Chemistry, 26.03.2020 00:46 bri2576

I need to know what is oxidized and what is reduced.

1. 2CoS(s) + 3O2(g) > 2CoO(s) + 2SO2(g)

2. 2Al(s) + 3F2(g) > 2AlF3(s)

3. ZnO(s) + H2(g) > Zn + H2O(g)

Answers: 3

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 05:30

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

Answers: 1

Answer

Chemistry, 22.06.2019 12:30

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

Answers: 3

Answer

Chemistry, 22.06.2019 22:30

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.

Answers: 1

Answer

Chemistry, 23.06.2019 01:30

Some molecular compounds, such as hcl, ionize completely in solution. for molecular compounds such as h2co3, most molecules do not ionize in solution. which describes the properties of these two solutes? a. hcl and h2co3 have the same effect on the properties of the solution. b. hcl raises the freezing point of water more than h2co3 does. c. hcl raises the boiling point of water more than h2co3 does.

Answers: 2

Answer

You know the right answer?

I need to know what is oxidized and what is reduced.

1. 2CoS(s) + 3O2(g) > 2CoO(s) +...

Questions