Explore topic-wise InterviewSolutions in .

Relies on whether you need to portray them in a Lowry-Bronsted demonstrate or a Lewis corrosive base model. The previous says that all acids give a proton and all bases have an electron match accessible protonation. This covers a ton of acids and bases yet many are likewise missed. For instance, BR3 is an acid however it has no protons to give. Boron has an unfilled valence, however, and can acknowledge an electron match. It is this property, having the capacity to acknowledge an electron match (donated by a base) that characterizes a Lewis corrosive.

In this way, as a rule, a corrosive can acknowledge an electron match, a base can give an electron pair, and this characterizes what all acids have in common, and what all bases have in common.

Weight of NaOH = N* E.w. * V/1000

Put the values in the above formula

Weight of NaOH required.= 0.1 *40 *100/1000

= 0.4gm

so what if gypsum is formed?

We write the formulae for the reaction :

Na₂CO₃(aq) + 2HCl (aq) - - - - > 2NaCl(aq) + CO₂(g) + H₂O (l)

Mole ratio is :

1 : 2 meaning 1 mole of Sodium carbonate reacts with 2 moles of Hydrochloric acid.

Given the mass of HCl we can get the reacting moles.

Moles = mass of solute / molar mass

Molar mass of HCl is : 35.5g (Cl) + 1g (H) =36.5g/mol

Moles = 3.65/36.5 =0.1moles.

The number of reacting moles of Sodium Carbonate is 0.1/2 = 0.05moles from the mole ratio.

The molar mass of Sodium Carbonate is :

23 × 2(Sodium) + 16 × 3(Oxygen) + 12 (Carbon) =106g /mol

Reacting mass of Sodium Carbonate = 106 × 0.05 = 5. 3 g

Given the density as 10 %=0.1g/cm³

Volume = mass / density

5. 3 / 0.1 =53cm³

Answer:2)32

Explanation:4g of copper gave 5 gram of copper oxide.

Therefore,

Mass of oxygen in oxide = 5- 4 = 1g

Now,

Mass of copper which combined with 1 g oxygen = 4

Mass of copper which will combine with 8 gram oxygen = 4 x 8 = 32

Therefore, equivalent mass of copper is 32

Molecular formula of glucose = C6H12O6

therefore,

molecular mass of glucose = [ 6(12.001) + 12(1.008) + 6(16.00) ] amu

[72.066 + 12.096 + 96 ] amu

180.162 amu

∆S will pe positive.

Because, entropy increased due to release of CO2.

Please make it clear .... Please explain in details .

mol. wt of X4O6 = 4* atomic mass of X + 6 * atomic mass of O = 4x + 6*16 = 4x+96..where x is atomic mass of element X.so 4x+96 gms of X4O6 contains 4x gms of X.given, 10 g X4O6 contains 5.72 gms of X.so we can write, 4x+96 / 10 = 4x/5.72.solve the equtaion for x .by solving u can getx= 32.074 (answer )

MgCO3(s)→MgO(s) + CO2(g)

CaCO3(s)→CaO(s) + CO2(g)

The total initial weight of solid phase = (84x+100y) gm

x=the no. of moles of MgCO3 present

y=the no. of moles of CaCO3 present.

[MgCO3] = [MgO]

[CaCO3] = [CaO]

Final weight of solid phase = (40x + 56y) gm.

Final weight = 50% of the initial weight.

So, (84x + 100y)/2 = 40x + 56y

Or, 42x + 50y = 40x + 56y

Or, 2x = 6y

Or, x/y = 6/2 = 3

So, x:y = 3:1.

i.e 3 moles of MgCO3 =3×84=252 g

And 1 mole of CaCO3=100 g

In (252+100=352g) mixture.

So

% MgCO3=252×100/352=71.59% Ans

% CaCO3=100×100/352=28.41% Ans

Correct option is A

C) the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

a)46g of Na atomatomic mass of Na=23uNumber of particles=Number of Moles x N⇒(given weight/ Gram atomic weight) x 6.023 x 10²³=(46/23)x 6.023 x 10²³=2x 6.023 x 10²³⇒12.046 x 10 ²³Na particles∴46 g of Na contains 12.044 x 10 ²³

wrong

1ml of H₂ reacts with 0.5ml of O₂ to form 1ml of water.30 ml of H₂ will react with 15 ml of O₂ to form water. So at the end of the reaction, 30 ml of water and 5 ml of O₂ will be left.

how?? can you please explain in brief

TheGattermann reaction, (also known as theGattermannformylation and theGattermannsalicylaldehyde synthesis) is a chemicalreactionin which aromatic compounds are formylated by hydrogen cyanide in the presence of a Friedel–Crafts catalyst (e.g. AlCl3).

NaOH , is the most basic so, it will have maximum pH.

No. of moles of 0.6M HCl = 0.15

No. of moles of 0.2M HCl = 0.15

letVbe the volume(in ml) of the 0.25M solution. No of moles present = 0.15+0.15 = 0.3

0.25M=(0.3×1000)/ VV=1.2L=1200 ml

now total volume is 1200 ml and intial volume was 1000 ml

Hence volume of water added is 200 ml

This type of reactions are called as neutralization reactions. i.e., and acid and base reacts to give salt and water.

IUPAC name-Chlorane[3]

Other names-Muriatic acid[1]

Spirits of salt[2]

Hydronium chloride

Chlorhydric Acid

hcl is a hydrochloric acid

HCL = HYDRO CHLORIC ACID

36.6 is the correct answer of the given question

36.6 is the correct answer

36.6 is the correct for HCL (hydro chloric acid)

a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.

It would be worth specifying that hydrogen fluoride boils at about 20∘C, so if by room temperature you mean 25∘C, then hydrogen fluoride will actually be a gas.

Impotant thing is that they havedifferent number of lone pairspresent on the more electronegative atom.

In water's case, you have two partial positive hydrogen atoms andtwo lone pairsof electrons on the oxygen atom, which means that each water molecule can form hydrogen bonds withfourother water molecules.

Hydrogen fluoride hasthree lone pairsof electrons, but only one hydrogen atom. This means that on average you will have insufficient partial positive hydrogen atoms to allow for the majority of hydrogen fluoride molecules to hydrogen bond at a particular moment.

Both HCl and HF are gases at room temperature. But HF has high boiling point than HCl because of the reason that in HF the strength of hydrogen bond is stronger than the strength of hydrogen bond in HCl.

Smaller the size, more is the electronegativity and more is the covalent character. Therefore, option B is correct.

maxit covalent character will be in between those which have the least difference in their electronegativity

and we know that Fluorine is the most electronegative atom, so LiF will have most ionic character

hence LiI should be the correct answer.

option 3 is the correct answer

a) Cation- Metalsb) Anion- Non-metalsc) Electrostatic force - ionic bondd) van der Waals forces - covalent bond

Please hit the like button if this helped you.

a. It is conducting in molten(fused) state

one atom of CO26.02 x 10^23 atoms of C

can you explain plz

3) 1 mole CO2 = 6.02×10^23 ×3 atoms of CO2. 1)1 mole CO2 = 6.02×10^23 ×1 atoms of C.

can you explain it more

it will be more than 150 because ribose contains Avogadro number of carbon atoms but given are more than Avogadro so 3 will be a better option.

1 mole of carbon = gram molecular mass of carbon = 12 grams.

12g carbon = 1 mole

1g carbon = 1/12 mole

1g of carbon contains x atoms and 1g = 1/12 mole.

Therefore 1/12 mole of carbon has x atoms.

Equal number of moles of all the elements contain equal atoms, so 1/12 mole of magnesium also contains x atoms.

1 mole of magnesium = 24g

Therefore, 24 gram = 1 mole

1g = 1/24mole.

1/24 mole of magnesium = ( x * 12)/ 24 ( x multiplied by 12, divide by 24)

= x/2 atoms

this is the example of double displacement reaction.

option (b) is a combination reaction as both the reactants combine to produce a single product.

NiO < MgO < SrO < K2O

Explanation:Reason – This is the order because the basic character of oxides increases down the group, alkali metal oxides are more basic than alkaline earth metal oxides and oxides of the d- block element is less basic than those of s-block elements.

Magnesium and oxygen combine to from the magnesium oxide .It's a addition reaction that's we are seeing the addition of magnesium and oxygen here. It's a white solidified mineral which is found in nature in the form of periclase.The molecular formula of Mg0 is 44.3044 g/mol.Moreover, magnesium oxide is a mineral and used to maintain the level of magnesium in the body because magnesium is necessary for healthy bones as well as the muscles.

Magnesium combine with oxygen

The unbalanced equation is:

Mg(s)+O2(g)→MgO(s)

MultiplyMgOby2to balance the oxygens.

Mg(s)+O2(g)→2MgO(s)

MultiplyMgon the left side by2to balance the magnesiums.

2Mg(s)+O2(g)→2MgO(s)

Now, there are equal amounts of magnesium atoms and oxygen atoms on both sides, and so the equation is balanced.

o sa 2 ko kyu remove karta h

The aqueous solution of an acid conduct electricity because the acid solution have ions and the movement of these ions in solution helps for flow of electricity current through the solution.And the ions are H+ ions

Valence electrons remain unchanged on descending down a group in Periodic table.In a group all elements have same valency. The group number is, in fact, valency with respect to oxygen.

(a) is correct option

Because all acid aqueous solutions are conductive, due to the presence of hydrogen ions and acid ions, which can conduct charge exchange between the electrodes and thus conduct electricity. So the acid is also an electrolyte.

Aqueous solution of an acid conduct electricity because of the presence of hydrogen ions (H+) in it.