Answer:
iv. The motion between A & B moves at a further distance than C & D's
v. The cyclist travels 800 meters
vi. It takes approx. 80 seconds
vii. The cyclist's speed is 10 meters per second (m/s)
viii. The cyclist's speed is also 10 meters per second (m/s)
vii. (2) The cyclist's average speed is 10 meters per second (m/s)
Explanation:
Speed is calculated using the formula distance divided by time (d/t)
vii (2) needs further explanation:
Though there is a moment of rest, the cyclist still travels the same speed throughout the entire trip. To check this answer however, you can total the distance and time the cyclist traveled and use speed formula to get 10 meters per second, again.
Answer:
Compound state
Explanation:
Because reactive elements mostly react immediately with other elements
From the given balanced chemical reaction, 4NH3 + O2 ---> 2N2 + 6H2O, the ratio of the number of moles of NH3 consumed to the number of moles N2 produced is 4:2 or 2:1. Thus, for 1 mole of N2 produced, 2 moles of NH3 are consumed.
Answer:
pH = 5.58
Explanation:
Given that :
Citric acid is a triprotic acid with the formula
. Tripotic acids are acids that have the tendency to yield three protons per molecule during the phases of dissociation, therefore they have three pka.
For Citric acid; the pka values are:

So, the pH of sodiummonohydrogencitrate with the chemical formula
which can act as an acid and a base (i.e it is said to be amphoteric) can be calculated as :


pH = 5.58
Therefore, the approximate pH of a solution of sodium monohydrogencitrate = 5.58