Radioactive material obeys 1st order decay kinetics,
For 1st order reaction, we have
k =
where, k = rate constant of reaction
Given: Initial conc. 100, Final conc. = 6.25, t = 18.9 hours
∴ k =
= 0.1467 hours^(-1)
Now, for 1st order reactions: half life =
= 4.723 hours.
Answer:
It takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1. The reaction produces two water molecules, so the mole ratio between oxygen and water is 1:2, but the mole ratio between water and hydrogen is 2:2.
Explanation:
Hey There!
Molar mass KBrO2 = 151.0011 g/mol
1 mole KBr --------- 151.0011 g
So in 0.168 moles :
mass = number of moles * molar mass
mass = 0.168 * 151.0011
mass = 25.36 g of KBrO2
Answer:
in plant and animal cells
Explanation:
It happens in both and occurs in the mitochondria.
The best assessment of Gina's prediction is that the several medium-sized cubes will dissolve faster than the large cube of sugar.
<h3>How does surface area affect solubility?</h3>
The surface area of a substance refers to the total area on the surface of that object.
Surface area plays a vital role in the dissolution of a substance. When a solute dissolves, the action takes place only at the surface of each particle.
This suggests that when the total surface area of the solute particles is increased, the solute dissolves more rapidly, hence, the best assessment of Gina's prediction is that the several medium-sized cubes will dissolve faster.
Learn more about surface area at: brainly.com/question/2835293
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