Asolid piece of aluminum (51.0 g) was added to a solution of sodium hydroxide (84.1 g) in water, a balanced equation for this reaction is shown below:
2 naoh(aq)+ 2 al(s)+ 2 h2o → 2 naalo2(aq)+ 3 h2(g)
(a) which reagent is completely consumed by the reaction?
(b) after the reaction is completed, what is the mass of the reagent that remains? (c) what mass of hydrogen gas is produced?

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?