#10cm^3# of normal specimen of human blood contains 1.2g of hemoglobin. How many grams does #35cm^3# of the same blood contain?

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Answer 1 · 2016-09-17T16:00:05

#4.2g#

You can do this using 2 methods:

Method 1: The unitary method where you work out for 1 #cm^3#

In #10cm^3# of blood .... #1.2g#

In #1cm^3# of blood ....#1.2 div 10 = 0.12g#

In #35cm^3# of blood ....#35xx0.12g = 4.2g#

Method 2: The direct proportion or comparison method

#(10cm^3)/(35cm^3) = (1.2g)/(x g)" "rarr# cross-multiply

#10xx x = 35 xx1.2#

#x = (35xx1.2)/10#

#x = 4.2g#