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saw5 [17]
3 years ago
6

Solid potassium fluoride decomposes into fluorine gas and solid potassium .

Chemistry
1 answer:
inna [77]3 years ago
8 0
2KF(s) -----> 2K(s)+F2(g)
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Which of the following elements has the smallest atomic radius
babunello [35]

Answer:

Element with the smallest radius is Carbon.

Explanation:

In a periodic table, atomic radius increases down the group due to addition of a new shell and decreases across the period from left to right due to increasing nuclear charge.

Due to addition of more electrons in same shell and increase of positive charge in nucleus increases attractive forces between electrons and nucleus hence decreasing size.

Carbon and Lithium are present in same period and hence Carbon has smaller size; Potassium and Bromine are present in same period and hence out of the two, Bromine has smaller size.

On comparing Carbon and Bromine, atomic radius increases down the group hence, Carbon has the smallest radius among the four given elements.

3 0
3 years ago
How many mL of 1.01 M LiNO3 solution has 6.63 g of solute?
Anna35 [415]

Answer:

The answer to your question is 97 ml

Explanation:

Data

volume = ? ml

concentration = 1.01 M LiNO₃

mass = 6.63 g

Process

1.- Calculate the molecular weight of LiNO₃

LiNO₃ = (1 x 6.94) + (1 x 14) + (16 x 3)

          = 6.94 + 14 + 48

          = 69 g

2.- Calculate the moles of LiNO₃

                  69 g ------------------ 1 mol

                  6.63 g ---------------  x

                    x = (6.63 x 1) / 69

                    x = 0.096 moles

3.- Calculate the volume

Molarity = moles / volume

-Solve for volume

Volume = Molarity x moles

-Substitution

Volume = 1.01 x 0.096

-Result

Volume = 0.097 l or 97 ml

8 0
2 years ago
The orange color of carrots and orange peel is due mostly to β-carotene, an organic compound insoluble in water but soluble in b
gogolik [260]

Answer:

First Method: Vacuum Distillation and Chromatographic separation of the remains that were precipitated out from the peel.

Second Method: Extraction of components from orange peels by help of precipitation procedures that are mostly done <em>In Situ. </em>Those components can be recovered using the saponification process. Then these are examined under UV light spectroscopy. Now, the existence and extent of carotenoids can be determined by checking the levels of anti-oxidants.

6 0
3 years ago
Beaches along the eastern and western coasts of North America are composed chiefly of quartz grains.
lidiya [134]
I think the answer is true. These beaches are composed mostly with sandstone which is mainly sand-sized minerals. These grains is made up of quartz and feldspar since these are the most common mineral found in Earth.
3 0
3 years ago
Is Oxygen - O2 a pure substance or a mixture?
svetlana [45]
Oxygen is a pure substance, as it is composed of only a single kind of atom. Which is the oxygen atom, it cannot be broken or degraded down any further into constituents that make up the element. In terms of both chemically and physically.
5 0
3 years ago
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