subject
Chemistry, 07.09.2021 03:40 Papichulo3806

1 2 3 4 5 6 7 8 9 10 TIME REMAINING
16:33:17
When two substances are mixed together, a color change is observed. Does this mean that a chemical reaction has definitely occurred?
Yes because any change indicates a chemical reaction.
No because some physical changes produce color changes.
No because color changes are not indicators of chemical reactions.
Yes because color changes occur only when new compounds are formed.
Mark this and return

ansver
Answers: 3

Another question on Chemistry

question
Chemistry, 22.06.2019 15:20
Select the most likely product for this reaction: koh(aq) + co2(g) ā€“ ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2
Answers: 2
question
Chemistry, 23.06.2019 03:20
High-pressure liquid chromatography (hplc) is a method used in chemistry and biochemistry to purify chemical substances. the pressures used in this procedure range from around 500 kilopascals (500,000 pa) to about 60,000 kpa (60,000,000 pa). it is often convenient to know the pressure in torr. if an hplc procedure is running at a pressure of 1.03Ɨ108 pa , what is its running pressure in torr?
Answers: 3
question
Chemistry, 23.06.2019 14:00
[07.06] which of the following chemical reactions is an oxidation-reduction reaction? (2 points) wo3 + 3h2 yields w + 3h2o kno3 + licl yields lino3 + kcl caso4 + 2nacl yields na2so4 + cacl2 mg(no3)2 + 2hbr yields mgbr2 + 2hno3
Answers: 1
question
Chemistry, 23.06.2019 15:40
Sugar is made up of clear, colorless crystals that dissolve easily in water, but the crystals and their solution do not conduct electricity. which statement describes sugar? it is made up of atoms that are held together by metallic bonds. it is made up of atoms that are held together by covalent bonds, it is made up of atoms that are held together by weak ionic bonds. it is made up of atoms that are held together by strong ionic bonds.
Answers: 1
You know the right answer?
1 2 3 4 5 6 7 8 9 10 TIME REMAINING
16:33:17
When two substances are mixed together, a...
Questions
question
Mathematics, 13.01.2021 21:20
question
Mathematics, 13.01.2021 21:20
question
Mathematics, 13.01.2021 21:20
question
Mathematics, 13.01.2021 21:20
question
Mathematics, 13.01.2021 21:20
question
Arts, 13.01.2021 21:20
question
Mathematics, 13.01.2021 21:20
Questions on the website: 13722363