Chemistry, 14.08.2019 08:10 broomssymphonie
Nitrogen forms more oxides than any other element. the percents by mass of n in three different nitrogen oxides are (i) 46.69%; (ii) 36.85%; (iii) 25.94%. for each compound, determine (a) the simplest whole-number ratio of n to o, and (b) the number of grams of oxygen per 1.00 g of nitrogen.
Answers: 1
Chemistry, 22.06.2019 00:00
Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt
Answers: 3
Chemistry, 22.06.2019 11:40
Consider this equilibrium: n29) + o2(g) + 2no(c).nitrogen gas and oxygen gas react when placed in a closed container. as the reaction proceeds towards equilibrium, what happens to the rate of thereverse reaction?
Answers: 1
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) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°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, 23.06.2019 06:00
When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2β> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.
Answers: 1
Nitrogen forms more oxides than any other element. the percents by mass of n in three different nitr...
Mathematics, 20.12.2019 05:31
Mathematics, 20.12.2019 05:31
Mathematics, 20.12.2019 05:31
Mathematics, 20.12.2019 05:31
Mathematics, 20.12.2019 05:31
Mathematics, 20.12.2019 05:31