Answer:
See below
Explanation:
Reactions require successful collisions between elements or molecules. A rise in temperature increases the movement of molecules. The more movement, the more collisions. The more collisions, the more reactions. The collisions release energy as heat which warms the flask and so on.
Answer:
the percent of actual fruit juice in the mixture will be 76%
Explanation:
given that we are mixing 2 bottles the total volume the mixture will be
mixture volume = volume bottle 1 + volume bottle 2 = 48 ounces + 32 ounces = 80 ounces
also the total quantity of juice will be
juice mass in mixture = juice bottle 1 + juice bottle 2 = 48 ounces * 1 + 32 ounces * 0.4 = 60.8 ounces of juice
therefore the concentration of juice in the mixture will be
concentration = 60.8 ounces of juice / 80 ounces = 0.76 (76%)
therefore the percent of actual fruit juice in the mixture will be 76%
Changing the concentration of one or more of the reactants can affect the rate of a reaction. This is TRUE, as it means there are more collisions between particles and therefore a higher probability of successful collisions, which speeds the reaction up.
Using the reactants in a fine, powder form rather than a large, chunky form will increase the rate of a chemical reaction as the surface area of the reactants will increase. Therefore, there is a higher probability of successful collisions, which speeds the reaction up.
A catalyst works by increasing the activation energy needed for a reaction. This is TRUE, and the catalyst itself is not used up.
Sorry I couldn't get back to you earlier. I usually use the Brainly app so am unable to check comments on my wall.
According to the reaction equation:
and by using ICE table:
CN- + H2O ↔ HCN + OH-
initial 0.08 0 0
change -X +X +X
Equ (0.08-X) X X
so from the equilibrium equation, we can get Ka expression
when Ka = [HCN] [OH-]/[CN-]
when Ka = Kw/Kb
= (1 x 10^-14) / (4.9 x 10^-10)
= 2 x 10^-5
So, by substitution:
2 x 10^-5 = X^2 / (0.08 - X)
X= 0.0013
∴ [OH] = X = 0.0013
∴ POH = -㏒[OH]
= -㏒0.0013
= 2.886
∴ PH = 14 - POH
= 14 - 2.886 = 11.11