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A gas sample has an original volume of 500 ml when collected at 730 mm and 20oC. What will be the volume of the gas sample if the pressure increases to 800 mm and the temperature increases to 40oC? A gas sample has an original volume of 650 ml when collected at 750 mm and 30oC. If a change is made in the gas temperature which causes the volume of the gas sample to become 800 ml at 1.00 atm, what is the new temperature? A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 liters when collected at 30oC. What would be the pressure of the gas sample?
Chemical Kinetics - Determine the time taken by a reactant to reach a particular concentration
The compound is composed of 41.39% carbon, 3.47% hydrogen and 55.14% oxygen. The molecular mass is 116.07 g/mol. What is the molecular formula?
The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium
The root-mean-square speed of CH4 molecules at 25°C is about 0.56 km/s. What is the root-mean-square speed of a H2 molecule at 25°C?
A mixture of pentane and hexane has a vapor pressure of 258 torr. The standard vapor pressure of pentane is 425 torr. What is the mole fraction of pentane?
400cm3 of glycerol, C3H8O3 (density= 1.26 g cm-3) is added to a kilogram of water. What is the mole fraction of C3H8O3 in the solution?
Why do we measure the volume of the flask with water rather than using the volume listed on the side?
A 16.0 ounce specially drink contains 349 mg caffeine. what is the concentration of caffeine in this solution? one fluid ounce is equivalent to 29.57ml. the formula for caffeine is c8H10N4O2
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes
Using the rydeberg equation calculate the energy of the transition from lowest state, n=1, to the highest, n= infinity, for hydrogen atom.
When Methane is burned with oxygen, the products are carbon dioxide and water. If you produce 9gms of waterand 11grams of carbon dioxide from 4gms of methane only 16gms of oxygen were needed.
A mass of mercury occupies 0.750 L. What volume would an equal mass of ethanol occupy? The density of mercury is > and the density of ethanol is 0.789 g/mL.
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