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The percent concentration of a solution is a ratio of the amounts of dissolved solute and solution, expressed as a percentage. The percent concentration of a solution can be written generally as % concentration = amount of solute x 100% amount of solution Depending on the situation, a percent concentration might be calculated for mass/mass, volume/volume, or mass/volume. tab os lock ntrol esc alt option Q A Z 5,566 2 W S AUG 2 F2 X H command 3 20 E F3 D $ 4 C 888 R Part A F4 70 Calculate the mass percent of a solution that is prepared by adding 54.8 g of NaOH to 461 g of H₂O. Express your answer numerically. ► View Available Hint(s) LIVE ΑΣΦΑ++ ο Submit Part B F [ΫΠ| ΑΣΦ Calculate the mass/volume percent of a NaCl solution in which 136 g of NaCl is dissolved in enough water to give a total volume of 1.44 L . Express your answer numerically. View Available Hint(s) % 5 V T G - 0 B MacBook Air F6 Y & - V 8⁰ 7 H #tv NA ? F7 ? U N %(m/m) %(m/v) 00* J FB M ( 9 K L F10 P command Review I Cons…

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Q22:  Phosphate buffer solution is purchased as a(n) 2x stock solution. The solution is more concentrated than the working stock.  If tasked with making 128 mL of a 1x solution of PBS, how many mL of the stock solution would be needed? Report your answer in standard decimal notation rounded to one decimal place.

CHCASE Dashboard Item 3 A student modek four types of land use in a city. Each model has the same amounts of soil, pebbles, and gravel. A bottle is placed under each model to represent an aquifer, as showWn. Item 4 Item 5 Item 6 Item 7 Aqulfer Aquifer Item 8 Model P Model Q Item 9 Item 1 Item Item Aquifer Aquifer Model R Model S Which model represents land use that will recharge groundwater in a city the most, and why? O Model P; it has green spaces with grass and plants. O Model Q; it has neighborhoods with large front yards. O Model R; it has buildings near paved roads and parking lots. O Model S; it has houses near large trees with deep roots.

A student prepares a 0.54 mM aqueous solution of crotonic acid (C,H,CO,H). Calculate the fraction of crotonic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. I % x10

Lab Data Reevaluate your calculations. Collected Volume sodium carbonate (mL) 99.0 Molarity sodium carbonate (M) 0.10 Volume calcium chloride (mL) 100.0 Molarity calcium chloride (M) 0.10 Observations The substance turns from clear liquid to a cloudy white substance. Mass filter paper (g) 0.27 Mass filter paper + precipitate (g) 1.14 Calculated Observed mass calcium 0.87 carbonate (g) MY NOTES Identify limiting reactant Sodium carbonate Expected mass calcium carbonate (g) Percent yield (%) How to calculate theoretical yield and percent yield e Type here to search 近

A student prepares a 0.28 mM aqueous solution of acetic acid (CH,CO,H). Calculate the fraction of acetic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. |% x10

A small business brings in a revenue of $60000 for the week. The payroll for the week is $20000. The owner spends $1000 on the company anniversary party. Of what is left, one third is donated to a local charity, and $500 less than half the amount that went to the charity goes to building repairs. What is the final amount of profit for the week? Question 5 options: $20000 $7000 $13000