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PERCENTAGE COMPOSITION WORKSHEET
3 mol Mg x 24.30 g Mg = 72.90 g Mg ÷ 262.84 g x 100 = 27.74 % Mg. 1 mol Mg. 2 mol P x 30.97 g P = 61.94 g P ÷ 262.84 g x 100 = 23.57 % P. 1 mol P. 8 mol O x 16.00 g O = 128.00 g O ÷ 262.84 g x 100 = 48.70 % O. 1 mol O +_____ 262.84 g Mg3(PO4)2. 2. What is the percentage of lithium (by mass) in lithium arsenate? ...
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[DOC File]Experiment 5: EDTA Determination of Calcium and Magnesium
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0.016 mol / L x 40.078 g / mol x 1000 mg / g = 641 mg / L = 641 ppm Note: 40.078 g is the MW of Ca; total calcium is reported in terms of calcium even though both Mg and Ca are present in the sample. In a typical water sample, more calcium salts are present than magnesium salts.
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[DOC File]Definicion de Mol para Tercero de Secundaria
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¿Cuántos mol - g existen en 1400 g de cal viva (CaO)? a) 5 b) 10 c) 15. d) 20 e) 25. La leche de magnesia contiene hidróxido de magnesio Mg(OH)2. ¿Cuántos gramos de este compuesto están contenidos en 2 mol - g de este compuesto? P.A(Mg = 24) a) 116 g b) 54 g c) 41 g. d) 82 g e) 123 g. Se sabe que 2 mol - g de A2B3 pesan 210 g. Determine ...
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[DOC File]T5: Quantitative Chemistry
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Molar masses: Mg = 24 g/mol, N = 14 g/mol. So amounts which combine are: of Mg atoms combines with of N atoms. i.e. 0.120 mol of Mg atoms combines with 0.0800 mol of N atoms (c) Divide through by the number of moles which is smallest. mol of Mg combines with mol of N. i.e. 1.50 mol of Mg atoms combines with 1.00 mol of N atoms (d)
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[DOC File]CHAPTER 3 - STOICHIOMETRY
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grams (NH4)2SO4 = 70. g H2SO4 x 1 mol H2SO4 x 1 mol (NH4)2SO4 x 132.1 g (NH4)2SO4, 98.08 g H2SO4 1 mol H2SO4 1 mol (NH4)2SO4 = 94 g Since the calculation based on available H2SO4 yields less ammonium sulfate, it means that H2SO4 is the limiting reagent, and the maximum amount of (NH4)2SO4 expected is 94 g.
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[DOCX File]urip.files.wordpress.com
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⇒ mol NH 3 mol NH 4 Cl = 1 ⇒ mol NH 3: mol NH 4 Cl = 1 : 1 Jawab:B Garam CH 3 COONa berasal dari asam lemah (CH 3 COOH) dan basa kuat (NaOH) sehingga bersifat basa karena terhidrolisis sebagian menghasilkan ion OH
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[DOC File]Organic Chemistry
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45 mmoles PBr3; convert to grams _____ g (hint: recall 1000 mmol = 1 mol) c. 500 mg ethyl bromide; convert to mL _____ mL (hint: recall 1000 mg = 1 g) Questions 3-7 pertain to the unbalanced chemical reaction: 3. Provide the stoichiometric factors to balance this chemical reaction.
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[DOC File]Stoichiometry: Mole to Mass Problems
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4. 3 Mg + 1 Fe2O3 ( 2 Fe + 3 MgO. How many moles of iron, Fe, are produced with 25.0 grams of magnesium, Mg? 0.686 mole Fe. 5. Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction. NH4NO3(s) ( N2O(g) + 2H2O(l)
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Chapter 3: Mass Relationships in Chemical Reactions
A) 43 g/mol B) 76 g/mol C) 151 g/mol D) 162 g/mol E) 125 g/mol. Ans: C Category: Easy Section: 3.3. 34. What is the molar mass of nicotine, C10H14N2? A) 134 g/mol B) 148 g/mol C) 158 g/mol D) 210 g/mol E) 162 g/mol. Ans: E Category: Easy Section: 3.3. 35.
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[DOC File]Mennyiségi alapismeretek
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g, mg. 1kg=1000g. 1g=1000mg térfogat V SI egysége: m3. kémiában gyakran: dm3, cm3, l, ml. 1m3=1000dm3. 1dm3=1000cm3. 1l=1dm3. 1ml=1cm3 részecskék száma N – (mértékegység nélküli szám) – anyagmennyiség n SI egysége: mol. kémiában gyakran: mmol, kmol. 1mol=1000mmol. 1kmol=1000mol NA-Avogadro-szám: 6∙1023 sűrűség ( SI ...
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G mol to mg mol