QUESTION 19 What is the mass percent of sodium, Na, in Na2O7 Report your answer to...
Show your work on a separate sheet of paper to be submitted at the end of the exam! What is the wavelength of radiation (in m) that has an energy of 3.371x10-19J per photon? Do not include units on your answer Report your answer to 1 significant figure If you need to use scientific notation, use the following format: ex, 6.02x1023 would be 6.02E23
Be sure to answer all parts. Be sure to report your answer to the correct number of significant figures. Calculate AG and Kp for the following processes at 25°C: (a) H2(g) + Br2(1) 211B10 0 AG- k.I/mol x 10 (Enter your answer in scientific notation.) (b) , H2(g) + , Br2() HBr(g) 0 AG k.J/mol Кр Enter your answer in scientific notation.) × 10
How many moles of fluorine atoms are there in (3.20x1042) grams of SF4? Give your answer in scientific notation with 3 significant figures. Do not put your answer. Remember, in scientific notation you must include an exponent, even if that exponent is zero. any units in Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
Determine the number of oxygen atoms in 2.54 moles of Al2(SO4)3. Report your answer using three significant figures. When using scientific notation, use the following format: 3.25e19
QUESTION 15 How many moles of solute are in 544mL of 4M HNO3? • Answer to 3 decimal places • Read about significant figures and rounding in the Helpful Resources page! • Do not include units when reporting your answer • Use standard notation or scientific notation as accepted by blackboard . e.g. 0.001 or 1E-3, not 1 x 10^-3 QUESTION 16 Suppose you need 0.13L of a 0.42M solution of NiCl2, but all you have is a solution that...
Helps 2 attempts left Check my work Be sure to answer all parts. Enter your answers in scientific notation. How many carbon atoms are contained in each of the following number of moles: (a) 3.50 mol; (b) 4.70 mol? Report answer using three significant figures. al atoms * 10 * 10 (6) atoms
What is the equilibrium constant, Keq, for the reaction listed below at 416 K. Report your answer with three (3) significant figures. You may use scientific notation in your answer, but be sure you use the correct format. PCl5(g) ⇌ PCl3(g) + Cl2(g)
Calculations You must show your work, report your answer in using the correct scientific notation, and use the appropriate number of significant figures. 11. (6 pts.) Perform the following conversions: a. 6.52 grams (g) of CH4 to moles of CHA: b. 2.56 mole of CH4 to molecules of CHA: c. 3.65 x 1022 molecules of CH4 to grams (g) of CHA
Question 3 1 pts A gas tank with a volume of 22.1 L contains 4.1 moles of an ideal gas. The initial pressure of the gas is 7.5x10° Pa. The gas is compressed to half its original volume while the pressure stays constant. What is the final temperature of the gas in K? (Note: 1 mº = 1000 L) [Note: if you need to enter a number in scientific notation, use 'e. For example, 1200 = 1.2e3 and 0.0012 =...
3 atempi 3 attempts left Check my work Be sure to answer all parts. Please report your answer to the correct number of significant figures. Determine the Ky of a weak base if a 0.613 M aqueous solution of the base at 25°C has a pH of 10.88. | x 10 (Enter your answer in scientific notation.)