Question

a ring was purchased from the pawn shop. the owner wants to determine if the ring is pure gold or not. they research physical and chemical properties of gold. this is what they found: physical and chemical properties of gold density - 19.3g/cm3 melting point - 1,064.18oc malleable yellow shiny using the physical and chemical properties of gold, what is the best way to determine if the ring is pure or not? a ask 20 people what color they think the ring is and use the survey results to determine if the ring is yellow. b calculate the density of the ring by measuring the mass and volume. c place the ring in the hot sun for 24 hours and see if it melts and turns to liquid gold. d squeeze the ring between their fingers to see if it bends.

Explanation:

Density is a characteristic physical property of a substance and is unique for pure gold. Measuring mass and volume to calculate density can accurately determine if the ring is pure gold. Color perception can vary among people (option A is unreliable), the temperature of the hot - sun is not high enough to reach gold's melting point (option C won't work), and just squeezing to check malleability is not a precise method for determining purity.

Answer:

B. Calculate the density of the ring by measuring the mass and volume.