1.9 2.
Hydrocarbons are compounds consisting of carbon and hydrogen atoms only.
Calculate a) the empirical formula and b) the molecular formula of a hydrocarbon with
a relative molecular mass of 30, and which contains 80% carbon.

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.