Advertisements
Advertisements
प्रश्न
If 0.2 mol of the following substance is required how many grams of that substance should be taken?
magnesium oxide
उत्तर
Molar mass of MgO = 24 + 16 = 40 g/mol
Number of moles of a substance = `"Mass of the substance in grams"/"Molecular mass of the substance"`
Let Mass of the substance in grams be x,
`0.2 = "x"/40 = 8`g
we need, 8g of MgO to obtain 0.2 moles of MgO.
APPEARS IN
संबंधित प्रश्न
What is the mass of 1 mole of nitrogen atoms?
What is the mass of 10 moles of sodium sulphite (Na2SO3)?
Convert into mole.
22 g of carbon dioxide
What name is given to the amount of substance containing 6.022 × 1023 particles(atoms,molecules or ions) of a substance ?
How many atoms are there in 0.25 mole of hydrogen ?
What is the value of Avogadro's number?
Explain the term : Gram atom
Fill in the blank
Avogadro's number is equal to ______
A sample of ammonium nitrate when heated yields 8.96 litres of steam (measured at STP)
NH4NO3 → N2O + 2H2O
Determine the percentage of oxygen in the ammonium nitrate?
Calculate the number of gram atoms in 4.6 grams of sodium (Na = 23)
What is the value of molar volume of a gas at S.T.P?
Define or explain the term:
Mole
Find the number of molecules in 73 g of HCl.
Calculate the mass of 0.1 mole of the following:
Mg
(Ca = 40, Na = 23, Mg = 24, S = 32, C = 12, Cl = 35.5, O = 16, H = 1)
Determine the number of molecules in a drop of water which weighs 0.09 g.
If phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100g of phosphorus?
Which of the following weighs the least?
Correct the statement, if required.
The relative atomic mass of an element is the number of times one molecule of an element is heavier than `1/12` the mass of an atom of C12.
1 mole of any substance contains ______ molecules.
Deduce the number of molecules of the following compound in the given quantity.
7.1g chlorine
