The Mass of a Sample Is 550 Milligrams

question 70

Multiple Choice

The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?

• A) 5.5 × 10⁸ kg
• B) 5.5 × 10⁵ kg
• C) 5.5 × 10^-4 kg
• D) 5.5 × 10^-6 kg
• E) 5.5 × 10^-1 kg

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Definitions:

Amylase

An enzyme, found chiefly in saliva and pancreatic fluid, that converts starch and glycogen into simple sugars.

Elastase

An enzyme that breaks down elastin, an important protein in connective tissue which provides elasticity.

Enzymatic Reaction

A chemical process catalyzed by enzymes, speeding up reactions in the cells.

Reactants

Reactants are substances initially present in a chemical reaction that are consumed during the reaction to form products.