Which statement describes characteristics of a 0.01 M KOH(aq) solution? 1. The solution is acidic with a pH less than 7. 2. The

3 first significant figure
6 second significant figure
5 third significant figure
4 cannot exceed 5, so retain 5 instead of increasing it to 6

0.0365

Answer:

The result is "4,241.17 years"

Explanation:

The disintegration rate for C-14 atoms is indicated in  

The dissolution rate of the sample is given by

The C-14 proportion within the sample can be determined as per

With a half-life of 5730 years.

Now, we need to compute the number of half-lives (n) that are applicable:

Thus, the age of the sample is represented as =

                                                 

The element with atomic number 58 is Cerium, meaning its symbol should be Ce rather than Co, which belongs to Cobalt with atomic number 27. Therefore, the notation for isotopes consists of the element's symbol accompanied by a superscript and a subscript, properly aligned. The superscript indicates the mass number.

Mass number = protons + neutrons = 58 + 33 = 91

The subscript denotes the atomic number, which is 58. This notation is illustrated in the attached image.

Answer: The complete balanced chemical equation is,

Explanation:

A chemical equation represents the reactants on the left and the products on the right, separated by a right-pointing arrow indicating the reaction.

This representation includes the phases of the substances and uses subscripts and superscripts for numbers.

For the reaction given, the balanced chemical equation with phases is:

Hello!

To find [H₃O⁺], we will employ the Henderson-Hasselbalch equation, as this involves an acid and its conjugate base:





Next, we derive [H₃O⁺] using the definition of pH:





Hence, the concentration of [H₃O⁺] comes out to be 0.00014 M

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