Why 5.67 + 0.00032 = 5.67 (and not 5.7 or 5.67032 or any other number).

Chemistry

1 answer:

vlabodo [156]3 years ago

5 0

The answer must show the lowest number of significant number of significant places in the decimal region

Explanation:

5.67 + 0.00032 adds up to 5.67 because the least number of significant figures in the decimal place 2.

To add up two numbers, that are in decimal places.
Identify the number of significant figures in them
Their addition should sum up to a value no more than the significant figures to the right of the decimal having the lowest accuracy.

5.67

+ 0.00032

to the right of the decimal, they have two significant numbers.

The answer should also be this way.

learn more:

Significant figures brainly.com/question/6443737

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A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t

777dan777 [17]

The molar extinction coefficient is 15,200 $M^{-1} cm^{-1}$ .

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = $\frac{A}{cl}$