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3 years ago

Which two chemicals are products in the following chemical reaction?

Chemistry

1 answer:

BaLLatris [955]3 years ago

8 0

Answer:

A.PbCl2

C.Cl2

Explanation:

$\bold{PbO_2+4HCl\rightarrow PbCl_2+Cl_2+2H_2O}$

$PbCl_2\:\&\: Cl_2$ are the products in the given chemical reaction.

Hope it helps you in your learning process

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H2O and C6H12O6 are examples of ______

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Compounds. They both have more than one element in them

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What is used to measure the distance of nearby stars??

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Light years? if you are talking about the distance to the star.

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How many grams of calcium carbonate, CaCO3, contain 48 grams of oxygen atoms?

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Answer:

(40 g O) / (15.99943 g O/mol) x (1 mol CaCO3 / 3 mol O) x (100.0875 g CaCO3/mol) =

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So answer D), although three significant digits are not justified.

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7 0

3 years ago

Arrange the elements in decreasing order of first ionization energy.

just olya [345]

Answer:

The decreasing order of first ionization energy: Se > Ge > In > Cs

The decreasing order of first ionization energy: x > y > z

Explanation:

Ionization energy refers to the energy needed to completely pull out an electron from the valence shell of a neutral gaseous atom.

First ionization energy is the energy involved in the removal of first valence electron.

In the periodic table, down the group, as atomic radius of elements increases, the ionization energy decreases

Whereas, across a period, as atomic radius of elements decreases, the ionization energy increases.

PART (A):

Position of the given elements in the periodic table:

Indium (In): Group 13, period 5

Germanium (Ge): Group 14, period 4

Selenium (Se): Group 16, period 4

Caesium (Cs): Group 1, period 6

Thus, the increasing order of atomic radius: Se < Ge < In < Cs

Therefore, the decreasing order of first ionization energy: Se > Ge > In > Cs

PART (B):

Given elements:

element x: radius = 110 pm

element y: radius = 199 pm

element z: radius = 257 pm

Thus, the increasing order of atomic radius: x < y < z

Therefore, the decreasing order of first ionization energy: x > y > z

5 0

3 years ago