The grams of CuCl2 required to prepare 1250g of 1.25% by mass is calculated as follow
1250 = 100%
what about 1.25%
by cross multiplication
= 1.25 x1250/100 = 15.63 grams
Answer:
Mass of NaOH required= 60 g
Explanation:
Given data:
Mass of NaHCO₃ = 126 g
Mass of NaOH required = ?
Solution:
Chemical equation:
NaOH + CO₂ → NaHCO₃
Number of moles of NaHCO₃:
Number of moles = mass/ molar mass
Number of moles = 126 g/ 84 g/mol
Number of moles = 1.5 mol
Now we will compare the moles of NaHCO₃ and NaOH.
NaHCO₃ : NaOH
1 : 1
1.5 : 1.5
Mass of sodium hydroxide:
Mass = number of moles × molar mass
Mass = 1.5 mol × 40 g/mol
Mass = 60 g
A comet is made of dust particles and ice, so B.comet
The reagent in the chemical reaction which oxidizes other reactants but itself reduces are called oxidizing agent.
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