A physical property that can be described numerically as the grams of a substance that will dissolve in 100 g of water or other solvent.

Please answer number 7

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Suppose you have a mixture with a mass of 4.047 g which contains iron fillings, aluminum powder, and sucrose. You separate the iron filings from the mixture using a magnet. The iron filings have a mass of 0.303 g. What is the percent by mass of iron in the mixture? O Macmillan Leaming % iron=

10.0 mL of a salt solution has a mass of 12.8 g. The solution is evaporated to dryness and the solute has a mass of 3.5 g. What is the mass percent of the salt solution?

Use the law of conservation of mass to answer the questions. Consider a hypothetical reaction in which A and B are reactants and C and D are products. If 23 g of A completely reacts with 22 g of B to produce 19 g of C, how many grams of D will be produced? mass of D: A 3.4 g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.1 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After the reaction, the contents of the reaction vessel weigh 11.5 g. What is the mass of carbon dioxide released during the reaction? mass of carbon dioxide:

4.  A solution is prepared by taking a clean and dry 50.00 mL volumetric flask.  Some sucrose (Mm 342.2 g/mol) is added to the flask with the following mass measurements recorded: mass of empty volumetric flask:  142.88 g mass of weighing dish + sucrose: 29.83 g mass of weighing dish after adding sucrose to volumetric flask: 24.62 g Some water is added to the flask, the solution stirred until all the sucrose is dissolved.  Then water is added carefully to the mark on the flask.  The filled flask is then weighed again. mass of filled volumetric flask:   187.30 g What is the mole fraction of water?  Answer to 3 decimal places.

Convert the following measurement. - 6 7.7 x 10 kg g mol · dL mol · L

I am having a bit of trouble with significant figures and rounding. In a question such as the one below, would the sig fig I put in my answer be correct? How many moles are present in 3.44 g CoCl2 ꞏ 6H2O?      = (Which sig fig amount is correct-->) .0217 moles or .021 moles The whole answer was 0.02177904, would I round this answer to the 3rd sig fig? So, is the correct answer actually .022?

A 0.231 g piece of solid magnesium reacts with gaseous oxygen from the atmosphere to form solid magnesium oxide.  In the laboratory a student weighs the mass of the magnesium oxide collected from this reaction as 0.309 g.