a woman who weighs 150 lb. on earth would weigh 340 lb. on another planet, what is her mass on earth, what is her mass on the other planet, what is the magnitude of the gravitational field on the other planet

Answer 1

Mass does not change with g, weight does.

You seem to be using feet/pounds units so
g = 32 ft/s^2 approx on earth

Mass = 150 /32 slugs

g other = 32 * (34/15)