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Unit Conversions - Montgomery College - convert g ml to g l

Unit Conversions - Montgomery College-convert g ml to g l

Unit Conversions
Important Tips
Always write every number with its associated unit.
Always include units in your calculation.
you can do the same kind of operations on units as you can on numbers
using units as a guide to problem solving is called dimensional analysis
Conversion factors are relationships between two units
Conversion factors can be generated from equivalence statements (e.g. 1 inch = 2.54 cm)
Arrange conversion factors so the starting unit is on the bottom of the first conversion factor
Conceptual Plan
given unit ? related unit
given unit = desired unit given unit ? related unit?desired unit
given unit related unit = desired unit
Systematic Approach to Problem Solving
Convert 5.70 L to cubic inches
Sort Information Given: 5.70
Desired: in.3
Strategize Conceptual
Plan L mL cm3 in3
Relationships: 1 mL = 1 cm3, 1 mL = 10-3 L
1 in. = 2.54 cm.
Follow the conceptual plan 1 mL 1 cm3 1 in. 3
to solve the problem Solution: 5.70 L ? 10-3 L ? 1 mL ? 2.54 cm 3 = 347.835 in.3
Sig. figs. and round Round 347.835 in.3 = 348 in.3 (3 sig. fig.)
Check units are correct; number makes sense: in.3

Are G and ML the same?No, They are two different things. 1 ml (millilitre) is a “volume”, it measures how much three-dimensional space an object occupies. 1g (gram) is a “mass”, it measures how much material an object contains. Somethings are more “dense”, meaning that the same amount of material occupies a smaller space - think of the metal Pb.