Answer:
a) 0.000112 M/s is the average reaction rate between 0.0 seconds and 1500.0 seconds.
b) 0.00011 M/s is the average reaction rate between 200.0 seconds and 1200.0 seconds.
c) Instantaneous rate of the reaction at t=800 s :
Instantaneous rate :
Explanation:
Average rate of the reaction is given as;
a.) The average reaction rate between 0.0 s and 1500.0 s:
At 0.0 seconds the concentration was =
At 1500.0 seconds the concentration was =
0.000112 M/s is the average reaction rate between 0.0 seconds and 1500.0 seconds.
b.) The average reaction rate between 200.0 s and 1200.0 s:
At 0.0 seconds the concentration was =
At 1500.0 seconds the concentration was =
0.00011 M/s is the average reaction rate between 200.0 seconds and 1200.0 seconds.
c.) Instantaneous rate of the reaction at t=800 s :
At 800 seconds the concentration was =
Instantaneous rate :
Answer:
Which phrase best describes wave motion? Movement of energy through space or a medium.
Explanation:
Answer option A.
You must know and use the formula for pH.
pH = - log [H3O+], where [H3O+] is the molar concentration of hydronium ion.
So, when pH is 8.0 => 8.0 = - log [H3O+] and you can use antilogarithm (the inverse function of logarithm) to find [H3O+], in this way:
[H3O+] = 10^-8 = 1 * 10 ^-8 M
When, pH = 7.0 =>
7.0 = - log [H3O+] => [H3O+] = 1 * 10^ -7 M
Answer: 1*10^-7 mole / liter
Answer:
Cr(OH)4^-
Explanation:
Reducing agents are elements or compounds which loses (or "donates") an electron to an electron recipient (oxidizing agent) in a redox chemical reaction. A reducing agent is thus oxidized when it loses electrons in the redox reaction.
A reducing agent is a substance that causes another substance to be reduced. Hence for us to identify an reducing agent, we simply look at the oxidation number of a specie before and after the redox reaction. If the oxidation number is greater in the product, then it lost electrons and the substance is the reducing agent.
If we look from left to right, the oxidation number of chromium increased from +3 to +6. Hence the specie Cr(OH)4^- is the reducing agent in the reaction.
Answer:
work lost due to friction
Explanation:
The work output of any real machine is usually less than the work needed to operate the machine due to the fact that <u>some input work is lost due to friction.</u>
<em>Frictional forces are those forces that oppose the motion of 2 surfaces sliding against each other and this is one of the reasons machines do not work at 100% efficiency. When the opposition happens, some of the input work is converted to heat.</em>