Multiple Choice
Which of the following best describes viscosity, and under which conditions does magma exhibit high viscosity?
80
views
1. Intro to General Chemistry
Chemical Properties
Multiple Choice
Nickel and gold combine to make white gold. Which best describes white gold?
A
White gold is a mixture in which gold and nickel retain their individual properties and can be easily separated.
B
White gold is a pure element with a silvery appearance.
C
White gold is a homogeneous alloy of gold and nickel.
D
White gold is a compound formed by a chemical reaction between gold and nickel.
Verified step by step guidance1
Understand the difference between mixtures, compounds, elements, and alloys: Elements are pure substances consisting of one type of atom; compounds are substances formed by chemical reactions with fixed ratios and new properties; mixtures are physical combinations where components retain their properties; alloys are homogeneous mixtures of metals.
Identify that white gold is made by combining gold and nickel, both metals, which suggests it is not a pure element or a compound formed by chemical bonding but rather a mixture of metals.
Recognize that alloys are homogeneous mixtures of metals where the metals are mixed at the atomic level, resulting in a uniform appearance and properties different from the individual metals but without chemical bonding forming a new compound.
Conclude that white gold is best described as a homogeneous alloy of gold and nickel because it combines the metals uniformly and exhibits properties distinct from pure gold or nickel alone.
Eliminate other options: it is not a pure element (gold alone), not a compound (no chemical reaction forming new substances), and not a simple mixture where metals retain individual properties and can be easily separated.
Related Videos
Related Practice
