Chemistry

NO!!!!

There are two fluorines (F2), but only one fluorine in ' NaF '.

You have 'lost' a fluorine. Remember the Law of Conservation of Mass. In chemical eq'ns you cannot 'magic' something up out of nowhere, or just lose it. It has to be balanced. Mass has to preserved on both sides of the reaction eq'n.

So to balance the eq;n. we need two atom of sodium .

Hence

2Na(s) + F2(g) = 2NaF(s) =[ Na-F + Na-F ].

NB Sodium exists as separate atoms hence ' Na + Na = 2Na'.

However, fluorine is a diatomic molecule and exists as ' F-F- = 'F2'.

C2H6 + O2 = CO2 + H2O

There are two carbons in the reactant, so there are two carbon in 'CO2', by writing '2CO2' .

Hence

C2H6 + O2 = 2CO2 + H2O

Similarly, there are six hydrogen in the reactant, so there are six hundreds in H2O , by writing ' 3H2O .

Hence

C2H6 + O2 = 2CO2 + 3H2O

To balance the oxygens, we now think ' backwards'.

We note in the products there are 2 x 2 = 4 oxygen in CO2. and 3 x 1 = 3 in H2O. So we need 4 + 3 = 7 oxygens in the reactants. We already have '2' oxygen in the reactants as 'O2' . To make this up to '7' , we write ' 3 1/2' as the molar ratio/. ( 2 x 3 1/2 = 7)

Hence C2H6 + ( 3 1/2)O2 = 2CO2 + 3H2O

Chemists do NOT like fractions in the molar ratios. So to remove the '3 1/2' we multiply the whole reaction eq'n by '2'.

Hence

2C2H6 + 7O2 = 4CO2 + 6H2O is the balanced reaction eq'n.

NB Note the number of each type of atom are equal on both sides.

4 carbons

12 hydrogens

14 oxygens.

NNB When doing these combustion eq'ns for alkanes, alkenes, alkynes, etc., Think to forward balance the carbons and hydrogens, then 'Back' think of the number of oxygens.

No such compoound as 'NISO4 x 7 H2O '.

If you mean

' NiSO4, 7H2O ' , then it is 'Nickel sulphate hepta-hydrate'.

7H2O is 'Seven molar ratios of water '.

Instead of writing 'H2O + H2O +.... + H2O; seven times over, we insert a prefix '7'.

It is NEITHER an Acid NOR a base, but a '(Chemical) Salt'.

A Chemical Salt is any substance composed of a metal cation, and an acidic anion.

The pH is ~ 7.

Copper Sulphate is Cu^(2+) the metal cation and SO4^(2-) the acidic anion.

NB Table Salt, that you use at home, is also a chemical salt, because it is composed of Na^(+) the metal cation and Cl^(-) the acidic anion. . Again the pH ~ 7 when dissolved in water.

et seq.,

In a flask, the bung shoul have TWO(2) tubes. One is the 'Thistle Funnel' for pouring in the Acid and the other is the gas exit tube, to collect over water, or a gas syringe.

Into the flask place a known mass of the marble chips. Insert the bung with the two tubes. (Thistle Funnel and Exit tube). Place the exit/delivery tube over water in a gas jar. or connect to a gas syringe.

Through the thistle funnel pour in a known volume and molarity of hydrochloric acid. . The reaction will start immediately(fizzing), without the leakage/loss of product gas. Either measure the volume collected in the gas syringe, or the volume collected in the gas jar over water.

To test for carbon dioxide, pass the delivery tube through limewater, which will turn 'milky' white from colourless.

Also holding the gas jar openside up ; Carbon Dioxide is an heavy gas, place a lighted splint in, and it will be extinguished.

It increases the concentration of OH - in a solution.

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Protium, Deuterium, & Tritium.

To enlighten further.

#1; Protium ; 1 proton, 0 neutrons, 1 electron ; Atomic mass '1'.

#2; Deuterium ; 1 proton, 1 neutron, 1 electron ; Atomic mass '2'.

#3 ; Tritium ; 1 proton, 2 neutrons, 1 electron ; Atomic mass '3'.

NB. Protium is the most common isotope of hydrogen, and casually just referred to as 'hydrogen'.

Deuterium is much less common isotope of hydrogen , and casually referred to as 'heavy hydrogen'. Symbolically it is 'D'.

Tritium is the rarest isotope of hydrogen , sometimes referred to as 'super-heavy; hydrogen. It is also radio-active. Symbolically it is 'T'.

Notice it is ONLY the neutrons number that varies, and consequently the atomic mass.

Remember definitively 'An isotope has a different number of neutrons'.

Materials made up of two or more metals or a metal and a nonmetal is what is known as an alloy. An alloy could be a solid solution, mixtures of various metallic phases or intermetallic compounds. Examples of alloys are brass, steel and pewter.

IUPAC name for 'formaldehyde' is ' METHAN**A**L'.

NB In the IUPAC nomenclature ( naming system) , Alcohols have the suffix ' ---OL'.

Fomulaically it is written as 'R-CH2OH'.

Aldehydes have the suffix '---AL'. Fomulaically it is written as 'R-CHO'.

There is only one letter difference, so be careful when writing the name, because you may refer to the incorrect compound.

'R' refers to the rest of the molecule.

IUPAC name for 'CO' is 'Carbon monoxide'.

NB Do NOT confuse with 'Co' , this is the chemical symbol for 'Cobalt'.

The subtle difference is in CO it is a Capital 'O' , and in Co it is a lower case 'o'.

NNB ; IUPAC ; International Union of Pure and Applied Chemistry.

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The term "penis" does not correspond to any element or group in the periodic table. The periodic table is organized by elements, which are classified into groups based on their chemical properties. If you meant to refer to a specific element or compound related to biological functions, please clarify, and I'd be happy to help!

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The first H in the periodic table stands for hydrogen. Hydrogen is a chemical element with symbol H and atomic number 1. It is the lightest and most abundant element in the universe.

There is no element represented by the single letter 'M'.

NB ( Nota Bene)

Mn is manganese

Mg is magnesium

Do NOT confuse the two. They are completely different elements, with different atomic structures.

'Mn' on the Periodic Table is 'Manganese'.

Do NOT confuse with 'Mg' ,which is also on the Periodic Table as 'Magnesium'.

'Mn' & 'Mg' are two different elements, with different atomic structures.

It is NOT 'fe' , but 'Fe'.

'Fe' is from the Latin word for Iron, which is 'Ferrum'.

NB Two letter elemental symbols are ALWAYS written as ; first letter is a CAPITAL letter and the second letter is small/lower case. This is the international standard and as shown in the Periodic Table.

Hence iron is 'Fe' NOT 'fe'.

The columns down are named 'GROUPS.

The lines accross are name ' PERIODS.

NB Have a look on the 'web' (WWW') for Chemical Galaxy spectacular display of the Periodic Table in a completely different form .

Each spoke is a Group and each circle/loop is a period.