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A particular brand of gasoline has a density of 0.737 rm g/mL. How many grams of this gasoline would fill a 14.4 gal tank?
If the average human body discharges 716 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft?
A compound contains 10.13% C, and 89.87% Cl (by mass). Determine both the empirical formula and the molecular formula of the compound given that the molar mass is 236g/mol
A gas mixture contains each of the following gases at the indicated partial pressures: N2, 335 torr; O2, 124torr ; and He, 209 torr . What is the total pressure?
Calculate the value of the rate constant, What is the overall order of the reaction?
At the conclusion of the experiment, the total pressure in the flask is 652. torr. What is the pressure of N2 in the flask?
A gas company charges $1.30 for 15.0 cubic feet of natural gas. (a) Convert this rate to dollars per liter of gas. (b) If it takes 0.304 cubic feet of gas to boil a liter of water, starting at room
A 32.0-g sample of water at 290. K is mixed with 51.0 g water at 320. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Calculate the mole fractions of Fe3+ and SCN- in this solution with respect to the total number of moles of Fe3+ and SCN-. This means, of course, that these two mole fractions should add up to 1.00.
What will be the concentration of in the battery after 3.40 of current is drawn from the battery for 4.50? Express the molar concentration numerically.
A solid block of exactky 100.0 cm 3 has a mass of 153.6g. Determine its density. Will the block sink or float on water?
Calculate the specific heat of a metallic element if 478 J of energy are needed to raise the temp. of a 82.73 g sample from 25.0 C to 50.0 C. what is the most likely identity of the element.
Suppose that after delivery several drops of the water cling to the inner wall of the pipet (because the pipet wall is dirty). How does this technique error affect the reported density of water?
Calculate the amount of heat transferred when 2.7 g of {rm Mg}({rm s}) reacts at constant pressure.
Avogadro's number is big. If you had 6.02 x 1023 dollars, and could spend it at 1 billion (109) per second for your entire life (about 75 years), what approximate percentage of your original money
if the total amount of energy emitted by a carbon sample is 1.98x10^5 J, determine the number of carbon atoms present in the sample, assuming that each atom emits one photon
When 24 copper pennies are submerged in water, the pennies displace 8.26 cm3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper?
A reaction in water causes the water in beaker to cool from 25 degrees Celsius to 21 degrees Celsius. The volume of water 150ml (d=1.0g/ml). What is the heat absorbed by the reaction?
Water's heat of fusion is 80. , its specific heat is 1.0, and its heat of vaporization is 540 . A canister is filled with 350 of ice and 100. of liquid water, both at 0 . The canister is placed in a
An aqueous solution contains 12.7% NaCl by mass. What mass of water (in grams)is contained in 2.5L of the vapor above this solution at 55 celcius? the vaor pressure of pure water at 55 celcius is 11
What mass of sucrose should be combined with 478 of water to make a solution with an osmotic pressure of 8.60 at 320 ? (Assume the density of the solution to be equal to the density of the solvent.
What are the lewis dot structures for k2so4, Ca3N2, C6H14, C2H4, CH3CH2, OOOH
how many calories of heat energy was absorbed? Express our answer numerically in calories using two significant figures.
Suppose that 0.82 g of water condenses on a 80.0 g block of iron that is initially at 24 C.If the heat released during condensation goes only to warming the iron block, what is the final temperatur
an automobile gasoline tank holds 21 kg of gasoline. When gasoline burs, 81 kg of oxygen is consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and