Aqa As Level Chemistry Paper 1 Verified Questions And Answers

AQA AS Level Chemistry Paper 1Define Relative Atomic Mass (Ar) [1]>>> the average mass of an element÷ 1/12th the mass of a C12 atomDefine Relative Molecular/Formula Mass (Mr) [1]>>> Average mass of one molecule ÷ 1/12th the mass of a C12 atomWhat is meant by the Avogadro constant? [1]>>> The number of atoms in 12g of carbon.Give the formula for moles. [1]>>> moles= mass÷MrGive the formula for concentration in mol/dm³ [1]>>> concentration = moles÷volumeState the Ideal Gas Equation, what each symbol represents and the units for each symbol. [9]>>> PV= nRTwhere... P= Pressure measured in PaV= Volume measured in m³ n= number of molesR= The molar gas constant- 8.31JK^-1mol^-1T= Temperatures measured in KDefine Empirical Formula [1]>>> The simplest whole-number ratio of atoms of each element in a compound.Define Molecular Formula [1]>>> The actual number of atoms of each element in a compound.What are the four state symbols? [4]>>> Solid (s), liquid (l), gas (g), aqueous solution (aq)Describe how to perform a titration. [5]>>> 1. Fill a burette with the acid of known concentration,2. Accurately measure 25cm³ of the alkali solution using a pipette and transfer it to a conical flask.3. Add a few drops of a