C125 - Study guides, Class notes & Summaries

independent variable - Answer- the quantity you vary or control; it is assigned to the abscissa (x-axis) dependent variable - Answer- the quantity you measure in the lab; it is assigned to the ordinate (y-axis) ordinate - Answer- y-axis abscissa - Answer- x-axis slope - Answer- change in y/change in x best-fit line equations - Answer- y=mx+b *m is the slope; b is the y-intercept interpolated results - Answer- lie within the range of measured data extrapolated results - Answe...

Rearrange the following equation to solve for V. (P+a)(V-b)=nRT - Answer- V= (nRT/P+a) +b In an experiemnt, the best-fit-line equation between Absorbance (A, unitless) and concentration (c, mg/mL) is used to calculate the concentration of Fe. Based on the best-fit line equation given below, what is the concentration of Fe if the absorbance is 1.25? A = 851 c + 0.03 - Answer- 0.0014 In y=kx + b, b is - Answer- y-intercept All of the following numbers have three sig figs EXCEPT: 1...

Pearson Edexcel GCSE In History (1HI0) Paper 1: Thematic study and historic environment (1HI0/11) Option 11: Medicine in Britain, c1250–present and The British sector of the Western Front, 1914– 18: injuries, treatment and the trenches Mark Scheme (Results) Summer 2024

What is the slope if A is plotted on y-axis and B is plotted on x-axis? 5A + 3B = 8 - Answer- -3/5 Masses (in g) and volumes (in mL) of different amount of an unknown liquid were plotted in Excel and a best-fit-line equation was obtained. What is the unit of the slope for the best-fit-line equation? - Answer- g/mL R square value - Answer- quantity that describes how good experimental data fits into a straight line How many significant figures should the result of the following calcul...

Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 11: Medicine in Britain, c1250–present and The British sector of the Western Front, 1914–18: injuries, treatment and the trenches QP 2023

Rearrange the Following equation to solve for C: A = - B/C + D - Answer- C = B / D - A What is the y-intercept if B is plotted on y-axis and A is plotted on x-axis? 5(A + 12) + 3B = 0 - Answer- -20 In y=kx + b, x is - Answer- independent variable Masses (in g) and volumes (in mL) of different amounts of unknown liquid were plotted in Excel. What is the physical meaning of the slope of the obtained best-fit-line equation? - Answer- Density Which one is not rounded correctly whe...

Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 12: Warfare and British society, c1250–present and London and the Second World War, 1939–45 Question Paper 2023

accuracy - Answer- how close a measured value is to an accepted value Precision - Answer- The degree to which repeated measurements show the same result. precision describes - Answer- random errors and statistical probability measurement of accuracy - Answer- percent error Border Ligand (weak) - Answer- H2O I - Answer- weak ligand Br - Answer- weak ligand cl - Answer- weak ligand CO2 - Answer- weak ligand F - Answer- weak ligand CS - Answer- strong ligand NH4 - A...

Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 12: Warfare and British society, c1250–present and London and the Second World War, 1939–45 Question Paper 2023

Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 11: Medicine in Britain, c1250–present and The British sector of the Western Front, 1914–18: injuries, treatment and the trenches QP 2023