Chemistry, 18.09.2019 22:20 bobelliot67789
Achemistry student at a yard sale considers buying a silver coin. the student asks permission to test the coin to determine whether it is pure silver. they find that the coin has a mass of 15.79g. submerging the coin in 12.3ml of water, they find that the new volume is 13.8ml. based on this data and the fact that density of silver is 10.50g/ml, is the coin pure silver? explain your reasoning.
Answers: 1
Chemistry, 22.06.2019 12:00
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Chemistry, 22.06.2019 21:20
Juju.01) 5 geologic events a group of students designed an experiment in an ice rink to represent the solar system. the steps of the experiment are listed below. 5: geologic events 1. choose a student to represent the sun. the planets are represented by two tennis balls. 2. ask the student to hold the tennis balls in each palm and spin on the ice with arms stretched out. 3. ask the student to draw in the arms after about 10 spins. 4. observe the student's arms rotate faster when they are closer to the body. 05 geologic events enors) the experiment most likely demonstrates that (2 points) 07 discussion-based sessment/module planets exert gravitational force on the sun the sun exerts gravitational force on the planets 3.07 discussion-based ssessment speed of a planet depends on its distance from the sun new version available! (3.0.119) get it now submit 18.07: module exam description
Answers: 3
Chemistry, 23.06.2019 00:30
Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms
Answers: 1
Chemistry, 23.06.2019 05:40
Which order shows the levels of organization from largest to smallest? organism, organ system, cell, organ, tissue organism, tissue, organ system, organ, cell organism, organ, organ system, cell, tissue organism, organ system, organ, tissue, cell
Answers: 2
Achemistry student at a yard sale considers buying a silver coin. the student asks permission to tes...
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