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geniusboy [140]
3 years ago
9

What does multivalent mean???

Chemistry
1 answer:
salantis [7]3 years ago
4 0
In the context of multivalent ions, it is when it has multiple oxidative states. 
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The halogens, the elements of Family 17 on the periodic table, combine easily with elements from Family 1. When a halogen reacts
timofeeve [1]

Answer:

When halogen elements react with group one metals they form halide salts.

Explanation:

The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature. Their chemical properties are resemble greatly with each other. As we move down the group in periodic table size of halogens increases that's way fluorine is smaller in size as compared to other halogens elements. Their boiling points also increases down the group which changes their physical states. i.e fluorine is gas while iodine is solid.

When halogen elements react with group one metals they form halide salts.

Alkali metals have one valance electron and halogens needed one electron to complete the octet thus alkali metals loses one electron which is accepted by halogens atom and form ionic compound called halide salts.

For example:

2Na + Cl₂ → 2NaCl

2K + Cl₂  → 2KCl

2Rb + Cl₂ → 2RbCl

2Li + Cl₂ → 2LiCl

With bromine:

2Na + Br₂ → 2NaBr

2K + Br₂  → 2KBr

2Rb + Br₂ → 2RbBr

2Li + Br₂ → 2LiBr

With iodine:

2Na + I₂ → 2NaI

2K +  I₂ → 2KBI

2Rb + I₂ → 2RbI

2Li + I₂ → 2LiI

4 0
3 years ago
An Arrhenius base is a substance that increases the concentration of which ion in water solution?
IrinaVladis [17]
An Arrhenius base is a substance that increases the concentration of OH- ions in a water solution.

A base has a high pH, whereas an acid has a low pH and increases the concentration of H+ ions in a solution.

Hope this helps!
7 0
3 years ago
Read 2 more answers
What is the percent by mass of oxygen in Ca(OH)2 ?
Leya [2.2K]

Answer:

The answer to your question is Percent by mass = 43.2

Explanation:

Data

Ca(OH)₂

Percent by mass of Oxygen = ?

Process

1.- Calculate the molecular mass of Ca(OH)₂

    Ca(OH)₂ = (40 x 1) + (16 x 2) + (2 x 1)

                   = 40 + 32 + 2

                   = 74 g

2.- Calculate the mass of Oxygen = (16 x 2)

                                                        = 32 g

3.- Calculate the percent by mass

      Percent by mass = (mass of oxygen/mass of Ca(OH)₂) x 100

      Percent by mass = (32/74) x 100

      Percent by mass = 43.2

7 0
3 years ago
Why do you think the warmer water at the bottom of the top rises to the top?
pogonyaev
When you heat up water, the water molecules start moving around faster and faster. ... So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top, mixing with the cold water along the way and creating purple water.
6 0
3 years ago
Read 2 more answers
Using the balanced equation shown below, calculate the mass of c3h8 that must react in order to release 2.45×106 × 106 kj of hea
Mumz [18]

The balanced chemical equation for this is:

C3H8  +  5 O2  -->  3 CO2  +  4 H2O

 

So we can see that for every 1 mole of C3H8, 2219.9 kJ of energy is released. Hence the total number of moles of C3H8 required is:

 

moles C3H8 = 2.45×10^6 kJ / (2219.9 kJ / mol)

moles C3H8 = 1103.65 mol

 

The molar mass of C3H8 is 44.1 g/mol, therefore the mass is:

 

mass C3H8 = 1103.65 mol * 44.1 g/mol

mass C3H8 = 48,671.11 grams = 48.67 kg

4 0
3 years ago
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