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In a controlled greenhouse at 30.0C and 1.0 atm a crop of seeding tomato plants was found to consume 380 L of carbon dioxide gas during photosynthesis. Assuming 100% yield what a mass of glucose was
She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of KOH for the final solution.
how many grams of water can be produced by the reaction of 2.40 mol of C2H2 with 7.4 mol of O2?
what is the theoretical yield of zinc iodide, if a 2.0-g sample of zinc was used with 6.5 grams of iodine.
Consider the titration of 50.00 mL of 0.1000 M HNO2 (Ka = 7.1•10-4) with 0.1000 M NaOH solution. What is the pH after the addition of 15.00 mL.
What does it mean to say that a proton is hydrated, and how will the heat of hydration affect the measured heat flow for neutralization reaction?
If the reaction rate doubles when the temperature is increased to 35 ^circ {rm C}, what is the activation energy for this reaction in {rm kJ}/{rm mol}?
When α-D-xylofuranose is treated with excess methyl iodide in the presence of Ag2O, how many equivalents of methyl iodide react with each equivalent of the furanose?
A graduated cylinder contains 129 of water. A 12.0 piece of iron (density = 7.86 ) and a 15.0 piece of lead are added. What is the new water level in the cylinder?
How many grams of formic acid, HCOOH, must be added to 0.300 L of 0.110 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.10? Assume no volume change. Ka of HCOOH = 5.0 10-4.
In a gas mixture, the partial pressures are argon 447 mm Hg, neon 77 mm Hg, and nitrogen 144 mm Hg. What is the total pressure (atm) exerted by the gas mixture?
A solution of 120 mL of 0.150 M KOH is mixed with a solution of 280 mL of 0.250 M NiSO4. How many grams of the precipitate can be formed?
Organic reactions can be classified as substitutions, eliminations or additions and the reagents can be classified as electrophiles, nucleophiles or radicals.
If the pressure of chloroform vapor in a flask is 154 mm Hg at 25.0°C, and the density of the vapor is 1.25 g/L, what is the molar mass of chloroform?
at 986°C is 0.63. A rigid cylinder at that temperature contains 1.2 atm of carbon monoxide, 0.20 atm of water vapor, 0.30 atm of carbon dioxide, and 0.27 atm of hydrogen. Is the system at equili
A 45- piece of ice at 0 is added to a sample of water at 22. All of the ice melts and the temperature of the water decreases to 0 . How many grams of water are in the sample?
The other main peaks appeared at m/z = 71 and 43. Suggest a possible structure for this ketone and briefly explain your reasoning.
In a test on the vaporization of water into air in a wetted-wall column, the following data were obtained: Tube diameter= 1.46 cm. Calculate the rate of mass transfer of water in air.
A gas is heated from 255 K to 284 K while its volume is increased from 24.0 L to 32.0 L by moving a large piston within a cylinder. If the original pressure was 1.08 atm, what would be the final pr
A particular first-order reaction has a rate constant of 1.35 × at 25°C. What is the magnitude of k at 95°C if = 55.5 kJ/mol?
An equimolar mixture of hydrogen and deuterium effuses through an orifice at a certain temperature. calculate the composition (in mole fractions) of the gas that passes through the orifice
The product ethane (C2H6) has a volume of 50.0 mL. Calculate the amount of PV work done, and tell the direction of the energy flow.
If 12.5 g of iron(III) oxide (rust) are pro- duced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
When 415 J of heat is added to the gas, it expands and does 106 J of work on the surroundings. What is the value of Delta H for this process? What is the value of Delta E for this process?
Oxygen makes up 46.7 % by mass of the Earth's crust. How many grams of oxygen are present if a sample of the Earth's crust has a mass of 335 g .