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Hydroxyapatite is the major mineral constituent of bone. The unit empirical formula for hydroxyapatite is Ca5(PO4)3(OH). List the elements found within hydroxyapatite in alphabetical order, written in lower case letters, and separated by commas and spaces (ex. element name, element name, element name...).
the common eastern mole a mammal typically has a mass of 69 g which corresponds to about 6.9 moles of atoms. a mole of
what is the compounds molar mass if the density of a gaseous compound of phosphorous is 0.943gl at 474k when its
which is an aqueous solution of acetic acid, HC2H3O2 , requires 24.5 mL of 0.450 M NaOH to reach the endpoint in a titration. What is the molarity of the acetic acid solution
The reaction of 2.30g N2 with excess H2 produces 2.00g NH3. The percent yield of this reaaction is?
Aluminum readily displaces hydrogen in sulfuric acid according the following balanced reaction: 2Al(s) + 3H2SO4(aq) = Al2(SO4)3(aq) + 3H2(g). How many grams of H2SO4 are required to completely consume 200.0 grams of Al
The question in the lab is asking what percentage by mass is the calcium, chloride and water in the orginal solution for each trial. In this lab we performed two trials, in each, we added 50 mL water to 2.0 g of CaCl2.
Consider the reaction CO(g)+ 3H2(g) CH4(g)+ H2O(g) with KC=4.1 x 105 at 773 K. The following amounts of substances are added to a 7.25 L reaction vessel: 0.103 moles CO, 0.205 moles hydrogen gas, 2.10 moles CH4 and 3.15 moles water vapor.
Explain in gory detail the relationship between temperature and vapor pressure. Lots of pictures might be helpful. Why does water expand when it freezes?
calorimetry can be used to find heats of combustion. suppose a calorimeter helps someone to determine that 4032 kj of heat is released during the combustion of 88.0 grams of propane, C3H8 (44.0 g/mol).
How many electrons are around the central atom in the expanded valence in I3-; where the 3 is subscript and the negative sign is superscript
If a 1-mole sample of a real gas from a compressed gas cylinder goes from 230 atm to 1 atm and from a volume of 1cm3 to 195cm3, what is the entropy change for the expansion if it is assumed to be isothermal.
What is the final state of the drink assuming instant heat transfer between the components (show how you arrived to this conclusion)
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