There are several ways to model a compound. one type of
model is shown.
what is the chemical formula for the molecule represented
by the model?
a. cно
b. c4h9o2
c. сно
d. c3h2o2

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4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.