If an atom of nitrogen binds wit three hydrogen atoms to form a molecule of ammonia, how many lone pairs of electrons does nitrogen have? a. one b. three c. four d. five

Which type of basaltic lava flow has a fairly smooth

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

In which of the following is positive work done by a person on a suitcase