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son4ous [18]
3 years ago
13

When a mineral was heated in a Bunsen flame to constant mass, a colourless gas that turned lime water milky was evolved. The rem

aining solid was cooled and then added to aqueous hydrochloric acid. Vigorous effervescence was seen.
What was the mineral?


A aragonite, CaCO3

B artinite, MgCO3.Mg(OH)2.3H2O

C barytocalcite, BaCO3.CaCO3

D dolomite, CaCO3.MgCO3

Please Explain.
Chemistry
1 answer:
max2010maxim [7]3 years ago
6 0
Vigorous effervescence can be seen only in C
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Explain the principle upon which separation is achieved in a distillation column.
aalyn [17]

Answer:

The fundamental principle involves the formation of equilibrium and separation into distillate and bottoms governed by the equilibrium composition curve , number of stages and the purity with which the distillate is required.

Explanation:

Distillation is a type of the separation process by physical means of a mixture on basis of its difference in boiling point or vapor pressure .  

Where we can just heat the mixture and separate out the components i.e the component with lower boiling point will form vapor easily and can be later condensed whereas the component with higher boiling point will remain as residue.

In case of a distillation column the same principle is applied at different stages to separate multiple components .The stages are known as trays or plates . In general , there is a certain liquid on each of the plate, and the arrangements are made for the ascending vapors to pass through the liquid and make contact with it . The fundamental principle involves the formation of equilibrium and separation into distillate and bottoms governed by the equilibrium composition curve , number of stages and the purity with which the distillate is required.

7 0
3 years ago
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What determines an atom's reactivity?
vovikov84 [41]

Answer:

D) How many valence electrons the atom contains.

This is the only closest one

because the number of electrons in the outermost shell is the correct answer

4 0
3 years ago
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Given the value of the equilibrium constant (Kc) for the equation (a), calculate the equilibrium constant for equation (b)
matrenka [14]

Answer: The value of equilibrium constant for new reaction is 1.92\times 10^{-25}

Explanation:

The given chemical equation follows:

O_2(g)\rightarrow \frac{2}{3}O_3(g)+\frac{1}{2}O_2(g)  

The equilibrium constant for the above equation is 5.77\times 10^{-9}

We need to calculate the equilibrium constant for the equation of 3 times of the above chemical equation, which is:

3O_2(g)\rightarrow 2O_3(g)

The equilibrium constant for this reaction will be the cube of the initial reaction.

If the equation is multiplied by a factor of '3', the equilibrium constant of the new reaction will be the cube of the equilibrium constant of initial reaction.

The value of equilibrium constant for reverse reaction is:

K_{eq}'=(5.77\times 10^{-9})^3=1.92\times 10^{-25}

Hence, the value of equilibrium constant for new reaction is 1.92\times 10^{-25}

5 0
3 years ago
Will strontium bromide and potassium sulfate give a precipitate
antiseptic1488 [7]

Answer:- Yes, strontum bromide and potassium sulfate gives a precipitate of strontium sulfate.

Explanations:- As per the solubility rules, all compounds of alkali metals are soluble.

Sulfate of most of the alkaline earth metals like Ca, Ba and Sr are insoluble.

A double displacement reaction takes place when strontium bromide and potassium sulfate are mixed and a precipitate of strontium sulfate is formed:

Sr(Br)_2(aq)+K_2SO_4(aq)\rightarrow 2KBr(aq)+SrSO_4(s)

Note: (aq) stands for aqueous and (s) stands for solid and here it's precipitate.

8 0
3 years ago
How is all matter alike?
nignag [31]

All matter (solid, liquid or gas) has a definite shape and occupies a specific volume.

<h2>Hope it helps...</h2>
4 0
3 years ago
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