Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Royal Thakur ? 4 years, 4 months ago
- 1 answers
Posted by Harish Tode 4 years, 10 months ago
- 1 answers
Gaurav Seth 4 years, 10 months ago
CO is isoelectronic with NO+ and N2. CO has 14 electrons, 8 from oxygen and 6 from carbon. NO has 15 electrons 8 from oxygen and 7 from nitogen. But, as it becomes NO+, it loses an electron and the number of electrons is 14. Similarly, N2 has 14 electrons, 7 from each of the nitrogen atoms.
Posted by Royal Thakur ? 4 years, 4 months ago
- 1 answers
Sia ? 4 years, 4 months ago
A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.
Posted by Mandeep Sidhu 4 years, 10 months ago
- 1 answers
Gaurav Seth 4 years, 10 months ago
This usually occurs in organic chemistry . Take acetic acid and formaldehyde and glucose.
Acetic acid = CH3COOH - C2H4O2 Empirical formula = CH2O
Formaldehyde = CH2O
Glucose C6H12O6 = empirical formula = CH2O
Butene= molecular firmula is C4H8 but its empericsl formula is CH4
Posted by Royal Thakur ? 4 years, 10 months ago
- 2 answers
Pk ⚔️ 4 years, 10 months ago
Pk ⚔️ 4 years, 10 months ago
Posted by Royal Thakur ? 4 years, 10 months ago
- 2 answers
Pk ⚔️ 4 years, 10 months ago
Pk ⚔️ 4 years, 10 months ago
Posted by Royal Thakur ? 4 years, 10 months ago
- 3 answers
Pk ⚔️ 4 years, 10 months ago
Posted by सत्य सनातन? 4 years, 10 months ago
- 3 answers
Gaurav Seth 4 years, 10 months ago
Preparation of Washing Soda
It is prepared by Solvay’s process.
(1) A cold and concentrated solution of sodium chloride is reacted with ammonia and carbon dioxide to obtain sodium hydrogen carbonate.
(2) Sodium hydrogen carbonate is separated by filtration,dried and heated.Oh heating sodium hydrogen carbonate decomposes to form sodium carbonate.
(3) Anhydrous sodium carbonate is dissolved in water and recrystallised to get washing soda crystals containing 10 molecules of water of crystallisation.
Meghna Thapar 4 years, 10 months ago
The Solvay process or ammonia-soda process is the major industrial process for the production of sodium carbonate. The ammonia-soda process was developed into its modern form by the Belgian chemist Ernest Solvay during the 1860s. The ingredients for this are readily available and inexpensive: salt brine and limestone. The Solvay process is an industrial process that uses limestone (CaCO3 ) to produce carbon dioxide (CO2 ) which reacts with ammonia (NH3 ) dissolved in brine (concentrated NaCl(aq)) to produce sodium carbonate.
Posted by Priya Yadav 4 years, 10 months ago
- 2 answers
Gaurav Seth 4 years, 10 months ago
In first compound:
Weight percent of carbon = 42.9
Weight percent of oxygen = 100 - 42.9 = 57.1
In second compound:
Weight percent of carbon = 27.3
Weight percent of oxygen = 100 - 27.3 = 72.7
Now in first compound:
57.1 parts by weight of oxygen combine with 42.9 parts by weigh of carbon
1 part by weight of oxygen will combine with
Now in second compound:
72.7 parts by weight of oxygen combine with 27.3 parts by weight of carbon
1 part by weight of oxygen will combine with 
parts of carbon.
The weights of carbon which combine with same weights of oxygen in two compounds bear a ratio 0·751 : 0·375 or 2 : 1. This is a simple ratio. Hence, the data illustrates the law of multiple proportion.
Posted by Emmanuel Santhosh 4 years, 10 months ago
- 1 answers
Yogita Ingle 4 years, 10 months ago
Atomic hydrogen or oxy-hydrogen torch involves the formation of atomic hydrogen atoms that are produced by dissociation of dihydrogen with the help of an electric arc.
Posted by Royal Thakur ? 4 years, 10 months ago
- 1 answers
Sia ? 4 years, 4 months ago
In chemistry, a formal charge is the charge assigned to an atom in a molecule, assuming that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity.
Posted by Sm .. 4 years, 10 months ago
- 2 answers
Dhruv Agrawal 4 years, 10 months ago
Posted by Mahi Chaudhary 4 years, 10 months ago
- 1 answers
Gaurav Seth 4 years, 10 months ago
Given density of aqueous solution is 1.41 gm/ml of which 69% is nitric acid (HNO3).
So, 69% of 1.41 => 1.41 x 69/100 = 0.9729
Density of Nitric Acid = 0.9729 gm/ml
Now, Density = Mass/Volume. So,
0.9729 = Mass of HNO3/1000ml
Mass of HNO3 = 972.9 gm
No. of moles of HNO3 = Mass of HNO3/Molar mass of HNO3
= 972.9/63
= 15.44 mol.
So Molarity of HNO3 = No. of moles of HNO3/Volume of Solution
= 15.44/1 L
= 15.44 M
(Note) : We find molarity because in the question it is asked to moles per litre which is molarity(M).
Posted by Sarbinong Tokbi 4 years, 10 months ago
- 1 answers
Gaurav Seth 4 years, 10 months ago
A microscope using suitable photons is employed to locate an electron in an atom within a distance of 0.1Å. What is the uncertainty involved in the measurement of its velocity?
<hr />According to Heisenberg’s uncertainty principle.
Substituting the values in expression (1), we have
Posted by Ashish Rajput 4 years, 10 months ago
- 0 answers
Posted by Royal Thakur ? 4 years, 10 months ago
- 1 answers
Priya Yadav 4 years, 10 months ago
Posted by Åmrît Râj 4 years, 10 months ago
- 0 answers
Posted by Akshitha L.S. 4 years, 10 months ago
- 1 answers
Posted by Royal Thakur ? 4 years, 4 months ago
- 1 answers
Sia ? 4 years, 4 months ago
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
Posted by Phuentsok Om 4 years, 10 months ago
- 0 answers
Posted by Harsh V 4 years, 10 months ago
- 1 answers
Posted by Royal Thakur ? 4 years, 10 months ago
- 3 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Sia ? 4 years, 4 months ago
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
0Thank You