Chemistry, 22.02.2021 19:10 isbella29

The percentage by mass of oxygen in a compound containing potassium, chlorine, and oxygen was determined experimentally. The technique used follows. solid (KClo compound is weighed. Then it is heated in a crucible. The The solid decomposes to produce oxygen gas and a salt. Because the oxygen escaping, mass of the original solid decreases. From the mass of oxygen lost and mass is the the percentage by mass of oxygen in of the original the original compound is determined. KClyo. (s) salt (s) O (g A student performs five trials and determines the following by mass of oxygen in the compound (KCLO) by mass of oxygen Trial in the compound 38.933 38,940 38,892 38.900 a. Determine the average experimental percentage oxygen in the compound. by mass of 30.933
b. If the actual value of the percentage by mass ofoxygen in this compound is 39.13 determine the percentage error.

Answers: 1

Show answers

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 02:10, kakesheco4210

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Answers: 3

continue

Chemistry, 22.06.2019 04:00, mgnbrnne

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

Answers: 2

continue

Chemistry, 22.06.2019 10:50, jaass28

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Answers: 2

continue

Chemistry, 22.06.2019 14:30, Giabear23

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

Answers: 3

continue

You know the right answer?

The percentage by mass of oxygen in a compound containing potassium, chlorine, and oxygen was determ...