One Mole of a Substance Contains 6

question 67

Multiple Choice

One mole of a substance contains 6.02 x 10²³ molecules.The atomic number of Li is 3 and the atomic mass is approximately 7.If you have three moles of Li,how many grams does it weigh?

• A)9
• B)21
• C)7 x 6.02 x 10²³
• D)3 x 6.02 x 10²³

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Definitions:

Vertices

The corner points where two or more edges meet in a geometric shape or figure; singular form is "vertex."

Ellipse

A plane curve encircling two centers where the total distance from any point on the curve to the two centers remains unchanged.

Center

The midpoint or central point of a geometric shape, or a point that is equidistant from all points on the circumference of a circle or sphere.

Hyperbola

A type of smooth curve lying in a plane, defined as the locus of all points that satisfy the equation of the difference of distances from two fixed points (the foci) being constant.