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postnew [5]
3 years ago
5

The precision of a measuring instrument is based on the fineness of its scale subdivisions.

Chemistry
2 answers:
Liono4ka [1.6K]3 years ago
3 0
The answer is True . The precision of a measuring is based on the fitness of its scale subdivisions
nevsk [136]3 years ago
3 0
Answer is true.......
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Describe how you would prepare your assigned ester from a carboxylic acid and an alcohol. You do not need to include a detailed
vesna_86 [32]

Answer:

The general preparation of esters( for example ethyl ethanoate) is through a process known as ESTERIFICATION.

Explanation:

The formation of an ester by the reaction between an alkanol and an acid is known as esterification. This reaction is extremely slow and reversible at room temperature, and is catalyzed by a high concentration of hydrogen ions.

In the preparation of one of the simpler esters known as ETHYL ETHANOATE the reactants include ethanol(an alcohol) and glacial ethanoic acid(a carboxylic acid) in the presence of concentrated tetraoxosulphate VI acid as a CATALYST. Note that, a catalyst is any substance that is able to increase the rate of a chemical reaction.

The mixture is warmed in a water bath( hot but not boiling) for about 25 minutes. The mixture is poured into a beaker partially filled with a sodium or calcium chloride to remove interacted ethanol. The ethyl ETHANOATE floats on the mixture as oily globules.

8 0
2 years ago
mass of 6.584 g. After it is heated, it has a mass of 4.194 g. What is the percentage by mass of water in the hydrate?
Bad White [126]
M₁=6.584 g
m₂=4,194 g

m(H₂O)=m₁-m₂

w(H₂O)=m(H₂O)/m₁

w(H₂O)=(m₁-m₂)/m₁

w(H₂O)=(6.584-4.194)/6.584=0.3630  (36.30%)

the percentage by mass of water in the hydrate 36.30

8 0
3 years ago
The mass of 100cm3 of water is 100 g. Use the formula to calculate its density.
yanalaym [24]

Answer:

It should be 1 g/cm3. Hope this helpd!

4 0
3 years ago
Read 2 more answers
Differentiate between a precipitate and an aqueous solution
antiseptic1488 [7]

Answer:

A precipate is a solid while an aqueous solution is liquid.

Explanation:

A precipitate is a solid which separates after a chemical reaction occurs. It is the solid product of the reaction.

An aqueous solution is formed when a substance is dissolved in water.

6 0
3 years ago
3. What is the substance ozone?
Reptile [31]
Chlorofluorocarbons and other halogenated ozone depleting substances are mainly responsible for man made chemical ozone depletion.
8 0
2 years ago
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