Identify each of the following as an element, homogeneous mixture, heterogeneous mixture, compund, physical change, chemical property, physical property, or chemical change. sodium nitrite preservative mercury in thermometer copper and rust burning a log of wood jet fuel melting copper chewing on a piece of bread ibuprofen the process of sweating cookies and cream ice cream platinum ring propane graphite (a form carbon) density

A piece of metal with a mass of 114 g was placed into a graduated cylinder that contained 25.00 mL of water, raising the water level to 42.50 mL. What is the density of the metal? 7.25 g/cm³ 2.68 g/cm³ • 6.51 g/cm³ Which of the following is an example of a heterogeneous mixture? • iron • tin can 0.154 g/cm³ 0.592 g/cm³ brass gravel uranium How many cubic centimeters of ore containing 0.22% by mass gold must be processed to obtain $100 worth of gold? The density of the ore is 8.0 g/cm³ and the price of gold is $418 per troy ounce. (14.6 troy oz = 1.0 ordinary pound, called an avoirdupois pound; 1 lb = 454 g) 9.3 x 10¹ cm3³ • 4.2 x 10² cm³ • 6 200 cm³ 42 cm³ • 2.7 x 104 cm³

Determine whether each change is physical or chemical.

Be sure to report answers with the correct number of significant figures.   Length:3.55 cmWidth:2.55 cmMass:0.338 g     Volume of aluminum foil (cm3):0.124 cm3     Thickness of aluminum foil (cm):

Which of the following is a chemical property and NOT a physical property?    Group of answer choices   Surface Tension Density Flammability Malleability Color

If a sample of gold alloy has a mass of 87.7 g and is 78.3% gold by mass, what percentage of the alloy is made up of other metals? Write your answer to the nearest tenth of a percent. (I had to alter the wording of this question since it wasn't calculating significant figures properly, so if you got it wrong because of significant figures you can assume you probably actually got it correct.)