A first order reaction is 25% completed in 1h minutes. Calculate the time required for its 50% completion.

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

The ph is the a.independent variable b.the dependent variable c.control group

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward