In the presence of hydrogen sulfide, silver oxidizes to form silver sulfide (silver tarnish). It forms a black film on the surface of silver. 4Ag+2H2S+O2→2Ag2S+2H2O One way to reverse the chemical reaction and turn silver sulfide back into silver is by immersing the silver in an aluminum container filled with a hot solution of sodium bicarbonate. Metals like aluminum have a greater affinity for sulfur than silver. This tarnish-removal method uses a chemical reaction to convert the silver sulfide back into silver, resulting in no net loss of silver. The reaction between silver sulfide and aluminum takes place in the presence of a sodium bicarbonate (NaHCO3) solution, resulting in the transfer of sulfur atoms from silver to aluminum, freeing the silver metal and forming aluminum sulfide. The reaction can be summarized as follows: when silver sulfide reacts with aluminum, silver sulfide is reduced to form silver and aluminum is oxidized to form aluminum sulfide. Complete the balanced chemical equation for the reaction, showing the formation of silver metal from silver sulfide in the presence of aluminum metal. Express your answer as the products of a chemical equation.

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

Nan element’s square on the periodic table, the number with the greatest numerical value represents the