A chemist adds 290.0mL of a 2.63/molL sodium chloride NaCl solution to a reaction flask. Calculate the mass in grams of sodium chloride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding. i

What does it mean for something to be dissolved in watera- it is submerged in water moleculesb-it is stirred in the water moleculesc- it is surrounded by water molecules d-it has water molecules added to it