2.65 We need the density of iron, (d), in order to determine the mass of 1 cm3 of iron. Dividing this mass by the molar mass of iron, (b), determines the number of moles in 1 cm3 of iron. Multiplying that number by Avogadro’s constant, (c), provides the final answer – the number of
H2O b. O2 c. Br2 d. CO2 If they all have the same kinetic energy, then we need to look at their atomic masses to determine who will travel at the highest speed. After all, KE = ½ mv2—smallest molar mass will give highest speed. H2O = 18 g/mol Which element has the highest first ionization energy? Calcium b. Carbon c. Neon d.
Since water has a molecular weigh of 18 g mol-1, 1 mole will have a mass of 18 g. From the density this should have a volume of only 18 mL. Clearly this is a lot less than an ideal gas at STP which is more than 1000 times larger in terms of its molar volume. In the video given below, Dr. LaBrake talks about the Standard Molar Volume of an Ideal ...
If 3 mol of B combine with 2 mol of A to give 1 mol of X, the weight of 5 mol of X is A)246 gm (B) 1230 amu (C) 1.23 kg (D) None of these. 65. Which of the following has greatest no. of oxygen atoms (A) 10 mole water (B) 200gm of C12H22O11 (C) 144 gm O3 (D) 2.5 mole H2SO3. 66. Which of the following substances contains the greatest mass of chlorine
Textbook solution for Chemistry & Chemical Reactivity 9th Edition John C. Kotz Chapter 2.9 Problem 3RC. We have step-by-step solutions for your textbooks written by Bartleby experts! (a) 0.50 mol Na.
45. A technician measures 1.75 L of a standard solution of hydrochloric acid, HCl(aq), with a concentration of 9.00 mol/L. Determine the amount of water that must be added to create a solution with a concentration of 2.50 mol/L. Answer: Submit your completed Assignment Booklet A1 to your teacher for assessment.
its molar mass. What is the molecular formula of the compound? (A) C 4 H 4 O 5 (B) C 10 H 12 (C) C 7 O 3 (D)C 6 H 12 O 3 (E) C 4 H 8 O 5 13. A 54 gram sample of an unknown hydrocarbon was burned in the presence of excess oxygen to produce 44.0 grams of carbon dioxide and 27.0 grams of water. A mass spectrometry analysis produced a molecular ion ...
How many moles of chromium would be electroplated by passing a current of 5.2 amperes through a solution of Cr2(SO4)3 for 45.0 minutes? (a) 0.048 mol c 23. (b) 2.9 mol (c) 0.15 mol (d) 6.9 mol (e) 0.073 mol An aqueous copper(II) sulfate solution is electrolyzed for 45 minutes. A 3.2 ampere current is used. What mass of copper is produced?
a. Determine the # mol of H 2 that can be produced from 6.0 g of Al b. Using the ideal gas law, convert the # mol of H 2 into L of H 2. 1) We need the following conversion factors: Molar mass Al: 26.98 g/mol Mole ratio: 3 mol H 2/2 mol Al
Annotated solution: The key is to know that lower mass means higher molecular speed and effusion rate. So hydrogen gas has the lowest mass, then it has the highest speed. In many organisms, glucose is oxidized to carbon dioxide and water, as represented by the following equation. C6H12O6(s)+6O2(g)=6CO2(g)+6H2O(l)
The fallout in probability density with distance has an important effect. Near the nucleus, the volume of each layer increases faster than its density of dots has two regions of higher electron density. The radial probability distibution of the more distant region is higher than that of the closer one because...
In addition, since the mass differences at 1 Da (H 2 O–NH 3), 17 Da (NH 3 loss) and 18 Da (H 2 O loss) give high probabilities of being from the same group ions, and the values of 39 and 40 Da give ∼41% probability of being from Gly-H 2 O and Gly-NH 3, in the following calculations, we set δ 2 to be 35 Da. Type-2 edges were constructed ...
Dec 24, 2014 · Convert the following numbers into scientific notation. 85,000,000 0.00019 Put the following into decimal notation. 8.72 × 10-8; 3 × 10 4; Place the following units of mass in order from smallest to largest: g, kg, μg, g, pg, Mg, ng, cg, dg. Explain what is wrong with the following statement: “This rock weighs 8 kilograms.”
a) 9.4 ´ 10 2 mol b) 5.3 ´ 10 3 mol c) 3.0 ´ 10 4 mol d) 3.3 ´ 10 4 mol e) 9.6 ´ 10 5 mol Answer: a 43. The density of silver is 10.5 g/cm 3. Calculate the number of silver atoms present in a cube that has an edge of 2.50 cm. a) 5.86 ´ 10 22 atoms. b) 1.47 ´ 10 23 atoms. c) 3.66 ´ 10 23 atoms. d) 9.16 ´ 10 23 atoms. e) 9.67 ´ 10 25 atoms
1. What are the units of molar mass? 2. The mass of 2.5 X 10 4 grapes is 50 kilograms, and that of an equal number of oranges is 1.2 X 10 3 kg. What is the mass ratio of a single single grape to a single orange? 3. A mole of carbon atoms has a mass of 12 grams, and a mole of magnesium atoms, 24 grams.
Put the paragraphs of the argumentative essay in the correct order.