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What is a pure substance that cannot be separated into simpler substances by physical and chemical means?
element
Is every complex number a pure imaginary number?
No. For example the number 1+i. Pure imaginary complex numbers are of the form 0 + a*i, where a is a non-zero real number.
What are one example perpetual resoruces?
Water. Not clean or pure or fresh water, but ALL water.
How many grams are equal to quart?
If, and only if, the substance is pure water, then 1Imperial Quart = 2Pint = 2x568 ml 1USAPint = 473 ml and these ml of volume are exactly a gram each in weight if it is pure water. Answer :- call the millilitres grams Grams are a measure of weight while quart measures volume. The two are not comparable unless, as pointed out in the answer above, you are dealing with a specific substance.
Example of quantitative observation?
An example of a quantitative observation is measuring the temperature of a substance using a thermometer and finding it to be 25 degrees Celsius.
