Answer:
There are a number of ways that you could investigate the effect of changing the temperature on the rate of a reaction in Chemistry. ... This includes using apparatus safely, and monitoring chemical changes.
Explanation:
There are three main methods of measuring rate:
measuring the volume of gas given off by a reaction over time.
measuring the loss of mass of a reaction over time when a gas is produced.
Answer:
1260 rotations
Explanation:
From the question given above, the following data were obtained:
Diameter of tyre = 16 in
Number of rotation =?
Next, we shall determine the radius of the tyre. This can be obtained as follow:
Diameter (d) of tyre = 16 in
Radius (r) of tyre =?
r = d / 2
r = 16/2
Radius (r) = 8 in
Next, we shall determine the circumference of the tyre. This can be obtained as follow:
Radius (r) of tyre = 8 in
Pi (π) = 22/7
Circumference (C) of tyre =?
C = 2πr
C = 2 × 22/7 × 8
C = 50.29 m
Finally, we shall determine the number of rotation. This can be obtained as follow:
Circumference (C) of tyre = 50.29 m
Number of rotation (n) =?
n = 63360 / C
n = 63360 / 50.29
n = 1260 rotations
Therefore, the tyre will make 1260 rotations
The main formula is as follow is explained in the attached file (please look at the examples)
the 1,3- butadiene is h2c=ch-ch=ch2, so we have
sp² sp² sp² sp²
h2c = ch - ch = ch2
<span>the hybridization of the carbon atoms is </span>sp² : trigonal planar
Answer:
(C) A metal rail rusting Is an example of chemical change.
Explanation:
When a chemical change takes a place a new substance is formed.
HOPE IT HELPS.....