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djverab [1.8K]
3 years ago
10

In the periodic table we use today, the ordering of the elements is based on _____.

Chemistry
1 answer:
Firdavs [7]3 years ago
3 0
<span>The ordering of the elements is based on Atomic number. 
Atomic number is the number of protons inside the nucleus of an atom. 

Ordering is from left to right. Atomic number increases successively from left t</span>o right.
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3 0
3 years ago
At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s
Shalnov [3]

Answer : The time taken for the reaction is, 28 s.

Explanation :

Expression for rate law for first order kinetics is given by :

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,

k = rate constant  = 0.0632

t = time taken for the process  = ?

[A_o] = initial amount or concentration of the reactant  = 1.28 M

[A] = amount or concentration left time 't' = 1.28\times \frac{17}{100}=0.2176M

Now put all the given values in above equation, we get:

0.0632=\frac{2.303}{t}\log\frac{1.28}{0.2176}

t=28s

Therefore, the time taken for the reaction is, 28 s.

8 0
3 years ago
For a concentration technique, Stotal is given as 19.31 ± 0.035, Smb is 0.22 ± 0.008, and kA is 0.154 ± 0.007 ppm–1, where Stota
professor190 [17]

Answer:

B

Explanation:

8 0
2 years ago
Which of the following is a true statement?
maria [59]

Answer:

the second one seems right :)

Explanation:

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3 years ago
A runner completes a 400-meter race in 2.5 mins. What is the runner's average speed?
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The average speed is 160 meters a minute.
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