Solved

The Natural Abundance of Calcium in the Earth's Crust Is

Question 78

Multiple Choice

The natural abundance of calcium in the earth's crust is 3.4% by mass.How many calcium atoms are present in a 1.50 g sample of the earth's crust?

A) 6.6 × 10²³atoms
B) 3.1 × 10²²atoms
C) 7.7 × 10²⁰atoms
D) 7.7 × 10²²atoms
E) 5.1 × 10²⁰atoms

Related Questions

Q73: Lead has 4 stable isotopes with masses

Q74: What is the isotopic atomic mass of

Q75: J.J.Thomson suggested the "plum pudding" model of

Q76: The total numbers of neutrons,protons,and electrons in

Q77: A certain mass of nickel reacts with

Q79: A solution contains 12.5% NaCl by mass.What

Q80: Isotopes have different atomic number (Z)but the

Q81: The atomic mass interval for carbon is

Q82: What is the average mass in kilograms

Q83: Calculate the percent abundance of the two