Chemistry 0.0 / 5 ? ChemistryC3GCSEOCR Created by: EmilyjaneeCreated on: 26-04-16 17:47 What is exothermic? It is when heat is given out. 1 of 10 What is endothermic? It is when heat is taken in 2 of 10 What is the equation for percentage yield? Actual yield(grams) / predicted yield(gram) X 100 3 of 10 How many covalent bonds does a diamond have? It has four covalent bonds 4 of 10 How many covalent bonds does a graphite have? It has three covalent bonds 5 of 10 Why does graphite conduct electricity? Because it has free flowing electrons as there is only three covalent bonds 6 of 10 Why is a diamond good cutting tool? Because of its structure, it is very hard 7 of 10 Do giant molecular structures have low or high melting points? High melting points 8 of 10 What is the equation for atom economy? Total mass of desired products / total mass of all products X 100 9 of 10 Does mor collisions increase or decrease the rate of reaction It increases the rate of reaction 10 of 10
Comments
No comments have yet been made