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It is because zinc lie above hydrogen in reactivity SERIES while copper lie below hydrogen in reactivity series. THEREFORE zinc DISPLACES hydrogen from sulphuric acid and produces zinc sulphate while copper being lying below hydrogen can't DISPLACE it from sulphuric acid and thus don't react with it.
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Borazine is an inorganic compound with the CHEMICAL formula (BH)3(NH)3. ... The compound is ISOELECTRONIC and isostructural with benzene. Like benzene, borazine is a colourless liquid. For this reason borazine is sometimes REFERRED to as "inorganic benzene

First, the charge of complex ANION is 2-. NH3 is a neutral ligand, whereas CN is 1-, O is 2- and the PEROXIDO ligand (O2) has an OXIDATION number of -2: so 2x(-1)+2x(-2)+1x(-2)=-8. Therefore, the formal oxidation number for chromium ion MUST be +6, a d0 METAL center. 1K Views · View Upvoters.

NaCl will not MAKE NA+ and CL- , if just add it in WATER ....U have to make a flow of CURRENT and do electrolysis. ....

Important Topics:
 
1. Classification of matter
2. SI unit of various PHYSICAL quantities
3. Scientific notations and mathematical operations
4. Significant FIGURES (precision and accuracy)
5. Dimensional analysis
6. Laws of chemical combination and Dalton’s theory
7. Atomic and molecular masses
8. Mole concept and molar masses
9. Empirical formula
10. Percentage composition
11. Limiting reagents
12. DIFFERENT formulae to express volume of solution
a) MASS percentage
b) Mole fraction
c) Molarity
d) MOLALITY

Blue vitriol, as we know it, is hydrated Copper(II) Sulphate, meaning CuSO4.5H2O. ... When blue vitriol is HEATED, those WATER of CRYSTALLIZATION escape out of the crystal and what's LEFT is anhydrous copper sulphate or simply CuSO4, without any water of crystallization.

The ENERGY of second excited state is
since its in GROUND state, n=1
the first excited state, n=2
then second excited state,n=3

since,
energy=
[tex] - 13.6 \DIV {n}^{2} \\ - 13.6 \div 9 = - 1.51ev

no. of MOLES of N =10/14=0.714

no. of moles of O =8/16=0.5

mole % of OXYGEN = 0.5/(0.714+0.5)×100

= 0.4117×100

= 41.17%

Yes, it's a very important topic not only in +1&+3 but also it will help you to fight entrance EXAMS like Neet and JEE MEANS etc.

2,8,3 is AL (aluminium)

2,8,7 is Cl (CHLORINE)

FORMULA of COMPOUND s ALCL3

As nitrogen ATOM is SMALLER, there is greater repulsion of electron density of two nitrogen atoms, which in turnweaken the N-N single bond and DECREASES the tendency of nitrogen toshow catenation. ... Thus higher the stability of single bond between the same atom more will be its affinity to UNDERGO catenation.

Answer:

Although to BECOME a PRACTISING scientist, you will have to do a postgraduate course LIKE MSc or MS which is a TWO year course after 3 years of BSc. You will be able to do an independent RESEARCH project (1 year) during MSc which will give you your first exposure to research.

Explanation:

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Cycloalkanes: Definition & Examples



Structural Isomers: Definition & Examples

Lesson Transcript

Instructor: Nissa Garcia

Nissa has a masters degree in chemistry and has taught high SCHOOL science and COLLEGE level chemistry.

Chemical compounds are MADE of atoms bonded together. The way the atoms are bonded together in a compound is shown by its structural formula. In this lesson, we will learn about the different types of structural formulas and look at an example for each formula.

What Is a Structural Formula?

We have chemical compounds all around US - they are in our FOOD, drinks and in objects we use every single day. These chemical compounds can be identified by their molecular formulas. A few examples are shown in the following illustration:

Examples of common compounds and their molecular formulas

While the molecular formula shows what how many atoms there are for each element present in the compound, it does not tell us about how the elements are bonded together. We don't know which atom of an element is bonded to which. This is where the structural formula comes in.

The structural formula shows how the atoms are arranged and bonded together in a molecular formula of a chemical compound. Let's take a look at the compounds vinegar and ethyl alcohol, and compare their molecular formulas with their structural formulas:

MOLECULAR WEIGHT of the COMPOUND will be APPROXIMATELY 100 (99.9)

Because of the great WEALTH of discoveries made there, four elements are named after the Swedish mining VILLAGE, Ytterby (ytterbium, yttrium, erbium and terbium). ... MODESTLY, no DISCOVERER has ever named an elementafter him or herself, but several scientists have been honoured by having elements named after them.

(d) DOBSON UNIT......

It is your ANSWER of QUESTION

Because silver is very LUSTROUS and LIGHT
it is used to DECORATE SWEETS it make more BEAUTIFUL places

1 liter water =1 KG

or 1000 ml water =1 kg [GIVEN d=1000kg/m3]

MOLES of water PRESENT in 1000ml=1000/18=55.55

Hence molarity of water =55.55M

Polar substances have a POSITIVE and a negative charge on the ATOM.

Non-Polar substances do not have large charges on the atom ATTACHED.

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The TOTAL NUMBER of ELECTRON is 6.023×10^22

R=r X L\a
Where R= resistance
r= RESISTIVITY
l= length of CONDUCTOR
a= AREA of cross section

Melting point INCREASES from NITROGEN To As because -

-As we MOVE down the group the number of SHELLS increases and the Van der waals interactions increase.

-But elements after Nitrogen have d orbital in them which LEADS to screening effects.

Thus the force of attraction between the inner shells decreases which leads to a low melting point.

Aniline or Phenylamine is a amine GROUP attached to a phenyl group, or C6H5NH2. The ring structure possesses resonance. Electrons are delocalised from individual atoms and their position varies around the structure. The SOURCE of the basicity of the amine group is the lone pair on the nitrogen atom. This lone pair can form a dative covalent bond with a H+ ion. But in Aniline, the lone pair on the nitrogen is also delocalised. It loses the lone pair to resonance, and so cannot donate an electron to a proton, and THEREFORE loses a lot of its basicity. Methylamine, CH3NH2, on the other hand does not possess resonance, and the lone pair on the nitrogen is in place, so it can ACCEPT protons, making it basic.

Molarity = GIVEN mass ÷ MOLECULAR mass × volume in liter

Volume = 500 ÷ 1000 = 0.5 liter

Molarity = 5 ÷ 40 × 0.5
Molarity = 0.0625

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Hey
Here's your ANSWER

I THINK the ANSWER is 3........I am not SURE about it......

Atomic NUMBER of oxygen =8
acc to AUFBAU rule
1s² 2s² 2p4
thus oxygen requires more 2 electron to complete it's octet and get STABLE
nascent oxygen is highly reactive
because of its highly reactivness and it's tendency to get stable
it reacts with another oxygen MOLECULE and forms DIATONIC structure

Reaction of phenol with chloroform and KOH to give salicylaldehyde is known as Reimer-Tiemann reaction.



Mechanism:—-

In this reaction,chloroform reacts FIRST with KOH to form anion which subsequently LOSES CHLORIDE ION to form electron DEFICIENT dichlorocarbene.

Carbene in next step attacks on phenol at ortho position to form an intermediate,which on hydrolysis form salicylaldehyde.

N2 + 3H2 -> 2NH3 is the balanced equation

1 vol REQUIRES 3 vol of H2 ... As per the question 10 ml requires 30 ml H2

So considering 20 ml H2 then only 10*2/3 = 6.67 ml can react and they combine to form

2*6.67 = 13.34ml NH3 with 3.33ml N2 left over

option is A and C (if approximated)

When CHARCOAL BURNING the CARBON reacts with OXYGEN so it is a TYPE of a chemical reaction

The SUBSTANCE that is totally CONSUMED first in CHEMICAL REACTIONS

The FORMULA of OXALIC ACID is C2H204...

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Medical DEFINITION of bleaching POWDER. : a white powderconsisting chiefly of calcium hydroxide, calcium chloride, and calcium hypochlorite USED as ableach, disinfectant, or deodorant — called also chloride of lime, chlorinated lime.

Empirical FORMULA of ethene = CH2
Empirical formula MASS of ethene =14 amu
= 1/2 — x MOLECULAR mass of ethene .
Empirical formula shows that ethene has (C : H):: 1 : 2
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For BCC ARRANGEMENT
R = √3a/4
PUT the values and get the answer

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A valence electron is an electron in an outer shell of an atom that can PARTICIPATE in FORMING CHEMICAL bonds with other atoms. In a single covalent BOND, both atoms in the bond CONTRIBUTE one valence electron in order to form a shared pair.

It is a mixture because the COMPOUND that made AIR are oxygen n CARBON dioxide....