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3 years ago

Calcium+Hydrochloric acid=

Chemistry

2 answers:

mezya [45]3 years ago

6 0

Answer:

You get Ca(II)H^2

Explanation:

This is a reaction type equation calcium reacts with HA and forms a bond.

Anastaziya [24]3 years ago

4 0

Answer:

Ca + 2HCl = CaCl2 + H2

Explanation:

Coz,

This reaction is a single displacement reaction....so, Calcium (Ca) metal is reacting with Hydrochloric acid (HCl). the Ca replaces the H in HCl and we end up with CaCl2 and H2.

Calcium + Hydrochloric acid → Calcium chloride + Hydrogen gas

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A moist red litmus paper is used for testing ammonia gas ,why

yawa3891 [41]

Answer:

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3 years ago

Most gases exist as molecules, for example, fluorine is F2.

Kryger [21]

They are all stable and have eight valence electrons

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3 years ago

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Most of the costs associated with using renewable resources are due to

saveliy_v [14]

Answer:

a. overuse of resources is the correct answer.

Explanation:

Renewable resources are available and they are abundant but overuse of these renewable resources will have a negative effect on the surroundings and humans.

Overuse of renewable resources will leads to the depletion of these renewable sources in the future and will also make the ecosystem unbalance.

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Thus renewable resources are threatened due to overuse and it must be carefully used.

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3 years ago

Choose the element that is more reactive: oxygen or argon.

Mazyrski [523]

I choose oxygen because

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3 years ago

Give the number of lone pairs around the central atom and the molecular geometry of XeF4.A)0 lone pairs, tetrahedralB)1 lone pai

vovangra [49]

Answer: 2 lone pairs, square planar

Explanation:

Using the VSEPR ( Valence Shell Electron Pair Repulsion)Theory

To calculate the number of lone pairs electron can be done using the formula;

Number of electrons = ½ (V+N-C+A)

V mean valency of the central atom

N means number of monovalent bonding atoms

C means charge on cation

A means charges on anion

Therefore, to calculate the number of lone pair electron C=A=0;

Number of electrons = ½ (8+4) = 12/2 = 6

Number of bonding pair = 4

Number of lone pairs of electron = 6-4 = 2

The hybridrization of the compound is sp3d2 because the number of electrons around the central atom is 6.

The geometry of the compound is square planar and this is because of the repulsion between the bonding pair of electrons and lone pair of electrons which causes the lone pair of electrons to lie in a perpendicular plane in order to acquire stability.

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3 years ago