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ãÓÇÚÏÉ Ýí ßíãíÇÁ ÚÇãÉ 110 ÖÑæÑí

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ÞÏíã 20-12-2010, 02:51 PM

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calculate the number of moles of fe produced from 1.25moles of fe2o3 by the following reaction
fe2o3+3c____>2fe+3co
a)1.25 b)2.5 c)0.82 d)0.62


balance the following equation.what is the sum of the coefficients of the reactants and product?
C7H16+____O2_____>___CO2+___H2O
a)21 b)18 c)27 d)24

balance the following equation.what is the sum of the coefficients of the reactants?
C6H10O5+___ O2____>___ CO2+___H2O
A)7 B)11 C)6 D)3 E)18

how many grams of maltose(C12H22O11)are required to make 1.50L of 0.800M solution?

a)285.2gram b)641 c)410.4gram d)182.5gram

the type of O-H bond in the water molecule is:

a)ionic bond b)hydrogen bond c)polar covalent bond d)covalent bond


in the following reaction how many grams of Ag2S can be produced from 0.950 g of Ag?

2Ag(s) +S(S)___>Ag2S

a)0.620g b)0.827 c)1.09g d)2.20g


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