Double the work done by the object.Hope this helps
Answer:
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<h3>Answer:</h3>
Mass = 200 g
<h3>Solution:</h3>
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Molarity = 2.0 mol.L⁻¹
Volume = 2.5 L
M.Mass = 40.0 g.mol⁻¹
First calculate Moles as,
Moles = Molarity × Volume
Putting Values,
Moles = 2.0 mol.L⁻¹ × 2.5 L
Moles = 5 mol
Secondly, calculate Mass using following formula,
Moles = Mass ÷ M.Mass
Solving for Mass,
Mass = Moles × M.Mass
Putting Values,
Mass = 5 mol × 40.0 g.mol⁻¹
Mass = 200 g
<h3>
Solution Preparation:</h3>
Add 200 g of NaOH in a Volumetric Flask and add distilled water upto the mark of 2.5 L. Shake it and you have prepared a 2.5 L of 2.0 M solution of NaOH.
Answer:
ZnO(s)—ZnO(s)
Explanation:
i considered a reaction of physical change since nothing is affected and thesalt I'd not hydrated so no mass is lost through loss of water or escape of gases to atmosphere
here the reaction only changes colour yellow to white or vice versa