30 What is the volume of a sample of hexane, C6H14, that contains 6.0 x 1025...
23 What is the volume of a sample of octane, C8H18, that contains 8.0 x 1025 hydrogen atoms? The density of octane is 0.703 g/cm'. (A) 6. 7930 x 10 cm (B) 2694.7cm (C) 1197.6 cm (D) 591. 88 cm
30 What is the volume of a sample of octane, CsH s. that contains 5.0 x 1025 hydrogen atoms? The density of octane is 0.703 g/cm'. (A) 1684. 2cm (B) 748. 52 cm (C) 369. 93 cm (D) 0.108 69 cm
What volume of a 6.0% solution of ethanol contains 3.0 g of ethanol? 6. What volume of a 60% solution of ethanol contain 3.0 g of ethanol? A) 5.0 mL B) 6.0 mL C) 10 ml D) 30 mlL E) 50 mlL
What is the volume of a unit cell in cm3 that contains atoms with a diameter of 300 pm arranged in a simple cubic lattice? A) 5.4 x 10-23 cm3 B) 4.2 x 10-23 cm3 C) 2.7 x 10-23 cm3 D) 3.8 x 10-23 cm3 E) 7.6 x 10-23 cm 3
* 10 What is the mass in grams of a sample of Mg(CIO3)2 that contains 6.0 x 1020 atoms of oxygen? (A) 31717. grams (B) 3. 1529 x 1047 grams (C) 1. 1502 grams (D) 31. 299 grams 11 Name the compound Pb(NO3)4. (A) lead (II) nitrite (B) lead (II) nitrate (C) lead (IV) nitrate (D) lead (III) nitride 12 What is the mass % of carbon in (C2H SO)? (A) 7.74% (B) 60.0 % (C) 20.6% (D) 30.7% (E)...
The mass of a copper atom is 1.06 x 1025 kg, and the density of copper is 8920 kg/m3 (a) Determine the number of atoms in 1 cm3 of copper. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully (b) Visualize the one cubic centimeter as formed by stacking up identical cubes, with one copper atom at the center of each. Determine the volume of each cu Cu atom cm3...
Question 3 (1 point) oxygen atoms in 30 molecules of C20H42S3O There are A) 1.2 x 1024 B) 3.6 x 1025 C) 60 D) 1.8 x 1025 15 E) 6.0 x 1023 18
3.A sample of a pure gas at 20 °C and 670 mm Hg occupies a volume of 562 cm3. How many moles of gas are in this sample? 4.An unknown compound contains only carbon and hydrogen. What is the volume (in L) of 1 mol of this gas at 100 °C and 760 mm Hg? 5.The same 1 mol sample of gas from the previous problem has a vapor density of 2.550 g/L. If the empirical formula of the compound...
2-27. What volume of a 6.0%(m/V) solution of ethanol contains 30 g of ethanol A) 6,0 mL B) 10.ml C) 50 mL D) 5.0 mL E) 30.ml 7 2-28. How many 1:10 serial dilutions are needed to prepare a pH 4 solution from 0.1 M hydrochloric acid A) 1 B) 2 C) 3 D) 4 E) 5 2-29. How many grams of glucose should be weighed out to make 1 liter of a rehydration solution that contains 75 mmol of...
-A sample of kerosene weighs 36.4 g. Its volume was measured to be 45.6 mL. What is the density of kerosene? -Acetone, the solvent in some nail polish removers, has a density of 0.791 g/mL. What is the volume of 16.4 g of acetone? -A graduated cylinder was filled with water to the 19.1 mL mark and weighed on a balance. Its mass was 34.16 g. An object made of silver was placed in the cylinder and completely submerged in...