Select the INCORRECT statement/s from the fol | vedclass

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Question

(B) Exact numbers like $22$ books have an infinite number of significant figures. This statement is correct.$(b)$ $2.5 	imes 1.25 = 3.125$. Since $2.

Vedclass · Accepted Answer

$b$ and $c$ only

Vedclass · Answer

(B) Exact numbers like $22$ books have an infinite number of significant figures. This statement is correct.$(b)$ $2.5 	imes 1.25 = 3.125$. Since $2.5$ has two significant figures and $1.25$ has three,the result should be rounded to two significant figures $(3.1)$. Thus,the statement that it has four significant figures is incorrect.$(c)$ Zeros preceding the first non-zero digit are not significant (e.g.,$0.0025$ has two significant figures). Thus,this statement is incorrect.$(d)$ $12.11 + 18.0 + 1.012 = 31.122$. In addition,the result should be reported to the same number of decimal places as the term with the fewest decimal places ($18.0$ has one decimal place). The result should be $31.1$,which has three significant figures. This statement is correct.Therefore,the incorrect statements are $(b)$ and $(c)$.

Physical Quantity	Unit
$(A)$ Molarity	$(1)$ $g \ mL^{-1}$
$(B)$ Mole fraction	$(2)$ $mol$
$(C)$ Mole	$(3)$ $Pascal$
$(D)$ Molality	$(4)$ $Unitless$
$(E)$ Pressure	$(5)$ $mol \ L^{-1}$
$(F)$ Luminous intensity	$(6)$ $Candela$
$(G)$ Density	$(7)$ $mol \ kg^{-1}$
$(H)$ Mass	$(8)$ $N \ m^{-1}$
	$(9)$ $kg$

Similar Questions

The density of mercury is $13.6 \, g/cm^3$. Find the mass of $1 \, L$ of mercury. (in $, g$)

How many significant figures are present in the following?
$(i)$ $0.0025$ $(ii)$ $208$ $(iii)$ $5005$ $(iv)$ $126,000$ $(v)$ $500.0$ $(vi)$ $2.0034$

Round up the following up to three significant figures:
$(i) 34.216$
$(ii) 10.4107$
$(iii) 0.04597$
$(iv) 2808$

What do you mean by significant figures?

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