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What volume of ammonia at 25 °C and 1.5 atm pressure is needed to produce 500 g of urea?
How many moles of phosphine (PH3) are produced for every 4.0 moles of hydrogen that react according to the chemical equation below?.
If 2.09 g SO2 react with excess oxygen and water, how many grams of H2SO4 are produced?
Suppose 108.3 g of hydrogen peroxide decomposes and all of the oxygen gas is collected in a balloon at 1.00 atm and 25oC. Determine the volume of the balloon.
Assume you dissolve 6.73 grams Na2CO3 in enough water to make 250 mL of solution. What is the molarity of the sodium carbonate?
On heating 5.03 g of hydrated barium chloride, 4.23 g is left behind. What is the name of this hydrate?
a 26.0 ml sample of a liquid was found to have a mass of 13.0g. what is the density of the liquid?
A buffer solution is prepared by mixing 0.500 L of 1.50 M HF and 0.400 L of 0.95M KF. What is the pH of this buffer? [Ka(HF) = 6.30 × 10-4]
A solution is prepared by mixing 79.0 mL of 5.00 M HCl and 34.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+ ], [OH - ], and the pH for this solution.
An alien rocketship is traveling at a speed of 40 inches per minute. At this speed, how many feet will it travel in 1 second? Round to the nearest thousandth.
The shielding of electrons gives rise to an effective nuclear charge,Zeff , which explains why boron is larger than oxygen. Estimate the approximate Zeff felt by a valence electron of boron and oxygen, respectively
Calculate the enthalpy of the reaction: 2NO(g) + O2(g) --> 2NO2(g) given the following reactions and enthalpies of formation: 1/2 N2(g) + O2(g) --> NO2(g), delta H *A = 33.2 kJ 1/2 N2(g) + 1/2O2(g) --> NO(g), delta H *B= 90.2 kJ
Calculate the volume of a chromium atom in microliters if the volume of a single chromium atom(Cr) =8.10E-24 cm 3 and determine how many copper(Cu) atoms would there be in 159 milligrams of Cu if The mass of a single Cu atom = 1.06E-22 grams.
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