Suppose I have 64.0 g of O2. How many moles of O atoms do I have? A 1 Mole B 2 Moles 3 Moles D 4 Moles Question 5 Avogadro's number is 6.02x1023 atoms per mole. How many atoms of O do I have in 64.0 g of O2?
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- What is the total mass of oxygen in a single molecule of glucose? Express your answer in amu to 5 significant figures. HINT: Make sure your atomic mass for O has a precision of at least 5 sig figs; otherwise, your answe will not be correct. For example, do not use a value of 16 amu per oxygen atom for the atomic mass of O. That has too few sig figs.A solution contains 0.25 M Ni(NO3)2 and 0.25 M Cu(NO3)2. A. Can the metal ions be separated by slowly adding Na2CO3 aq solution? Assume that for successful separation 99% of the metal ion must be precipitated before the other metal ion begins to precipitate, and assume no volume change on addition of Na2CO3 solution. Ksp of CuCO3 = 1.4 x10-10 Ksp of NiCO3 = 1.42X 10-7 B. If you need to redissolve the salt that was first precipitated, what pH will you use and why ? Write your answers in template provided. Upload your step by step solution for A.Sucrose, C 12 H 22 O 11 , is table sugar or cane sugar. It can be decomposed by heat into carbon (a solid black mess) and water vapor. How many grams of carbon would be produced if you decomposed 10.0 g of sucrose? How many atoms of carbon would this be?
- How many oxygen atoms are in this molecular formula? 3H2 OThe enthalpy of combustion of hard coal averages −35 kJ/g, that of gasoline, 1.28 × 105 kJ/gal. How many kilograms of hard coal provide the same amount of heat as is available from 1.0 gallon of gasoline? Assume that thedensity of gasoline is 0.692 g/mL (the same as the density of isooctane).g) HO₂+Cr(OH)4 CrO42 + OH¹- h) Br¹ + SO42 Brz + SO2 (H+) i) FeO + H2O2 Fe³+ + H₂O (basic solution) (acidic solution)
- Given: 2KI +Pb(NO3)2 --> PbI2 + 2KNO3. How many grams of lead (II) iodide are produced if 0.250 moles of potassium iodide react completely? Group of answer choices 0.125 g 0.250 g 57.6 g 115 gThe molecular weight of ethanol (CH3CH2OH) is46 and its density is 0.789 g/cm3.A. What is the molarity of ethanol in beer that is 5%ethanol by volume? [Alcohol content of beer varies fromabout 4% (lite beer) to 8% (stout beer).]B. The legal limit for a driver’s blood alcohol contentvaries, but 80 mg of ethanol per 100 mL of blood (usuallyreferred to as a blood alcohol level of 0.08) is typical. Whatis the molarity of ethanol in a person at this legal limit?C. How many 12-oz (355-mL) bottles of 5% beer coulda 70-kg person drink and remain under the legal limit? A70-kg person contains about 40 liters of water. Ignore themetabolism of ethanol, and assume that the water contentof the person remains constant.Put approx. 10 mL of vinegar (HC2H3O2) in a short glass bottle and add 1 piece of rust-free small iron nail. Write your observation after 24 hours. A. Results and observation: В. С- C. Calculation. Determine how much vinegar (HC2H3O2) in gal. is required to react with an iron nail to produce 32.5 g of hydrogen. The density of HC2H3ot is1.053 g/mL. 2.
- consider pyruvic acid with Ka = 1.4x10^-4. what initial molarity of pyruvic acid would be needed to make 500mL of solution with a pH = 2.5 without using the henderson - hasselbalch equation( please step by step answer and don't use ASI Answer please)Carbon monoxide binds the heme of hemoglobin in the same position as O2; however, it binnds 200 times better than 02 If we use a value of 40 torr for hemoglobin's Pso for 0z. what is its P5o for CO? 0.05 torr 0.20 torr 5 torr 200 torr O 8,000 torrHow many moles of Na2S2O3 would be required to react completely with 0.450 g of AgBr?
