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tooth enamel is mainly hydroxapatite,Ca10(PO4)6(OH)2. If 1.117g of tooth enamel reacts with acid to give 1.111g of calicul chloride, what is the percentage of hydroxyapatite in the tooth enamel sample?
How is the ideal gas law modified to account for the finite volume of molecules? The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the wo..
The rate of formation of ammonia in the reaction N2(g) + 3 H2(g) ? 2 NH3(g) was reported as 1.15 M/h (moles per liter per hour). What is the rate of disappearance of H2(g)
An essential amino acid is one that you cannot make at a rate consistent with the normal growth and maintenance, which of the following sets consists of only essential amino acids
An empty Erlenmeyer flask weighs 215.7 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 515.4 g.
Use a table of standard thermodynamic values to predict the standard cell potential at 81 C: Cu(s)|CuSO4||AgNO3|Ag(s) Assume that the values of delta H and delta S are independent of temperature.
Draw the structure of the major organic product formed in the reaction of 1-methylcyclohexene with ozone followed by dimethyl sulfide
A beaker with 145mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M
Calculate the temperature change which will be caused by the following process: 0.640 moles of NH4Cl are dissolved in 1.00 L of water.
Calculate the mass of glucose metabolized by a 79.7 kg person in climbing a mountain with an elevation gain of 1530m . Assume that the work performed in the climb is four times that required to simply lift 79.7kg by 1530m.
Which one of these equations describes a redox reaction?
Is it necessary to use the same solvent to dissolve the sample as is used to develop the tlc plate(TLC). Why
Decide if the compound/ion listed can satisfy the octet rule (duet rule for H), if so choose Satisfies Octet Rule from the drop down menu. If the compound/ion cannot satisfy the octet rule for one of the atoms in the formula, choose one of the fol..
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