many molecules are contained in each compound? a. 1.35 mol of carbon disulfide (CS2) b. 0.254 mol of diarsenic trioxide (As203) c. 1.25 mol of water d. 150.0 mol of HCl How Determine the number of moles in each substance. a. 3.25 x 1020 atoms of lead b. 4.96 x 1024 molecules of glucose c. 1.56 x 1023 formula units of sodium hydroxide d. 1.25 x 1025 copper(II) ions Perform the following conversions. a. 1.51 x 1015 atoms of Si to mol of Si p. 4.25 x 10-2 mol of H2SO4 to molecules of H2SO4 c. 8.95 x 1025 molecules of CCI4 to mol of CCI4 H. 5.90 mol of Ca to atoms of Ca

How many mole of specified particles are present in a sample of each of the following substances if each sample weighs 5.00 g? a. CO molecules b. CO2 molecules c. B4H10 molecules d. U atoms

A compound is composed of 57.51 % carbon, 1.63% H, 18.89% N, 13.05 % O, and the remainder other elements. Calculate the mass of carbon (in grams) contained in 74.83 g of the compound. A. 52.7 B. 36.9 C. 39.8 D. 45.4 E. 43.0

Name each compound, and then calculate its mass. Express this value in scientific notation.

How many grams of Mo2(SO3)3 are in 1.34x1023 molecules of Mo2(SO3)3?    a. 4.17x104 grams b. 432.13 grams c. 96.4 grams d. 6.24x1021 grams e. 5.80x1025 grams

How many moles of tungsten atoms are in 4.8 x 10^24 atoms in tungsten. a. 8.0x10^0 moles b. 8.0x10^23 moles c. 2.8x10^48 moles

How many formula units are in 0.761 g of iron(III) nitrate?   A. 1.89 x 1021 f.u.   B. 3.13 x 1021 f.u.   C. 3.15 x 10-3 f.u.   D. 2.36 x 1021 f.u.   E. 3.93 x 10-3 f.u.

10. What does Avogadro's number represent? a. the number of atoms in 1 mol of an element b. the number of molecules in 1 mol of a compound c. the number of Na* ions in 1 mol of NaClag) d. all of the above 11. 6.022 x 1023 atoms of nickel is equivalent to c. 58.69 g Nickel d. All of the above a. 1 mole of Nickel atoms b. 58.69 amu Nickel 12. How many atoms of lead are there in 2 moles of lead? a. 6.022 x 1023 Pb atoms c. 1.2044 x 1024 Pb atoms b. 6.022 x 1024 Pb atoms d. All of the above

The formula for sulfur hexafluoride is . a. How many molecules are in 2.24 grams of sulfur hexafluoride? ____molecules b. What is the mass in grams of 7.72 x 10^22 molecules of sulfur hexafluoride? ____grams

What is the molar mass of calcnum chloride hexahydrate? a 75.53 g/mol b. 111.0gmol e 117.0 gmol d. 183.6 g mol e 219.1 g mol