Answer: Both images seem to represent hail and ice, these conditions are only brought by chilly temperatures and rain.
No work is done
Explanation:
The balancing of the coin on his finger tip is not work done.
Work is done when a force is applied to a body and it moves it through a distance in the direction of the force.
Work is done:
- Force is applied on a body
- Distance is move
No force has been applied on the coin to move it any distance.
Therefore, no work is done on the balanced coin
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The balanced equation for the acid base reaction is as follows
Ca(OH)₂ + 2HCl ---> CaCl₂ + 2H₂O
stoichiometry fo Ca(OH)₂ to HCl is 1:2
number of HCl moles reacted - concentration of HCl x volume
number of HCl moles - 0.225 mol/L x 26.85 x 10⁻³ L = 6.041 x 10⁻³ mol
according to molar ratio
2 mol of HCl reacts with 1 mol of Ca(OH)₂
therefore 6.041 x 10⁻³ mol of HCl reacts with - 6.041 x 10⁻³ /2 mol = 3.021 x 10⁻³ mol
number of Ca(OH)₂ moles in 10.0 mL - 3.021 x 10⁻³ mol
therefore Ca(OH)₂ moles in 1000 mL - 3.021 x 10⁻³ mol / (10.0 x 10⁻³ L) = 0.302 mol/L
molarity of Ca(OH)₂ - 0.302 M
In order to compute the mass of each solute in the sample, we simply multiply the percentage mass of each solute with the total mass of the solution. This is ad such:
Mass (NaCl) = 0.0486 x 294
Mass (NaCl) = 14.29 grams
Mass(Na₂CO₃) = 0.0754 x 294
Mass(Na₂CO₃) = 22.17 grams