Molar mass (g/mol) 180 30 63.54 #of moles 1.805 x 103 0.4827 0.0284 1. Complete the...
D. MORE PRACTICE... 1. Complete the table below. Massm m # moles Substance Mass (g) Molar mass (g/mol) of moles a. Aspirin tablet C.H.O.) 0.325 b. Wooden stick | (CHO) 14.482 c. Copper wire (Cu) Show work below. 1.809 2. A substance has a mass of 90.10 grams and contains 3.02 x 10 molecules. Which of the 3 substances in the chart above is it? Explain. 0 2 3 Fird noo or mores find mm mass per ind look at...
D. MORE PRACTICE... Molar mass (g/mol) of moles 1. Complete the table below. Substance Mass® 2. Aspirin tablet (C4H4O) 0.325 b. Wooden stick LCH:0) 14.482 c. Copper wire (Cu) 1.809 Show work below. 2. A substance has a mass of 90.10 grams and contains 3.02 x 10" molecules. Which of the 3 substances in the chart above is it? Explain. 165 3. Find the % composition of each element in aspirin.
1. Complete the table below. #of moles Substance Mass (g) Molar mass (g/mol) a. Aspirin tablet (CoH&O) b. Wooden stick (CH2O) 0.325 14.482 c. Copper wire (Cu) 1.809 Show work below. a. b. с.
If the molar mass of a substance is 44.01 g/mol, what is the mass of 1.05 x 1024 molecules of the substance? HTML Edita T. x : A 6.25 g sample of magnetite (Fe3O4) contains 4.52 g of Fe. What are the percentages of iron and oxygen in magnetite? HTML Editor Calculate the number of moles of NaHCO3(sodium bicarbonate, or baking soda) in a 5.0 g sample of this substance. A chemical reaction requires 3.50 moles of copper(II) nitrate, Cu(NO3)2....
6. Complete the following table. Molar Mass of Mass of Substance Mass g/mol solute, g water ag Fructose 180 100 g Urea 150 g Lithium fluoride 25.9 2.5 g 164.1 Calcium nitrate 180 g Unknown compound 2.8 g 120 g (nonelectrolyte does not ionize) Expected freezing oint OC 1.32 1.62 -0.44 molality solution 0.14 0.48
12. How many moles of O2 (molar mass -32.00 g/mol) are needed to react completely with 52.0 L of CH4(8) at STP to produce CO2 and H20? (molar mass (CH) 16.04 g/mol) a) 11.6 b) 2.32 c) 4.64 d) 52.0 e) 104
mixed. (1) 9.110.274 moles of a substance weighs 62.5 g. what is the molar mass of the substance, in units of g/mol? (1) 228 g/mol (2) 17.1 g/mol (3) 4.38 x 10 g/mol (4) 62.8 g/mol 10. Identify the correct net ionic equation for the reaction that occurs when solutions of Ba(CIO) and KSOiare (1) Ba?"(aq) + SO2(aq) +BaSO4(s) (2) 2K (aq) + 2CIO (aq) - K(CIO)a(s) (3) Kla) ClOc(aq) - KCIO (S) (4) Bal(aq) + (aq) + SOP(q)- kBaSO4(6)...
The heat of combustion of substance X (molar mass 260 g/mol) is -3196 kJ/mol. How much heat is released in the combustion of 8 g of X? Include the correct sign for heat of combustion with your answer and enter to 2 decimal places.
complete the following table Name molar mass (g/mol) 2-bromoheptane 2-bromohen cacluate from the formula / structure or look up in the table on page 77 density = ? g/ml from PC table 0.22 mL-?g Alkoxide base cacluate from the formula / structure or look up in the table on page 77 heptene isomers cacluate from the formula / structure or look up in the table on page 77 other you calculate you calculate 7.17 target amount target mmoles (1 mmole...
1. A weak monoprotic acid has molar mass 180 g/mol. When 1.00 g of this acid is dissolved in enough water to obtain a 300 mL solution, the pH of the resulting solution is found to be 2.62. What is the value of Ka for this acid? 2. A weak monoprotic acid has pKa = 3.08. Calculate the percent ionization of a 0.35 M solution of this acid. 3. Calculate the pH of a solution that is 0.050 M in CH3COOH...