Chemistry, 20.08.2021 21:50, ranchgirljls
Some trees have purple leaves. The purple colour is a mixture of coloured pigments.
Plan an experiment to extract and separate the coloured pigments present in the purple leaves.
You are provided with some purple leaves, sand, ethanol and common laboratory apparatus​
Answers: 2
Chemistry, 22.06.2019 16:30, Eddie997
For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.
Answers: 2
Chemistry, 23.06.2019 04:20, milkshakegrande101
The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.
Answers: 1
Chemistry, 23.06.2019 09:30, oscarruiz
The allotropes of carbon include a variety of structures that include three-dimensional tetrahedral lattices, planes of hexagonal rings, cylindrical tubes of hexagonal rings, and spheres of five- and six-membered rings. similar shapes of network covalent atomic solids are possible with carbon nitride, boron, and pure silicon (e. g., silicene is a graphene-like allotrope of pure silicon). in contrast, silicates exist as either highly ordered or amorphous (more random) three-dimensional lattices. what could explain why there are there no naturally occurring sheets, stacked sheets, cylindrical tubes, or spheres of network covalent atomic solids composed of silicon and oxygen (sio2)? would pure silicate structures make good lubricants or good electrical conductors?
Answers: 3
Some trees have purple leaves. The purple colour is a mixture of coloured pigments.
Plan an experi...
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