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If 3.8 kcal is released by combustion of each gram of glucose, how many kcal are released by the combustion of 1.5 mol of glucose?
how many kilojoules of heat are released when 42.4 g of ch3oh at 55 degree celsius is cooled to 15.5 degree celsius.
The valence shell of the element X contains 2 electrons in a 5s subshell. Below that shell, element X has a partially filled 4d subshell. What type of element is X?
a sample of oxygen gas is collected over water at 25 degrees c and a total pressure of 637 torr. the volume of the gas
Calculate the percent composition of each element in the compounds Benzene(C6H6) and Acetylene(C2H2). Since these are different compounds with very different properties, it may seem that this is an exception to the law of definite proportions. Exp..
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?
what is the percent yield of a reaction in which 248 g phosphorus trichloride reacts with excess water to form 126 g
A solution, made by dissolving 62.07 g of a nonelectrolyte in 500 g of H2O, exhibits a freezing point of -1.86 °C. Determine the molecular weight of this nonelectrolyte compound? For water Kf = 1.86 °C m-1Kb = 0.51 °C m-1
calculate how many moles of the product form when 0.040mol of K completely reacts. Assume that there is more than enough of the other reactant. 4K(s)+O2(g)?2K2O(s)
Name some factors, besides weight and cost effectiveness, that one might consider when choosing one brand of antacid over another. Explain.
Calculate the overall (triangle)H degrees for the reaction shown given the bond dissassociation enrgies
platinum crystallizes with a face-centered cubic unit cell. the radius of a platinum atom is 139 pm. calculate the
consider the reaction of 215ml 2.15M nitric acid with 26.0 g of solid iron(2) carbonate for the following questions 1. write the balanced chemical equation for this reaction 2. which reactant is the limiting reactnat?
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