Chemistry, 10.11.2020 16:20 kristy2958
If one assumes that a penny is a simple cylinder with a diameter of 19.0 mm and a height of 1.5 mm, what is the approximate thickness of copper on the penny (the density of copper is 8.93 g/mL):
Answers: 3
Chemistry, 22.06.2019 04:50
Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?
Answers: 1
Chemistry, 22.06.2019 18:00
Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?
Answers: 2
Chemistry, 22.06.2019 22:00
4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.
Answers: 2
Chemistry, 22.06.2019 22:30
Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.
Answers: 1
If one assumes that a penny is a simple cylinder with a diameter of 19.0 mm and a height of 1.5 mm,...
Mathematics, 18.10.2020 15:01
English, 18.10.2020 15:01
Mathematics, 18.10.2020 15:01
Mathematics, 18.10.2020 15:01
Mathematics, 18.10.2020 15:01
Arts, 18.10.2020 15:01
English, 18.10.2020 15:01
Chemistry, 18.10.2020 15:01
History, 18.10.2020 15:01
English, 18.10.2020 15:01
Geography, 18.10.2020 15:01
English, 18.10.2020 15:01
Computers and Technology, 18.10.2020 15:01