Exam 1: Matter, measurements, and Calculations

The average gestation period (length of a pregnancy)for humans is 40 weeks.If a child if born after just 36 weeks,what was the percentage of this gestation period compared to the normal length?

A particular medication is a heterogeneous mixture.Since heterogeneous mixtures are consistent throughout,this medication does not need to be shaken.

If a 200 gram sample of water is partially frozen forming 40 g of ice,than 80% of the original sample is still a liquid.

A patient weights 220 lbs.A medication for this patient is supposed to be taken 3 mg per kg per day.The correct dose for this patient is 3000 mg per day.

The yard is considered a derived SI unit.

One can always rely on the health information found on the world wide web.

Convert 30.0 ^$\circ$ C to Fahrenheit.

The prefix centi- denotes what fraction of a basic unit?

A monoatomic molecule cannot be reduced to a simplier chemical.

Which of the following represents a physical change in matter?

As two clear liquid solutions are thoroughly mixed,a red solid forms.This change is most likely _____ .

Knowing that 1 g = 0.035 oz and 16 ounces = 1 lb,calculate the number of grams in 10 pounds.