C?
Which of the following reactions notate the formation reaction of CO(g)? 1. C(s) + 1/2 O2(g) ? CO(g) 2. CO(g) ? C(s) + 1/2 O2(g) 3. 2C(s) + O2(g) ? 2 CO(g)
Tests on a sphere are conducted in a wind tunnel at an air speed of U0. the velocity of flow toward the sphere along the longitudinal axis is found to be u=-U0(1-r0^3/x^2) where r0 is the radius of the sphere and x is the distance from its center.
a student placed 15.5 g of glucose c6h12o6 in a volumetric flask added enough water to dissolve the glucose by swirling
What amount of energy is required to melt a 13.5 g piece of ice at 0oC to form liquid water at the same temperature of 0? The heat of fusion of water = 333 J/g , T he specific heat of H2O is approx. constant at 4.18 J/g x C.
compute the amount of heat essential to fully sublime ninety grams of solid dry ice co2 at its temperature of
An X-ray photon of wavelength 0.962nm strikes a surface. The emitted electron has a kinetic energy of 944eV. Find binding energy.
Calculate (a) the mole fraction of the solute, (b) the number of moles of solute in the solution, and (c) the molecular mass of the solute.
A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.124 g sample was studied by combustion analysis, 0.223 g of CO2 and 0.0301 g of H2O formed. How many moles of e..
Firefly luciferase is the enzyme that allows fireflies to illuminate their abdomens. Because this light generation is an ATP-requiring reaction, firefly luciferase can be used to test for the presence of ATP.
Calculate the binding energy E B of the helium nucleus 4 /2 He .Express your answer in millions of electron volts to four significant figures.
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