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ExtremeBDS [4]
3 years ago
8

List in order which digits are significant in the following numbers:

Chemistry
1 answer:
ozzi3 years ago
5 0

Answer:  see below

<u>Explanation:</u>

Zeros between the digit and decimal point are NOT significant.

Zeros between digits ARE significant.

a. 230 mL.              sf: 23

b. 0.00540 s          sf: 540

c. 1440                    sf: 144

d. 50 ℃                  sf: 5

e. 0.9405 g/cm3    sf: 9405

f. 700 jellybeans    sf: 7

g. 1.05 x 10⁶            sf: 105

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Explanation:

The given reaction is as follows.

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        n = 0.05 L \times 0.1 M

           = 0.005 mol

After the addition of 25 ml of base, the pH of a solution is 3.62. Hence, moles of NaOH is 25 ml base are as follows.

             n = 0.025 L \times 0.1 M

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According to ICE table,

         HA(aq) + NaOH (aq) \rightleftharpoons NaA(aq) + H_{2}O(l)

Initial:     0.005 mol   0.0025 mol              0                  0

Change: -0.0025 mol  -0.0025 mol        +0.0025 mol

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          [HA] = \frac{0.0025 mol}{V}

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Suppose that you take 200 mg of an antibiotic every 8 hr. The​ half-life of the drug is 8 hr​ (the time it takes for half of the
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