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mrs_skeptik [129]
3 years ago
12

Any zero in a measurement is always significant True Or False

Chemistry
1 answer:
weqwewe [10]3 years ago
3 0

Answer:

False

Explanation:

A significant number is a number that is used to express the accuracy in a measurement. There are some rules that binds the identification of significant figures when reporting a scientific measurement.

  • All non-zero numbers are significant
  • Zeros in between two digits are significant.
  • Zeros to the right of the decimal are significant.
  • Leading zeros are just place holders and are not significant.
  • Trailing zero in a whole number with decimal is significant
  • Trailing zero without a decimal is not significant.

source: http://ccnmtl.columbia.edu/projects/mmt/frontiers/web/chapter_5/6665.html

We can see that not all zeros in a measurement is significant. For example, 540 has 2 significant numbers because the zero is not significant but 540.2 has 4 significant numbers.

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A 16.42 mL volume of 0.1327 M KMnO4 solution is needed to oxidize 25.00 mL of a FeSO4 solution in acidic medium. What is the con
statuscvo [17]

The concentration of the FeSO4 solution in molarity would be 0.4356

The concentration can be derived first by writing out the balanced equation of the reaction:

  • 5Fe^2^++MnO^4^-+8H^+--->5Fe^3^++Mn^2^++4H_2O

From the balanced equation: for every 1 mole of KMnO4, 5 moles of FeSO4 is needed for complete oxidation.

Recall that: mole = molarity x volume

Mole of KMnO4 needed = 0.1327 x 0.01642

                  = 0.002179 mole

1 mole KMnO4 = 5 mole FeSO4

0.002178 mole = 5 x 0.002178/1

                             = 0.01089 moles of FeSO4

Molarity of FeSO4 = mole/volume

                                 = 0.01089/0.025

                               = 0.4356 M

More on the calculation of molarity of solutions can be found here: brainly.com/question/16587536

6 0
2 years ago
Four properties of water are listed.
scoray [572]
It is colorless and oderless is a physical property by telling what color.
4 0
3 years ago
PLEASE HELP ASAP
Leni [432]

Answer:

the answer is B

Explanation:

the answer is B

4 0
3 years ago
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Sodium (Na) A Homogeneous Mixture B Element C Compound D Heterogeneous Mixture
laiz [17]
Sodium is categorized as a B. Element.
3 0
3 years ago
A solution is prepared by dissolving 8.75 grams of sodium chloride in enough volume of water to produce 112.0 grams of the NaCl
ICE Princess25 [194]

Answer : The percent by mass of the solution is 7.81 %

Explanation : Given,

Mass of NaCl = 8.75 g

Mass of solution = 112.0 g

Now we have to determine the percent by mass of the solution.

\text{Mass percent}=\frac{\text{Mass of NaCl}}{\text{Mass of solution}}\times 100

Putting values in above equation, we get:

\text{Mass percent}=\frac{8.75g}{112.0g}\times 100=7.81\%

Therefore, the percent by mass of the solution is 7.81 %

6 0
3 years ago
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