Chemistry, 16.10.2020 15:01 faithtunison
14. A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black substance that makes up the tarnish on the surface of silver objects. To remove the tarnish from the ring, students placed it in a pan lined with aluminum foil and added hot water. Baking soda was added to the hot water and stirred. Students made observations about the process. Which observation of this process provides evidence of a chemical reaction?
a. hot water heater the aluminum foil
b. the liquid solution changed color
c. hot water cooled
d. the pan was lined with aluminum foil
I need this ASAP I'm in a test
Answers: 1
Chemistry, 22.06.2019 09:00
If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?
Answers: 1
Chemistry, 22.06.2019 15:30
Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.
Answers: 2
Chemistry, 22.06.2019 18:30
The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of
Answers: 2
14. A silver ring reacts with compounds containing sulfur in the air to form silver sulfide, a black...
Mathematics, 22.12.2019 14:31
Mathematics, 22.12.2019 14:31
History, 22.12.2019 14:31
History, 22.12.2019 14:31
Chemistry, 22.12.2019 14:31
Social Studies, 22.12.2019 14:31
Physics, 22.12.2019 14:31
Computers and Technology, 22.12.2019 14:31