Chemistry, 19.10.2019 07:30 alimarie9714
If a satellite or spaceship explodes in outer space, you can see the explosion from a distance but you cannot hear it. why?
a. light waves travel very fast and sound waves travel much slower.
b. sound waves transmit energy while light does not transmit energy.
c. sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave.
d. light is a mechanical wave and needs a medium to travel through while sound is an electromagnetic wave.
Answers: 2
Chemistry, 22.06.2019 13:00
12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer
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Chemistry, 23.06.2019 11:00
Which of the following reactions is endothermic? h2(g) + ½ o2(g) h2o(g), h = -57.82 kcal ½n2(g) + o2(g) + 8.1 kcal no2(g) ½ n2(g) + 3/2 h2(g) nh3(g) + 11.0 kcal c(diamond) + o2(g) co2, h = -94.50 kcal
Answers: 2
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