. Sildenafil is a drug that is removed from the body in a process that follows first order kinetics with k = 0.20 hr-1 . How long does it take for the level of Sildenafil in the blood to fall to 10% of the original concentration?

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Name the intersection of plane bpq and plane cpq.