WhicII UT LIICIT
13.
A. (i) only B. (ii) only C. (iii) only D. (1),(11)&(111)
Use the...
Chemistry, 23.03.2021 22:10 Dogtes9667
WhicII UT LIICIT
13.
A. (i) only B. (ii) only C. (iii) only D. (1),(11)&(111)
Use the following data to answer questions 14 to 18
0.66g of an organic compound was subjected to Kjeldahl determination and the ammonia
produced was collected in 50cm' of 1.0M hydrochloric acid. On dilution to 250cm”, the acid
was titrated against 25.0cm portions of 0.1M sodium hydroxide solution. 31.25cm of acid was
required for each titration. [N=14; 0=16; H=1; C=12]
14. The number of mole of sodium hydroxide in 25cm' of the base is: A. 0.0023 B. 0.0022 C.
Answers: 3
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Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:
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What does the field of thermodynamics relate to a-changes in nuclear reactions b- changes in energy in systems c changes in molecular structure d changes in atomic properties
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How many grams of iron can be made from 16.5 grams of fe2o3
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Water is a highly important natural resource. which of these would be the best method to conserve water? a) drinking bottled water b) monitoring the ph of rivers c) treating and re-using wastewater d) testing nitrate levels in groundwater
Answers: 1
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