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incandescent white of a fireworks display is caused by the formation of p4o10 which occurs by the combustion of
the purity of gold alloys is expressed in karats which is the mass fraction of gold multiplied by 24 pure gold is 24 kt
the greek mathematician archimedes is credited with discovering how to verify the amount of pure gold in an irregularly
compute the number of electrons in a flake of pure gold valued at 044 assume that the price of gold is 16300troy oz 1
a catalyst may be defined as a substance that enhances the rate of a chemical reaction without being consumed in the
water from a 5-ml pipet was drained into a weighing bottle whose empty mass was 9974 g to give a new mass of 14974 g at
what volume of concentrated hcl 12 m and what weight of solid tris-hydroxymethylaminomethane as the base are required
aluminum has a specific heat of 0902jgxc how much heat is lost when a pieve of aluminum with a mass of 23984 g cools
a 01510 gram sample of hydrocarbon produces 05008 gram co2 and 0128 gram h2o in combustion analysis its molecular
from the following chemical equation determine how many grams of caoh2 you would need to react with 626 moles of hbr
given that a 1200 g milk chocolate bar contains 9200 g of sugar calculate the percentage of sugar preset in 1200 g of
nutritional tables give the potassium content of a standard apple 3 appleslb as 159 mg how many grams of potassium are
balloons are still used to deploy sensors that monitor meteorological phenomena and the chemistry of the atmosphere it
1 explain the difference in the co stretches in 2-naphthaldehyde and benzophenone2 based on what you know about
ethane gas c2h6 burns in oxygen to form carbon dioxide gas and gaseous water at constant 160 kj of heat is evolved when
an 180 g sample of magnesium is completely burned in the presence of air to form magnesium oxide what is the mass of
a thief uses a bag of sand to replace a gold statue that sits on a weight sensitive alarmed pedestal the bag of sand
the us food and drug administration fda recommends the you consume less than 24 g of sodium per day what mass of sodium
given that a 1200 g milk chocolate bar cotains 9200 g of sugar calculate the percentage of sugar preset in 1200 g of
a buffer solution contains 01 m ch3cooh and 01 m sodium acetate that is it has 02 m total buffering components of
calculate the vapor pressure of water above a solution prepared by dissolving 350 g of glycerin c3h8o3 in 140 g of
calculate qwdelta udelta h if 165mol of an ideal gas with cvm 3r2 undergoes a reversible adiabatic expansion from an
if an audiotape playing at a speed of 1875 in s -1 takes 450 min to play through one side what is the length of the
assuming that the solute consists entirely of nacl over 90 is calculate the osmotic pressure of seawater at 20 degrees