In a titration of HCl with NaOH, 50.0 mL of the base were required to neutralize 100.0 mL of 5.0 M HCl. What is the molarity of the NaOH?

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

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?