What name is given to the amount of substance containing 6.022 × 10²³ particles(atoms, molecules or ions) of a substance?

Academic Chemistry NCERT Class 9

The name given to the amount of substance containing 6.022 × 10²³ particles is 1 mole.

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Updated on: 10-Oct-2022

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What name is given to the number of 6.022 × 1023?
Pick up the wrong pairs/combination(a) 6.022 x 1023 molecules of oxygen = 32 g of oxygen(b) 6.022 x 1023 ions of sodium = 23 g of Na(c) 6.022 x 1023 atoms of C = 24 g of carbon(d) 6.022 x 1023 atoms of H = 1 g of H atom.
What is a group of 6.022 × 1023 particles known as?
(a) How many atoms are there in exactly 12 g of carbon -12 element? (C = 12 u)(b) What name is given to this number?(c) What name is given to the amount of substance containing this number of atoms?
Fill in the following blanks :(a) 1 mole contains ...................... atoms, molecules or ions of a substance.(b) A mole represents an ..................... number of particles of a substance.(c) 60 g of carbon element are ................... moles of carbon atoms.(d) 0.5 mole of calcium element has a mass of ......................(e) 64 g of oxygen gas contains ....................... moles of oxygen atoms.
What name is given to the process of heating a substance in absence of air ?
Find the mass of the following:(i) 6.022 x 1023 number of O2 molecules(ii) 1.5 mole of CO2 molecule.
3.42g of sucrose are dissolved in 18g of water in a beaker. The number of oxygen atoms in the solution are(a) 6.68 X 1023(b) 6.09 X 1022(c) 6.022 X 1023(d) 6.022 X 1021
What is the meaning of substance?
A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.(a) What is substance P? Write its common name as well as chemical formula.(b)What is substance Q?(c)What is gas R?(d)What is substance S? What is its clear solution known as?(e)What is substance T? Name any two natural forms in which substance T occurs in nature?
When a lot of dry powder of a substance X is released over a fire, the fire gets extinguished.(a) Name the substance X.(b) How does this substance extinguish the fire?(c) Name another substance which behaves like X.
There are three substances X, Y and Z. The substance X does not have a fixed melting point or boiling point and it still shows the inpidual properties of its constituents. The substance Y is a pure substance which occurs in nature as such. The substance Y has a fixed melting point and boiling point but it cannot be broken down into simpler substances by any chemical means. The substance Z is also a pure substance whose properties are entirely different from those of its constituents. The substance Z can however, be divided by electrolysis into two substances which belong to the same class of substances as Y.(a) What type of substance could X be? Name one substance like X.(b) What type of substance could Y be? Name one substance like Y.(c) What type of substance could Z be? Name one substance like Z.(d) Which process involves absorption or release of an appreciable amount of energy : formation of substance X or formation of substance Z?(e) Name the three groups into which all the substances like Y are divided on the basis of their properties.
What is the significance of the formula of a substance?
Name of the chemical substance which constitute the genes is?
When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?

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