In the forensic laboratory, a bullet found at a crime scene may be used as evide

Question

In the forensic laboratory, a bullet found at a crime scene may be used as evidence in a trial if the percentage of three metals, usually lead, tin, and antimony, is a match to the composition of metals in a bullet from the suspect's ammunition. If a bullet found at the crime scene contains 8.6-g of lead, 0.1-g of tin, and 0.8-g of antimony, what is the percentage of tin metal in the bullet? Express your answer to the ones place and make sure to include the correct unit symbol with the answer Answer

Explanation / Answer

Total mass = 8.6 g + 0.1 g + 0.8 g
= 9.5 g

mass of tin = 0.1 g

mass % of tin = mass of tin * 100 / total mass
= 0.1 * 100 / 9.5
= 1.1 %

Answer: 1.1 %

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