Chemistry
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Chapters
- 1 Some Basic Concepts of Chemistry
- 2 Introduction to Analytical Chemistry
- 3 Basic Analytical Techniques
- 3 Some Analytical Techniques
- 4 Structure of Atom
- 5 Chemical Bonding
- 6 Redox Reactions
- 7 Modern Periodic Table
- 8 Elements of Group 1 and 2
- 9 Elements of Group 13, 14 and 15
- 10 States of Matter
- 11 Adsorption and Colloids
- 12 Chemical Equilibrium
- 13 Nuclear Chemistry and Radioactivity
- 14 Basic Principles of Organic Chemistry
- 15 Hydrocarbons
- 16 Chemistry in Everyday Life
Top questions
See all →- E. A student used a carbon pencil to write his homework. The mass of this was found to be 5 mg. With the help of this calculate. Given : mass of carbon = 5mg = 5× 10⁻³ g Atomic mass of carbon=12u Solution :: a. The number of moles of carbon in his homework writing numb... 1
- M.In two moles of acetaldehyde (CH3 CHO) calculate the following a. Number of moles of carbon b. Number of moles of hydrogen a) Number of moles of carbon 1 molecule of CH3CHO contains 2 C-atoms. Therefore, 2 mol of CH3CHO contains 2×2 = 4 moles of Carbon. b) Number... 1
- F. What will happen if the upper outlet of the condenser is connected to the tap instead of the lower outlet? It is necessary to cool the condenser with cool water for proper functioning of condenser. If tap is connected to the upper outlet then jack... 2
- P. Perform each of the following calculations. Round off your answers to two digits Refer below image for detailed solution 2
- Q. Perform each of the following calculations. Round off your answers to three digits. Solution:: 5.02×10¹⁰ , 2
- A 1.000 mL sample of acetone, a common solvent used as a paint remover, was placed in a small bottle whose mass was known to be 38.0015 g. Precision: Measurement Mass of acetone observed (g) 1 38.7798-38.0015=0.7783 2 38.7795-38.0015=0.7780 3 38.7801-38.0015=0.7786 Mean= 0.7783... 2