Tooth enamel is the hardest substance in the body and is mainly the mineral  hydroxyapatite, Ca10(PO4)6(OH)2. If 1.125 g of tooth enamel reacts with hydrochloric acid to give 0.975 g of CaCl2, what is the percentage of hydroxyapatite in tooth enamel?      Ca10(PO4)6(OH)2(s)  +  20 HCl(aq) → 10 CaCl2(aq)  +  6 H3PO4(aq)  +  2 H2O(l)

Q: Consider the following Lewis structure and table of bond energies. What is the total sum of the bond…

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Q: Examples H Show Transcribed Text Н 0 Н Н Н НО НО а Н Н H

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Q: 1. Write the formulas of the following compounds and decide which are soluble in water. (a) sodium…

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Q: Part B [Kr]582 4d10 Spell out the full name of the element. Submit Request Answer ▾ Part C [Xe]6g2…

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.