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Ammonium sulfide in solid form decomposes to ammonia gas and hydrogen sulfide gas. It is a reversible reaction The Kp at 25 degrees C is .109 In an experiment Ammonia gas and hydrogen sulfide gas each have a partial pressure of .5 atmospheres and are introduced into a 1 liter vessel. Calculate the number of moles of solid NH4HS that is present when equilibrium is established.
The initial pH of chloroacetic acid is 1.90, (which I found from using the quadratic equation to find x in a RICE table because I was given the initial concentration of 0.124M and told to find the pH of a 10.0 mL solution.)
95.0 mL of H_2O is initially at room temperature (22 C). A chilled steel rod at 2 C is placed in the water. If the final temperature of the system is 21.4 C, what is the mass of the steel bar?
What is the % barium in an alloy if it takes 22.0 mL of 0.875M sulfuric acid solution to react with all the barium in a 7.59 g sample of the alloy
With Niemann-Pick Disease, discuss how lipid metabolism is affected, particularly which enzyme(s), and how the body is affected
1 mole of a hydrocarbon of formula CnH2n was burned completely in oxygen producing carbon dioxide and water vapour only. It required 192 g of oxygen. Work out the formula of the hydrocarbon.
Write a stepwise mechanism using arrows to show movement of electrons for the reaction of 1-butyne with hydrogen bromide to produce 2,2-dibromobutane. CH3CH2CCH + 2HBr --------->CH3CH2CBr2CH3
in a coffee cup calorimeter at 23.5 degrees C, the temp rises to 30.17 degrees C. Calculate delta H of this reaction
A 25.0 mL sample of 0.150 M hydrofluoric acid is titrated with a 0.150 M NaOH solution. What is the pH at the equivalence point? The Ka of hydrofluoric acid is 4.50 × 10-4.
How much energy in joules is required to heat 295 mL of coffee from 25.0 0C to 62.0 0C? Assume that the coffee has the same density, 0.997 g/mL, and specific heat capacity, 4.184 rm J/(gc. K) .
What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'. What is the amino acid sequence that is coded by mRNA sequence 5' AAG GCU AGU GGC 3'
product and propose a mechanism when 1-pentene reacts with bromine and water followed by the addition of sodium hydride.
A 500 ml sample of O2(g) is at 780 mmHg and 30C. What will be the new volume if, with the constant pressure and amount of gas, the temperature is decreased to -15c
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