0.25 g of U-235 isotope will be left.
<h3><u>
Formula used :</u></h3>
N = N₀/2
where,
N = amount of U-235 left after n-half lives = ?
N₀ = Initial amount of the U-235 = 1.00 g
n = number of half lives passed = 2ⁿ
Using the formula, we can conclude:
N = 1/2² = 0.25
Thus, 0.25 g of U-235 isotope will left .
<h3><u>The concept of half lives</u></h3>
A half-life is the amount of time it takes for something to go from 100% to 50%. The phrase is most frequently used in reference to radioactive decay, which happens when energetic atomic particles that are unstable lose momentum. There are 29 elements that have been shown to be capable of going through this process.
Like pharmaceuticals, advertising campaigns, and a variety of other things, information likewise has a half-life.
To view more questions based on half lives, refer to:
brainly.com/question/27144626
#SPJ4
Answer:
Explanation:
KCL + AgNO3 = AgCl + KNO3
equal moles
25.7g KCl/74.5 g/mol=0.345 mol
0.345mol/0.9 L= 0.383 molar
0.383 mol/L times 0.0325L= 0.013 mol KCl
Therefor need 0.013 mol AgNO3
0.013 mol AgNO2/0.036 L = 0.35 molar
Answer: Oxidation reaction occurs when a reactant losses electrons in the reaction.
Reduction reaction occurs when a reactant gains electrons in the reaction.
Explanation: Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.
Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.
Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.
Answer:
1. This reaction is <u>(A) Exothermic .</u>
2. When the temperature is decreased the equilibrium constant, K: <u>(A) Increases</u>
3.When the temperature is decreased the equilibrium concentration of Co2:<u> (A) Increases</u>
Explanation:
1. The pink color predominates at low temperatures, indicating that the commodity is preferred.
This is a reaction that is <u>exothermic.</u>
2. As the decrease in the temperature , the equilibrium constant , K ;
equilibrium constant = =
As the temperature drops, the concentration of and rises, and K rises as well , thus it <u>increases </u>.
3. The equilibrium concentration of decreases as the temperature decreases:
When the temperature is lowered, the equilibrium shifts to the right , that is it <u>increases.</u>