Elements and Compounds

There is no Atomic Number for butane.

However, there is a ' Relative Molecular Mass (Mr / MRR).

To calculate the Mr (Butane) , you need a copy of the Periodic Table showing the Atomic Masses.

Butane has the structural formula ' CH3CH2CH2CH3 ' Reduced to ' C4H10 '.

From the atomic masses on the periodic table. we have

Carbon(C) @ 12 . there being 4 carbons , so the total mass of the carbon moiety is 12 x 4 = 48

Similarly

Hydrogen(H) @ 1 . there being 10 hydrogens , so the total mass of the hydrogen moiety is 1 x 10 = 10

Hence the overall molecular mass (Mr) is 48 + 10 = 58 !!!!! The answer!!!!!

NO!!! Because there is no sulphur present.

Calcium chloride has the ions Ca^(2+) and 2 x Cl^(-)

A sulphite is the ion ' SO3^(2-) .

No, acetone and acetate are different compounds. Acetone is a colorless liquid solvent used in nail polish remover and industrial processes, while acetate refers to the acetate ion or compounds containing that ion.

NO!!!!

They have different chemical formula, and different chemical structure, and thereby function differently.

Ethyl Ethanoate (Acetate) CH3 - C(=O)-O-CH2-CH3 )

Diethyl Ether ; CH3-CH2-O-CH2-CH3

Ethyl Acetate, in the modern IUPAC nomenclature is ' Ethyl Ethanoate'.

The structural formula is

CH3-C(=O)-O-CH2-CH3

It is better to show the structural formula , because if reduced to 'C4H8O2' it could be an entirely different organic structure. e.g butanoic acid (CH3CH2CH2COOH) .

NB The 2nd carbon in the chain is singly bonded to the first carbon, doubly bonded to an oxygen and singly bonded to the second oxygen. hence the brackets. The singly bonded oxygen is then singly bonded to the third carbon.

Ethyl Alcohol is the archaic/everyday name for 'alcohol;, asfound in beers, wines and spirits.

Its modern IUPAC name is 'Ethanol'.

Its formula is usually shown in 'structural form' as ; CH3-CH2-O-H'

However, this can be reduced to ' C2H6O '. Since there are other organic substances with the formula ' C2H6O' it is better to show it in the structural form. e.g. CH3-O-CH3 ( diethyl ether).

Be it called ' alcohol/ethyl alcohol/ethanol it is still the same substance with the same structure.

The general alcohol functional group formula is shown as ' R-CH2OH'. 'R' being the rest of the molecule. , and the alcohol is ALWAYS shown as ' = CH2OH'. as standard IUPAC practice.

No such element as ' bormine '.

If you mean ' Bromine' , then it is an Halogen ( Group /(Family Name)).

Molybdenum (Mo)

Category (Family name) ; Transition metal ( in the 2nd row of Transition Group/Block

Atomic No. ; 42

Atomic Mass ; 95.94

Colour ; Silvery white

Phase ; Solid

M.P. ; 2623 oC

B.P. ; 4639 oC

Crystal Structure ; Body Centred Cubic.

Oxygen itself does not catch fire, but it is a key component that allows fires to burn. Fire needs three things to occur: fuel, heat, and oxygen. When these three elements come together in the right proportions, a fire can ignite and burn. Oxygen supports the combustion process by reacting with the fuel in a fire to produce heat and light.

Sodium oxide (Na2O) is a white crystalline structure. It looks a bit like common salt (sodium chloride).

It is NOT a metal.

To make 0.1 moles (M) of sodium hydroxide.

First measure out a mass of

= o.1 X 40(Mr) = 4.0 grams. of sodium hydroxide crystals.

In a measuring cylinder or beaker of greater volume than 1 litre.

add 500 mL of water. Then dissolve the 4.0 g of crystals in the water.

Then make up to 1 litre by adding more water.

NB DO NOT measure out 1 litre and then add 4.o g of (NaOH) crystals. , because you will have more then 1 litre, and the wrong concentration.

Sodium (Na), oxygen (O), and hydrogen (H). The formula is NaOH. Sodium (Na), oxygen (O), and hydrogen (H). The formula is NaOH.

Formul; Na2O

Name is ; sodium oxide.

NB

Two sodium ions are ionically combined with one oxygen ion.

Na^(+) + Na^(+) + O^(2-) = Na2O

'Na' is the chemical symbol for sodium. ' Na' is the Latin initials for ' Nadium' (sodium).

Sodium oxide is a white crystalline solid, which readily dissolves in water to form sodium hydroxide ( Caustic Soda / Lye).

Na2O + H2O = 2NaOH.

The existing elements found in our environment are: Light from the sun, carbon dioxide from the air, and water and chemicals from the soil combine miraculously to produce food.

The earth bears the unmistakable stamp of deleberate design. And there is no design without a designer.

Our environment provides many delightful things for our enjoyment. In thinking over, here are some things to consider: Was it undirected chance that placed the earth at just the right distance from the sun, its source of energy in the form of light and heat?.

Here is what the Bible has to say concerning the designer, in the last Book of the Bible, Revelation 4: 11.

" You are worthy Jehovah our God, to receive the glory and the honour and the power, because you created all things."

Carbon!!!!!

Chemistry is divided into three parts.

Organic ; The chemistry of carbon compounds

Inorganic ; The chemistry of non-carbon compounds

Physical ; The energy changes involved in chemical reactions.

An electrolyte is any substance that dissolves in water, and allows electrocity to pass.

Common electrolytes are sodium chloride, and sodium carbonate. They form the ions Na^(+) , Cl^(-) and CO3^(2-) on dissolution in water. These ions are free to move, hence electrical flow.

NB THere are many more electrolyyes.

No such molecule as 'calcium sulphate'. This name would suggest that the fomrula is ' CaHSO4. This does NOT exist because the internal charges do NOT balance.

Calcium sulphate is a chemical salt, that contains ;-

1 atom of calcium

1 atom of sulphur

4 atoms of oxygen

The formula is ' CaSO4 '.

Hydrogen sulphate is more commonly known as ' sulphuric acid'.

It contains ;-

2 atoms of hydrogen

1 atom of sulphur

4 atoms of oxygen /

The formula is ' H2SO4 '.

No such compound as ' baO'.

If you mean ' BaO' , the the name is ' Barium Oxide '.

NB All chemical symbols have as their first letter as a CAPITAL letter.

This is the IUPAC international standard.

An atom of 18 protons is an atom of Argon, which is a Noble/Inert Gas.

Consequently being an inert gas it does NOT gain extra electrons.

So an atom of Argon does NOT have 22 electrons. It only has 18 electrons, . in order to remain neutrally charged. It does NOT form an ANION .

The number of protons indicates the element(name).

The number of neutrons indicates the isotopic mass.

The overall charge on an atom of aluminium is 'ZERO' . The number of protons equals the number of electrons.

No such compound as 'sulphur oxide'.

If you mean 'sulphur dioxide.'.

Then the word equation is

sulphur + oxygen == combustion==> sulphur dioxide.

S(s) + O2(g) == combustion ==> SO2(g)

To make sulphur trioxide

Sulphur dioxide + oxygen == catalyst==> sulphur trioxide.

2SO2(g) + O2(g == vanadium catalyst==> 2SO3(g)

Elemental sulphur burned in oxygen (air) forms sulphur dioxide.

NO!!!!

On dissolution in water it forms Sulphurous acid (H2SO3)..

Compare with Sulphuric Acid (H2SO4), formed from the dissolution of SO3 in water.

Hydrogen peroxide is sometimes used in ear drops to soften earwax, but it may not be suitable for everyone. It is better to avoid putting hydrogen peroxide or other substances into the ear if you have a perforated eardrum, ear tubes, ear infection, significant pain, or ear discharge unless advised by a healthcare professional.

If earwax is impacted or causing hearing problems, professional removal may be a safer option. CND Hearing Solution in Auckland provides earwax removal services.

Website: cndhearingsolution.co.nz/

Correction !!!! It is THREE elements.

They are Calcium, Sulphur, and oxygen .