18) 10 Calcium reacts with water as shown. Ca(s) + 2H20m) + Ca(OH)2(aq) + H2(g)
What is the total mass of the solution that remains when 40 g of calcium
reacts with 100 g of water?
А
58 g
B 749
D 140 g
C 138 g
19) 12 Hydrogen reacts with oxygen as shown in the equation below.
2H2(g) + O2(g) → 2H20)
How much gas will remain if 2 dm of hydrogen are reacted with 1 dm of
oxygen at room temperature?
A 0 dm3
B
1 dm3
C2 dm3
D 3 dm3

b. examine and describe cells

l dont know l am s sorry

the ratio of the conjugate base to the acid required to attain the desired ph.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?