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Which force among the dispersed particles of a colloid helps prevent heavy aggregates from forming? van der Waals forces gravitational attraction electrical attraction electrical repulsion
. electric force is responsible for the repulsion between two positively-charged particles
Expert answered|Moja2013|Points 7|
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Asked 4/10/2013 8:00:20 AM
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what is the maxium number of grams of ph3 that can be formed when 6.2 g of phosporus reacts with 4.0 g of hydrogen to form ph3
Weegy: moles P4 = 6.2 g/ 123.895 g/mol=0.050 moles H2 = 4.0 g/ 2.016 g/mol=2.0 ( in excess) moles PH3 = 0.050 x 4=0.20 mass PH3 = 0.20 mol x 33.9978 g/mol= 6.8 g User: in a particular reaction between copper metal and silver nitrate, 12.7 g of Cu produced 38.1 g of Ag. what is the percent yield of silver in this reaction? (More)
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Asked 4/4/2013 8:01:37 AM
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In a particular reaction between copper metal and silver nitrate, 12.7 g of Cu produced 38.1 g of Ag. what is the percent yield of silver in this reaction?
Weegy: In a particular reaction between copper metal and silver nitrate 12 7 g cu produced 38 1 g ag what is the percent yield of silver in this reaction. [ ] (More)
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Asked 4/4/2013 8:07:40 AM
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hydrogen gas is produced when zinc reacts with hydrochloric acid. If the actual yield of this reaction is 85%, how many grams of zinc are needed to produce 112 L of h2 at STP
Weegy: Hydrogen gas is produced when zinc reacts with hydrochloric acid. [ [ If the actual yield of this reaction is 85%, 380 g of zinc are needed to produce 112L of H2 at STP. -Start with a balanced chemical equation Zn + 2 HCl - > ZnCl2(aq) + H2 112L H2 x (1 mol H2 / 22.4 L H2) x (1 mol Zn / 1 mol H2) x (65.4 g Zn / 1 mol Zn) = 327 g Zn But that is if you had 100% yield. Only 85% of the Zn that was present produced H2, so divide 327 by ... (More)
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Asked 4/4/2013 8:40:41 AM
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lead nitrate can be decomposed by heating. what is the percent yield of decomposition reaction if 9.9 g of Pb(NO3)2 are heated to giv 5.5 g of PbO
Weegy: its 56% User: which of the following is NOT true about limiting and excess reagents? A. the amount of product obtained is determined by the limiting reagent. B. some of the excess reagent is left over after the reaction is complete C. a balanced equation is necessary to determine which reactant is the limiting reagent D. the reactant that has the smallest given mass is the limiting reagent. (More)
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Asked 4/4/2013 8:21:01 AM
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