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soldier1979 [14.2K]
2 years ago
14

Describe a chemical test for water-

Chemistry
1 answer:
Mila [183]2 years ago
6 0

Answer:

Anhydrous copper (II) sulphate is white because it has no water in it. When drops of water are added, copper (II) sulphate turns blue. This colour change can be used to detect the presence of water (or water vapour).

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How many independent variables are allowed in an experiment
Dmitriy789 [7]

one independent variable

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2 years ago
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Ok, I need help with this one!!!!!!!!!!!!!!!!!!!! plz and thank you
Kitty [74]

Answer:

D)

Explanation:

3 0
3 years ago
Which formula correctly represents the product of an addition reaction between ethene and chlorine?
Serjik [45]
The formula that correctly represents the product of an addition reaction between ethene and chlorine is  C2H4Cl2
Addition reaction occurs when an atom is added to a compound that has a double bond or triple bond (unsaturated hydrocarbons). Unsaturated compounds are associated with addition reactions. For example Ethene is an example of unsaturated hydrocarbon; when reacted with chlorine gas , chlorine atoms are added to each carbon atoms. 
4 0
3 years ago
Draw the structures of the two monomers that react together to form this polyurethane polymer
matrenka [14]

The monomers that react together to form polyurethane polymer are diisocyanate and diol.

<h3>What are polymers?</h3>
  • Polymers are a class of natural or synthetic substances
  • It is made up of small units called monomers arranged in a repeated pattern to form large molecules called macromolecules
  • Cellulose and resins are examples of natural polymers
  • Polyethylene and polychloroprene are examples of synthetic polymers.

Polyurethane polymer is made up of monomers diisocyanate and diol. It is mostly used in home furnishing in flexible form. The structures of monomers are as follows:

Learn more about polymers:

brainly.com/question/17638582

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7 0
1 year ago
Use the data in the simulation to find the Ka value of HF, hydrofluoric acid
Dmitry_Shevchenko [17]
We need to find the Ka value of HF. First, set up the balanced chemical equation:

HF ===> H+ + F-

The formula for the Ka value of an acid is

Ka = [concentration of products] / [concentration of reactants]

Ka = [H+] [F-} / [HF]

So if we are given the concentration of the products and reactants, we will be able to solve for the Ka value of HF. 
4 0
3 years ago
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