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Yogita Ingle 5 years, 4 months ago
Boyle’s Law
According to Boyle’s Law, the pressure (P) of a given mass of gas is inversely proportional to its volume (V), provided that the temperature of the gas remains constant.
For an enclosed gas, at constant temperature (T);
P ∝ 1/V
or, P × V = constant
ie; P1V1 =P2V2
Posted by Kritika Gupta 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
The mole concept is a convenient method of expressing the amount of a substance. Any measurement can be broken down into two parts – the numerical magnitude and the units that the magnitude is expressed in. For example, when the mass of a ball is measured to be 2 kilograms, the magnitude is ‘2’ and the unit is ‘kilogram’.
Mansi Vekariya 5 years, 4 months ago
Posted by Kritika Gupta 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Dalton’s atomic theory was a scientific theory on the nature of matter put forward by the English physicist and chemist John Dalton in the year 1808. It stated that all matter was made up of small, indivisible particles known as ‘atoms’. The postulates and limitations of Dalton’s atomic theory are listed below.
Postulates of Dalton’s Atomic Theory
- All matter is made up of tiny, indivisible particles called atoms.
- All atoms of a specific element are identical in mass, size, and other properties. However, atoms of different element exhibit different properties and vary in mass and size.
- Atoms can neither be created nor destroyed. Furthermore, atoms cannot be divided into smaller particles.
- Atoms of different elements can combine with each other in fixed whole-number ratios in order to form compounds.
- Atoms can be rearranged, combined, or separated in chemical reactions.
Posted by Gaurav Moran 5 years, 4 months ago
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Mamali Mishra 5 years, 4 months ago
Posted by Yachna Solanki 5 years, 4 months ago
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Mamali Mishra 5 years, 4 months ago
Kritika Gupta 5 years, 4 months ago
Posted by Raj Yadav 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
The equation for calculating molarity is the ratio of the moles of solute whose molarity is to be calculated and the volume of solvent used to dissolve the given solute.
M = n/V
Here,
M is the molality of the solution that is to be calculated
n is the number of moles of the solute
V is the volume of solution given in terms of litres
Posted by Ayush Bansal 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Ionization enthalpy decreases down the group on moving from top to bottom in a periodic table.
Posted by Raj Solanki 5 years, 4 months ago
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Rewat Singh Shekhawat 5 years, 4 months ago
Posted by Lavish Kumar 5 years, 4 months ago
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Aarohi Singh 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
Anil does not hand over the thief to the police because he realized that Hari had learnt his lesson and had changed for the better. Otherwise, he would never have come back and kept the money at the same place from where he had stolen it. Anil even knew how Hari cheated him of a rupee a day while buying the day’s supplies. But he never said anything to him. This is such a case where most people would have handed him over to the police. Anil was different from such employers because he was a modest and trusting man. He had offered to teach Hari how to cook and also to educate him. When he found out that Hari had stolen the money, but had kept it back, he knew that it was Hari’s conscience that had made him do so. Hari could have easily run off with the money, but he did not. This made Anil give him another chance and build him into a better person that he could already see him becoming.
Posted by Lavish Kumar 5 years, 4 months ago
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Lavish Kumar 5 years, 4 months ago
Posted by Varsha Meena 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
First and foremost, keeping in mind that at room temperature, Oxygen is a gas.
So, Volume of Oxygen(O2) given = 5.6L.
Finding moles, Moles=Volume/22.4.
Moles= 5.6/22.4=1/4moles.
So, finding mass of O2= moles × Mol. Wt.
Mass( in grams) = 1/4 × 32. We have taken 32 as oxygen is is combined state O2, so 16×2=32.
We get, mass =8 grams.
Posted by Varsha Meena 5 years, 4 months ago
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Posted by Varsha Meena 5 years, 4 months ago
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Yachna Solanki 5 years, 4 months ago
Posted by Ashi Isha 5 years, 4 months ago
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Posted by Tanishq Yadav 5 years, 4 months ago
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Meghna Thapar 5 years, 4 months ago
Flux:
It is the substance added to molten metals to bond with impurities that can be readily removed.
Types of flux:
Fluxes are of two types, viz, acidic flux and basic flux.
(a) Acidic flux: It is an acidic oxide (oxide of a non-metal) like SiO2, P2O5, B2O3 (from borax). It is used to remove basic impurities like CaO, FeO, MgO etc. The acidic flux combines with a basic impurity to form a slag.
(b) Basic flux: It is a basic oxide (i.e. oxide of a metal) like CaO (obtained from limestone, CaCO3), MgO (from magnesite. MgCO3), haematite (Fe2O3) etc. It is used to remove acidic impurities like SiO2, P2O5 etc. The basic flux combines with an acidic impurity to form a slag.
Thus, slag can be defined as a fusible mass, which is obtained when a flux reacts with an infusible, acidic or basic impurity present in the oxide ore.
Posted by Lavish Kumar 5 years, 4 months ago
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Posted by Lavish Kumar 5 years, 4 months ago
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Lavish Kumar 5 years, 4 months ago
Yogita Ingle 5 years, 4 months ago
Limiting reagents are the substances that are completely consumed in the completion of a chemical reaction. They are also referred to as limiting agents or limiting reactants. According to the stoichiometry of chemical reactions, a fixed amount of reactants is required for the completion of the reaction. Let us consider the following reaction of formation of ammonia:
3H2 + N2 → 2NH3
Posted by Alir Engtipi 5 years, 4 months ago
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Posted by Alir Engtipi 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
According to Heisenberg ,it is impossible to measure both the position and momentum of moving particle with accuracy.
- If value of position is small ,it can be measured accurately but not momentum.
- If value of momentum is small it is measured accurately but not the position.
Mathematically that means:
ΔxΔp > h/2 π
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Aniket Yadav 5 years, 4 months ago
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Agent Wolf 5 years, 4 months ago
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Ashi Isha 5 years, 3 months ago
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