For parts of the free response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate.   Answer the following questions related to the analysis of CaBr2CaBr2. (a) A student has a 10.0g10.0g sample of CaBr2CaBr2. Show the setup of the calculation to determine the number of moles of CaBr2CaBr2 in the sample. Include units in the setup. (You do not need to do any calculations.)

A chemist prepares a solution of barium acetate (Ba(CH,CO2),) by measuring out 1.3 x 10² µumol of barium acetate into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's barium acetate solution, Be sure your answer has the correct number of significant digits. mmol

One method of analyzing amino acids is the van Slyke method. The characteristic amino groups (−NH2) in protein material are allowed to react with nitrous acid, HNO2, to form N2 gas. From the volume of the gas, theamount of amino acid can be determined. A 0.0604-g sample of a biological sample containing glycine, CH2(NH2)COOH, was analyzed by the van Slyke method and yielded 3.70 mL of N2 collected over water at a pressure of 735 torr and 29 °C. What was the percentage of glycine in the sample?CH2(NH2)CO2 H+HNO2 ⟶CH2 (OH)CO2 H+H2O+N2

From the standardization data, calculate the molarity of the sodium hydroxide solution for each trial. Average the values and enter the average in the Standardization Data Table.

- Part C Write a balanced ionic equation for this acid-base reaction: Ca(OH)2 (aq) + 2CH3CO₂H(aq) → Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ A chemical reaction does not occur for this question. Submit Request Answer Part D ? Write net ionic equation for this acid-base reaction: Ca(OH)2 (aq) + 2CH3CO₂H(aq) → Express your answer as a chemical equation. Identify all of the phases in your answer.

N2CO3(aq) + CaCl2(aq)  converts to 2NaCl(aq) + CaCo3(s) Order the steps required to predict the volume (in mL) of 0.0100 M calcium chloride needed to produce 1.00 g calcium carbonate. There is an excess of sodium carbonate. Here are the steps, in the wrong order. Please put them in the right order. 1. Compute the volume of calcium chloride solution required. 2. Convert mass of calcium carbonate to moles of calcium carbonate. 3. Compare the moles of calcium carbonate to moles of calcium chloride based on balanced equation to calculate moles of calcium chloride required. 4. Convert the volume of calcium chloride solution required from liters to millileters.

How could you distinguish solution of sodium chloride (table salt) from a solution of sodium iodide (a poison) using an AgNO3 solution?  Show reactions. Express your answers as balanced chemical equations. Identify all of the phases in your answer. Seperate the two equations by a comma.   hint: Begin each with AgNO3(aq) and add to it either NaCl(aq) or NaI(aq)

On their third titration trial, the CHM 111 student used 18.80 mL of 0.205 M NaOH(aq) to neutralize 25.0 mL of HCl(aq). Calculate the molar concentration of the HCl solution to the correct number of significant figures.

Balance CaCL2(aq) + Na3PO4(aq) —> Ca3(PO4)2(s)+ NaCL(aq). Identify single displacement /combination/ decomposition/double displacements

You dilute the river water 10 times for the analysis of SDS concentration. The instrument measures an average molar concentration of SDS in the diluted river water to be 1.689 10-4 mol/L. The molar mass of SDS is 288.4 g/mol. What is the mass concentration of SDS in the original river water? 4.87 10-1 g/L 4.87 102 g/L 5.86 106 g/L 5.86 10-5 g/L