Chemistry, 04.08.2019 18:40 sleepqueen
In the redox reaction below, which is the reducing agent? mno2 (s) + 4h+(aq) + 2clmc007-1.jpg (aq) mc007-2.jpg mn2+(aq) + 2h2o(l) + cl2(g)
Answers: 1
Chemistry, 22.06.2019 02:10
When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)
Answers: 3
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 22:30
What is the value of the standard enthalpy of formation of an element in its most stable form?
Answers: 3
In the redox reaction below, which is the reducing agent? mno2 (s) + 4h+(aq) + 2clmc007-1.jpg (aq)...
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