How many grams of water (h2o) are produced if i burn 4 moles of octane (c8h18) in excess oxygen? 2c8h18 + 25o2  16co2 + 18h2o

25.7 mol

From the balanced reaction, 2 mol of Octane produces 18 mol of Water.

Find the moles of Octane you are reacting.

moles of Octane = mass of Octane/ molar mass = 325g/ 114.23 g/mol = 2.85 mol.

Since Oxygen is in excess, limiting reagent is Octane.

2 mol Octane produces 18 mol Water.

1mol Octane produces 9 mol Water.

Therefore, 2.85 mol Octane will produce Water = 2.85 mol Octane x 9 mol Water/ 1mol Octane

= 25.7 mol

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.