Please answer the questions below to three significant figures.
a) What mass of KCl is
required to make 44.0 mL of
a 0.270 M KCl solution?
.......... g KCl
b) How many moles of potassium
ions are present in the solution?
........ mol
please rate
Please answer the questions below to three significant figures. a) What mass of KCl is required...
Please answer the questions below to three significant figures. a) What mass of KCI is required to make 48.0 mL of a 0.140 M KCl solution? g KCI b) How many moles of potassium ions are present in the solution? mol
Please answer the questions below to three significant figures. a) What mass of KCl is required to make 59.0 mL of a 0.260 M KCl solution? 1 g KCl b) How many moles of chloride ions are present in the solution?
Please answer the questions below to three significant figures. a) What mass of KCI is required to make 47.0 mL of a 0.280 M KCl solution? 9 кСІ b) How many moles of potassium ions are present in the solution? mol
DATA TO BE USED Please use the data provided below to complete this assignment. Refer to Expt. 7 in the laboratory manual for an explanation of the data. o Mass used to prepare 5.0 g/L sodium sulfate solution: 0.494 g o Mass used to prepare 0.025 M sodium sulfate solution: 0.351 g o Mass used to prepare 2.0 mM sodium sulfate solution: 0.025 g o Conductivity (in uS/cm) for 5.0 g/L and 0.025 M and 2.0 mM sodium sulfate solutions...
What is the mass, in grams, of 1.50 mol of iron (III) sulfate? Express your answer using three significant figures. How many moles of ammonium ions are in 6.935 g of ammonium carbonate? Express your answer using four significant figures. What is the mass, in grams, of 1.40 times 10^21 molecules of aspirin, C_9H_8O_4? Express your answer using three significant figures.
please answer all, and type please Problems and questions (show all calculations, correct significant figures and units) 1. Why is it important to test the crucible for cracks before heating it? 2. Write the correct balanced equation for the dehydration (removal of water) of the magnesium sulfate hydrate obtained in Procedure B of this experiment. 3. How many moles are in 70.0 grams of potassium hydroxide? 4. A compound is formed when 0.300 moles of barium combine with 0.600 moles...
A concentrated solution of potassium chloride contains 15% KCl (MW = 74.5 g/mol). How many milliequivalents of potassium are present in a 200 mL bottle? Assume that complete disassociation of KCl occurs. How is this worked? Answer is 403
Express your answer to three significant figures and include the appropriate units, The formula of Benadryl is C17H21NO. How many moles of C are present in 0.752 moles of Benadryl? How many moles of H are present in 2.20 moles of Benadryl? How many moles of N are present in 1.64 moles of Benadryl?
1. Part of a buret measuring in mL is shown below. Read the volume to the proper number of significant digits. Volume mL 2. Suppose it takes 33.69 mL of 0.005123 M EDTA to titrate 25.00 mL of a hard water solution. a) How many moles of EDTA were required to titrate to the endpoint? b) How many moles of hard water ions, expressed as moles of Ca²+, are present in the hard water solution? c) What is the concentration,...
What mass of potassium nitrate (M = 101.1 g//mol) is required to prepare 300 mL of 0.1 M solution? b) What will be the concentration of potassium ions if extra 10 g of potassium sulfate (M = 174.3 g/mol) are added? Assume that the volume of the salt is negligible.