A sample of ammonia has a mass of 89.9 g. How many molecules are in this sample? Group of answer choices

5.41 × 1025 molecules

1.78 × 10–15 molecules

3.18 × 1024 molecules

5.28 molecules

1.14 × 1023 molecules

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

A100 kmol/h stream that is 97 mole% carbon tetrachloride (ccl4) and 3% carbon disulfide (cs2) is to be recovered from the bottom of a distillation column. the feed to the column is 16 mole% cs2 and 84% ccl4, and 2% of the ccl4 entering the column is contained in the overhead stream leaving the top of the column. calculate the mass and mole fractions of ccl4 in the overhead stream, and determine the molar flow rates of ccl4 and cs2 in the overhead and feed streams. 12. mw_ccla- 153.82; mw_cs2-76.14.