1. (a) 1.5055×1023 molecules
(b) 2.31×1022 molecules
(c) 1.24×1022 molecules
2.(a) 10.6 g (b) 8.55 g (c) 3.82 g
3. (a) 0.0118 moles (b) 1.24 g (c) 0.0160 moles
4. (a) 1.02 g (b) 14.2 g
1) Calculate the number of molecules in the following: a) 0.25 mol of glucose (C6H1206) b)...
Question Completion Status: QUESTIONS The number of molecules in 6.5g H20 is O 0.361 molecules 2.2x1023 molecules 3.91x1024 molecules 3.3x1022 molecules QUESTION 10 A sample of ammonia NH3 weighs 25.5g. How many NH3 molecules is this? 25.5 molecules 1.50 molecules 9.01x1022 molecules 36.04x1023 molecules QUESTION 7 Calculate the number of moles in 12.8g of CH4 and mark the right answer. O 4.0 mol. 12.8 mol O 0.045 mol O 0.798 mol. QUESTION 8 Calculate the number of moles in 12.8g...
6. Calculate each of the following: a. the number of atoms in 0.5 mol ofc b the number of So, molecules in 1.28 mol of SO c. the moles of Fe in a sample containing 5.22 x10 - atoms of Fe 7. Calculate the molar mass for each of the following use the periodic table for the atomic mass): H2SO4 Fe2O3 Al(SO.) Mg(OH)2 (NH4)2CO3 8. How many moles of Cl2 are there in 25 g of Ciz? 9. How many...
Calculate the entropy change from burning 41.1 g of solid glucose (C6H1206, molar mass 180.2 g/mol) to produce gaseous carbon dioxide and gaseous water, using the values in the table below. S0/JK mor Substance Glucose(s) O2(g) CO2(g) H2O(g) 209.2 205.15 213.79 188.84 Select one: a. 4.01e4 J/K b. 223 J/K C. -2.67 J/K d. None of the other options e. -482 J/K
A) Calculate the number of molecules of CH4 in 72 g CH4. B) The number of grams in 3.33 mol of sodium carbonate is C) 3.44 g of Ca represents how many moles? D) 8.55 x 10-3 moles of an unknown compound has a mass of 0.376 g. The compound could be:
Calculate the entropy change from burning 41.1 g of solid glucose (C6H1206, molar mass 180.2 g/mol) to produce gaseous carbon dioxide and gaseous water, using the values in the table below. Substance º/JK' mort Glucose(s) 209.2 02(9) 205.15 CO2(g) 213.79 H2009) 188.84 Select one: a. 4.01e4 J/K o b. 223 JIK O C.-2.67 J/K d. None of the other options. e-482 J/K
Suppose the brain needs to metabolizes about 4 g glucose (C6H1206, MW =180 g/mol) per hour. Given that the enthalpy of combustion of glucose in this metabolism reaction is AH comb = -2,808 kJ/mol, about how much energy does the brain use per day? A. 700 kJ B. 1,500 kJ C.8,400 kJ D. 11,000 kJ E. 17,000 kJ
Part D Calculate the number of moles of C,Hg in 2.01 x 1023 molecules of C, H. Express your answer using three significant figures. O ALDO ? moles of C,H Submit Previous Answers Request Answer Part C How many moles of sulfate ions (SO?) are present in 1.6 moles of Al2(SO4),? Express the number of moles to two significant figures. - Po A¢ * Ro ? ns0 moles
Calculate the number of moles in 181.7 g of each of the following compounds. (a) SO2 mol SO2 (b) Na2SO4 mol Na2SO4 (c) BaSO4 mol BaSO4 (d) KAl(SO4)2 mol KAl(SO4)2
Question 22 (2.5 points) How many grams of glucose (C6H1206) are in 3.55 moles of glucose? A) 180. g B) 639 g C) 103 g D) 426 g E) 50.7 g А с ОЕ B D Question 23 (2.5 points) How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg in the following reaction? 2Mg (s) + O2(g) → 2MgO(s) A) 30.4 g B) 50.4 g C) 60.8 g D) 101 g E) 201...
How many moles of NH3 can be produced from 16.5 mol of H2 and excess N2? Express your answer numerically in moles. View Available Hint(s) - Po A mo ? mol NH3 Submit Part B and excess H2 How many grams of NH3 can be produced from 2.78 mol of Express your answer numerically in grams. View Available Hint(s) O AL O2 ? g NH3