Science - Topic One (1) Chemistry - Making Better Boats, Sankey Diagram and Fractional Distilation. Moonbeam published on September 22, 20132 responses 0 5.0★ / 5 Questions in vertical order What is a independent variable? The thing that stays the same the thing you choose to change the thing you measure What is the reaction equation for hydrogen combustion? 2H'2' + O'2' = 2H'2'O H'2' + O'2' = H'2'O H'2' + O'2' =H'2'O'2' What are the elements to the fire triangle? Heat, fuel and oxygen fuel, oxygen and water CO2, fuel and water What is a Dependent Variable? The Thing you measure. The thing that stays the same. The thing you choose to change. something in a experiment What is the first stage to Fractional Distillation? Select the two correct answers The Hydrocarbons with the lowest boiling point are removed first at the top because it is cooler there. Heat up the oil. The Hydrocarbons with the highest boiling point are removed next at the bottom because it is hotter there. Heat up the crude oil. What elements are in sulfur dioxide? Sulfur and oxygen sulfur and hydrogen hydrogen and oxygen What is the third stage to fractional disilliation? heat up the oil the hydrocarbons with the lowest boiling point are removed at the top because it is cooler there. the hydrocarbons with the highest boiling point are removed at the bottom because it is hotter there. What is corrosion? Select the two correct answers When a metal reacts to water, salts or oxygen. When a substance oxide. when a metal rusts when a substance reacts to salts, oxygen and water causing it to rust What is a controlled variable? Type answer (30 letters) What is a sacrificial coating? a layer over an easily corroded substance protection from bad weather paint what is the chemical formula for sulfur dioxide? SO'2' S'2'O'2' S'2'H'2'O'2' What is the chemical equation to rust? FeO H2O CO2 What is density? massvolume volumemass Volume/mass What is the second stage to fractional distillation? Heat up the oil The hydrocarbons with the highest boiling point are removed at the bottom because it is hotter there. The hydrocarbons with the lowest boiling point are removed at the top because it is cooler there. What is the reason to why we smell things? DIFFUSION the smell receptors in our noses we have a nose.