Which event best helped Becquerel determine uranium radiates rays?
1 answer:
You might be interested in
The reactants based on the reactivity capable of forming the products are . Thus, option A is correct.
The reactivity series has been the arrangement of the elements based on their reactivity. The highly reactive element has been capable of replacing the less reactive element in the compound, and form the product.
In the following reactions, the new product has been formed by:
From the reactivity series, Br has been more reactive than I, and thereby replaces iodine in the compound for the formation of product.
The compound has been formed with F. Cl has been less reactive than F, and will not be able to form the product.
The compound has been formed with Cl. Br has been less reactive than Cl, thus will not displaces Cl for the formation of new product.
The compound has been formed with F. I has been less reactive than F, and will not be able to form the product.
The reactants that will be able to form the products have been . Thus, option A is correct.
For more information about the reactivity series, refer to the link:
Answer:
0.51M
Explanation:
Given parameters:
Initial volume of NaBr = 340mL
Initial molarity = 1.5M
Final volume = 1000mL
Unknown:
Final molarity = ?
Solution;
This is a dilution problem whereas the concentration of a compound changes from one to another.
In this kind of problem, we must establish that the number of moles still remains the same.
number of moles initially before diluting = number of moles after dilution
Number of moles = Molarity x volume
Let us find the number of moles;
Number of moles = initial volume x initial molarity
Convert mL to dm³;
1000mL = 1dm³
340mL gives = 0.34dm³
Number of moles = initial volume x initial molarity = 0.34 x 1.5 = 0.51moles
Now to find the new molarity/concentration;
Final molarity = =
= 0.51M
We can see a massive drop in molarity this is due to dilution of the initial concentration.