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The decomposition of Phosphine, PH3(g), to P4 (g) and H2 is first order with rate constant of 1.1 min-1 a) How long will it take to decompose one fifth of the Phosphine? b) What percentage of Phospine is decomposed after 1.25 min? c) How long will it take to decompose one fifth of the phosphine?
Calculate the molarity of a solution made by dissolving 0.0715 mol Na2SO4 in enough water to form 550 mL of solution.
A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl. What is the pH of the solution after 23.0 mL of HCl have been added to the base?
The water level in a graduated cylinder initially at 211 rises to 282 after a piece of lead is submerged. What is the mass in grams of the lead.
Chemistry of Proteins and Hemoglobin - What is the effect of the following changes on the O 2 affinity of hemoglobin?
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
This assignment inhibits chemistry Laboratory Questions.
How much heat (in kJ ) is required to warm 12.0 grams of ice, initially at -12.0 Celsius, to steam at 112.0 Celsius? The heat capacity of ice is 2.09 J/g*Celsius and that of steam is 2.01 J/g*Celsius?
Calculate the ratio of rates of effusion of O2 versus Cl2. Record your answers to three significant figures. The concentration of CO2 in the atmosphere is 375ppm (by volume). What is the mole fraction of CO2 in the atmosphere?
Draw the organic product formed when the structure shown below undergoes
Write the reactions for the preparation of the diaonuim salt for the coupling of the salt with the sodium salt of 2-napthol.
If you mix 10.0 grams of CH3SH with excess CO and 8.65 grams of CH3COSCH3 is produced, what is the percent yield of the CH3COSCH3?
Hexane has a density of 0.659g/mL to the third at 20 degrees C. How many mL are needed to have 30.0g of liquid.
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