Hi, I'm learning about Density in chemistry , and I'm confused about the exemplos that the professor give me about significant figure, because we told us that 0 is only significant if there is a number bigger then 1 in front . But on the example he give us, the first one he left the 0 but on the second he did not !! TUON88ΣChemistryÛ8=Density - MassD = mVolumeD =Density -mass for unit formulaXm= 2 = 19.8g25 mLCorrect answer =QD = m 19.89Ex. 25 ml of alcohol has a mas of 19.8g3 S.P.Chemistry★25.0ML0.79 9/mLCorrect answer= .792Biology= 0.79225.6VEx. 25.0 ml of alcohol has a mas of 19.8 g= 0.792 g/mLT3/mLMLSUntitled NotebookS.F> Significant figure19.8g / 25mL = 0.792

Answered: Hi, I'm learning about Density in…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Hi, I'm learning about Density in chemistry , and I'm confused about the exemplos that the professor give me about significant figure, because we told us that 0 is only significant if there is a number bigger then 1 in front . But on the example he give us, the first one he left the 0 but on the second he did not !!

TU
ON
88
Σ
Chemistry
Û
8
=
Density - Mass
D = m
Volume
D =
Density -mass for unit formula
X
m
= 2 = 19.8g
25 mL
Correct answer =
Q
D = m 19.89
Ex. 25 ml of alcohol has a mas of 19.8g
3 S.P.
Chemistry
★
25.0ML
0.79 9/mL
Correct answer= .792
Biology
= 0.792
25.6
V
Ex. 25.0 ml of alcohol has a mas of 19.8 g
= 0.792 g/mL
T
3/mL
ML
S
Untitled Notebook
S.F> Significant figure
19.8g / 25mL = 0.792

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Significant figure is determined based on some rules of addition/subtraction, multiplication/division. In multiplication/division the significant number will be according to the lowest number of significant figure present in the operation.

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