객관식
Iron crystallizes with a body-centered cubic unit cell. The radius of an iron atom is 126 pm. Calculate the density of solid crystalline iron in grams per cubic centimeter.
497
views
1. Intro to General Chemistry
Density of Geometric Objects
Multiple Choice
A table tennis ball has a diameter of 4.0 cm. What is its volume in cm^3? (Assume the ball is a perfect sphere.)
A
33.5 cm^3
B
50.3 cm^3
C
16.8 cm^3
D
25.1 cm^3
검증된 단계별 안내1
Identify the shape of the object: The table tennis ball is a perfect sphere.
Recall the formula for the volume of a sphere: \(V = \frac{4}{3} \pi r^{3}\), where \(r\) is the radius of the sphere.
Calculate the radius of the ball by dividing the diameter by 2: \(r = \frac{4.0\ \text{cm}}{2} = 2.0\ \text{cm}\).
Substitute the radius value into the volume formula: \(V = \frac{4}{3} \pi (2.0)^{3}\).
Simplify the expression by calculating the cube of the radius and then multiply by \(\frac{4}{3} \pi\) to find the volume in cm\(^{3}\).
Related Videos
Related Practice
