Chemistry, 24.10.2020 04:20 delaneymaufroy29

Which of these is an example of a chemical change? A. Lighting a match
B. Freezing water
C. Tearing up a piece of paper
D. Dissolving sugar in water

Answers: 1

Show answers

Another question on Chemistry

Chemistry, 22.06.2019 08:30

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Answers: 3

Answer

Chemistry, 22.06.2019 14:00

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Answers: 3

Answer

Chemistry, 23.06.2019 03:30

What 3 categories are elements divided

Answers: 1

Answer

Chemistry, 23.06.2019 04:40

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity

Answers: 1

Answer

You know the right answer?

Which of these is an example of a chemical change? A. Lighting a match
B. Freezing water

Questions

Chemistry, 10.05.2021 19:00

Iron ore exists as Fe2O3. In order to remove the oxygen and generate pure iron, the oxygen must be transferred to another molecule. Carbon monoxide ca...