Zinc hydroxide is (almost) insoluble in water, while caesium acetate is soluble
Zn(CH₃COO)₂(aq) + 2 CsOH(aq) → Zn(OH)₂(s)↓ + 2 Cs(CH₃COO)
The net ionic equation is:
Zn2+(aq) + 2OH-(aq) --> Zn(OH)2(s)
Bauxite . Chemically it is Aluminium oxide (Al2O3)
Vanadium is a 3d element. we use it for make surgical instruments.
Only IRON Rusts. Alloys that contain iron may rust.
Other alloys do not RUST. They may oxidise.
Stainless Steel which is an alloy of iron,.nickel and chrome does not rust. , hence its name Stainless Steel.
Remember the Avogadro Number. This is the number of atoms in an element or the number of molecules in a compound. for an amount of 1 mole.
So 1 mole(Li) it is 6.022 x 10^(23) atoms .
In Numbers
602,200,000,000,000,000,000,000
Wrong!!!!
Ships float, and submarines also float.
However, submarines have special buoyancy tanks, which are filled with sea-water, which then makes then sink. The air in these tanks is removed by a vacuum, out into compressed air cylinders. , this allows water to enter and hence the submarine sinks. To make the submarine re-surface, the compressed air in the compression tanks is blown back into the buoyancy tanks, thereby pushing out the sea-water, hence the submarine re-surfaces(floats).
Remember the Archimedian Principle.
'The weight of a body immersed in a fluid is equal to the weight of the fluid displaced'.
As an experiment to yourself, obtain a spring balance, an house brick and a tanks of water.
Attach the brick to the spring balance, with a piece of string, and note the weight in air. Now keeping the brick attached to the spring balance lower it into the water of the water tank, and note the new less weight. The difference in the weight is the weight of the water displaced by the brick.
Hence Archimedes principle and the reason why ships and submarines can float, because the displace less water.
First of all to correcty your English . The sentence should start as 'Which'. 'Witch' is a female sorceress.
When asking a question it is 'Which'.
To answer you question.
Only iron RUSTS. No other metal rusts, but oxidises.
So iron rusts and bronze does neither rust nor oxidise.
It comes from the Persian ' Zargun' meaning 'gold like'.
Zinc is denser, because a pellet of it will sink in water.
Sodium is not as dense as water, because it floats on thre surface ], when reacting with water.
Li2S, which is classified by the AX2 bond type. This bond type is indicative of a linear structure with 180 degree bond angles. This bond is also considered an ionic bond, forcing Lithium to become 2+ and Sulfur to be 2-.
Calcium is a malleable, ductile, silver-white, relatively soft metal with face-centered, cubic crystalline structure.
Magnesium sulohate is a neutral salt. Because it contains the basic cation (Mg^2+) and the acidic anion (SO4^2-).
You have answered the question for yourself.
Calcium + Chlorine = Calcium chloride.
The BALANCED reaction equation is
Ca(s) + Cl2(g) = CaCl2(s)
Manganese(II) Fluoride = MnF2
Manganese(III) Fluoride = MnF3
Manganese(IV) Fluoride = MnF4
NO!!! Zinc is a metal. It will react readcily with mineral acids, such as hydrochloric acid.
NO!!!
Potassium hydroxide contains;-
1 X potassium(K)
1 x Oxygen (O)
1 x Hydrogen (H).
To give the formula 'KOH'.
NB Helium is 'He'. It is the most unreactive element of all. It remains in the monatomic gaseous state. So it is not part of potassium hydroxide.
An ion can be formed by either losing or ganing electron(s).
E.g.
Sodium metal can become the sodium ion by losing one electron .
Na)g) = Na^+(g) + e^-
Oxygen gas can become the oxide ion by gaining two electrons.
O2(g) + 4e^- = 2O^2-(g).
NB
Uncharged entities are ATOMS .
Charged Entities are IONS.
The word 'ion', is a collective noun for ; - CATIONS ( positively Charged ions), and ANIONS (negatively Charged ions).
The atomic number of calcium is 20 and its electronic configuration is 2,8,8,2. Calcium atom tends to lose the 2 valence electrons and becomes positively charged calcium ion. Positively charged ions get attracted towards the cathode i.e. the negative terminal in an electric cell. Hence, positively charged ions are known as cations. Calcium is a cation.
The element produced is HYDROGEN gas.
Remember the general acid reaction equations.
Acid + Metal = Salt + Hydrogen
Acid + Alkali = Salt +Water
Acid + Base = Salt +Water
Acid + Carbonate = Salt +Water + Carbon Dioxide
In this case use the first eq'n
Mg(s) + 2HCl(aq) = MgCl2(aq) + H2(g) .
The word equation is
magnesium + oxygen(air) = magnesium oxide.
The Balanced chemical eq'n is
2Mg(s) + O2(g) = 2MgO(s)
'Na' is Sodium. The use of 'Na'. comes from the Latin name for sodium , which is 'Nadium'
Similarly
'K' is Potassium. The use of 'K'. comes from the Latin name for potassium , which is 'Kalium'
NB There are a number of other elements in the Periodic Table, where the symbol does not indicate the modern name.
The scientific name of copper is 'Copper'. It has the chemical symbol 'Cu'.
'Cu'. is from Latin and means 'Cuprum. 'Cuprum is also the Latin name for 'Cyprus', which is where copper was first mined/found, by the ancients.