Tema
Q:
Determination of molecolar weight by asmotic pe
Q:
What is the \( \frac{\text { weight }}{\text { volume }} \) percent concentration of the solute given 73.0 g of LiOH in \( 550, \mathrm{~mL} \) of solution? Be sure your
has the correct number of significant figures.
Q:
: Explaining the terms Isotactic
Q:
How is the solubility of solid potassium chloride \( (\mathrm{KCl}) \) in water affected by each of the following changes? Select t
best answer for each part.
Part 1 of 4
Increasing the temperature from \( 25^{\circ} \mathrm{C} \) to \( 81^{\circ} \mathrm{C} \)
increase solubility
no change to solubility
decrease solubility
Q:
What is a periodic trend?
Q:
How to find van't hoff factor?
Q:
6. Balancear las siguientes ecuaciones químicas:
a) \( 2 \mathrm{Al}_{2} \mathrm{O}_{3}(\mathrm{~s}) \rightarrow 4 \mathrm{Al}_{(\mathrm{s})}+3 \mathrm{O}_{2}(\mathrm{~g}) \)
Q:
Suppose you are working with a NaOH stock solution but you need a solution with a lower concentration for your experiment.
Calculate the volume (in mL ) of the 1.400 M stock NaOH solution needed to prepare 250.0 mL of 0.1476 M dilute NaOH solution.
Type answer:
Q:
Glucose (molar mass \( =180.16 \mathrm{~g} / \mathrm{mol} \) ) is a simple, soluble sugar. Glucose solutions are used to treat patients with low blood sugar.
Suppose you prepare a glucose solution using the described procedure.
- Step 1: Dissolve 221.4 g of glucose in enough water to make 500.0 mL of solution.
- Step 2: Transfer 20.8 mL of the solution to a new flask and add enough water to make 250.0 mL of dilute solution.
What is the concentration (in M) of the glucose solution at the end of the procedure?
Q:
Calculate the number of moles in 4.41 g of each of the following:
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