A randomly selected group of individuals were asked how many marbles they believed were contained in a sealed jar. The following frequency distribution summarizes the results. a) Complete the table by determining the midpoints, relative frequencies, and cumulative frequencies.  Marbles Frequency Midpoints  Relative Frequency Cumulative Frequency 220 – 232 6 233 – 245 7 246 – 258 10 259 – 271 5 272 – 284 11 b) Find the mean of the frequency distribution. c) Draw a histogram of the frequency distribution. 

List the number of atoms for the following formula. NaNO3   Give your answer in the following format – for example if the formula is  MgCl2     –  answer like this   1Mg 2Cl  

               2Al   +   Fe2O3   ——>  Al2O3  +  2Fe Use the chemical equation above to calculate the number of grams of  Al2O3  produced from 2.25 mol of Al.   You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be just g.

Balance the following chemical equation. Na   +  Al(NO3)3  ——> NaNO3   +  Al   Give your answer in the following format – for example if the answer to a balanced equation is  C3H8   + 5O2 —–> 3CO2  + 4H2O  –  then answer like this:       5O2  3CO2  3CO2  4H2O  I don’t need you to write down the compounds that do not have a number in front of them.

               C3H8   + 5O2 —–> 3CO2  + 4H2O Use the chemical equation above to calculate the number of grams of CO2 that will react with 3.0 mol of O2.   You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be just g.

Calculate the molar mass of potassium chloride, KCl. You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be  g/mol.

Calculate the molar mass of sodium bromide, NaBr. You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be  g/mol.

Calculate the number of moles of sodium in 225.0 g of sodium, Na? You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be just mol.  

                    C3H8   + 5O2 —–> 3CO2  + 4H2O Use the chemical equation above to calculate moles of H2O that would react with 2.0 mol O2.   You only need to put in the answer – I do not need to see your calculations that you did to get the answer. Also be sure to add the units to your answer – which on this problem will be just mol.

According to John Underhill’s Newes from America (1638), what complaint did the English colonists’ Native allies level against them during their collective war with the Pequot tribe in 1637?