Calcium reacts with water as shown. Ca(s) + 2H20(l) - Ca(OH)2(aq) + H2(g)
What is the total mass of the solution that remaining when 40 g of calcium reacts with 100 g of water?
(A) 58 g
(B) 74 g
(C) 138 g
(D) 140 g

When the following equation is balanced using the smallest possible integers, what is the coefficent of oxygen gas? c7h16o(g) + o2(g) → co2(g) + h2o(g) -1 -5 -8 -16 -21

What layer of the atmosphere is directly above the troposphere?

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?