A coin contains   grams of nickel and   grams of copper, for a total weight of   grams.

A 50-cent coin is composed of copper and nickel in the ratio of 3:1.A 50-cent coin weighs 15.55 grams.How many grams of copper are in a 50-cent coin?A. 3.8875 gB. 5.183 gC. 7.775 gD. 11.6625 g

Based on the density of your penny, which metal is your penny mostly made of? Prove it using the densities below.Zinc (Zn) = 7.1 g/ml Silver (Ag) = 10.5 g/ml Gold (Au) = 19.3 g/mlCopper (Cu) = 8.9 g/ml Platinum (Pt) = 20.5 g/ml Brass (alloy) = 8.40 g/ml

On placing a copper coin in a test tube containing green ferrous sulphate solution, it willbe observed that the ferrous sulphate solution(a) turns blue, and a grey substance is deposited on the copper coin.(b) turns colourless and a grey substance is deposited on the copper coin.(c) turns colourless and a reddish–brown substance is deposited on the copper coin.(d) remains green with no change in the copper coin.

An ornament weighing 50 g in air weighs only 46 g in water. Assuming that some copper is mixed with gold to prepare the ornament. Find the amount of copper in it. Specific gravity of gold is 20 and that of copper is 10.

At the bank, penny rolls are weighed to determine the amount of money they contain. If 1 penny weighs 2.35 g, how much money is in a pile of rolls weighing 4.72 kg?(Answer to 2 decimals, as in dollars and cents.)