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Viewed Questions

Solve each rational equation.
$$\frac{2}{x-2}+\frac{4}{x}=2$$

Solve each rational equation. $$\frac{2}{x-2}+\frac{4}{x}=2$$

Introductory Algebra for College Students

Rational Expressions

Solving Rational Equations

A flat square piece of cardboard is used to construct an open box. Cutting a 1 foot by 1 foot square off of each corner and folding up the edges will yield an open box (assuming these edges are taped together). If the desired volume of the box is 9 cubic feet, what are the dimensions of the original square piece of cardboard?

Precalculus

Review: Equations and Inequalities

Quadratic Equations

Use synthetic division to find the quotient
$$\left(x^{4}+5 x^{3}-3 x^{2}-13 x+10\right) \div(x+5)$$

Use synthetic division to find the quotient $$\left(x^{4}+5 x^{3}-3 x^{2}-13 x+10\right) \div(x+5)$$

Precalculus

Polynomial and Rational Functions

Dividing Polynomials

Write each quadratic function in the form $f(x)=a(x-h)^{2}+k$ by completing the square. Also find the vertex of the associated parabola and determine whether it is a maximum or minimum point.
$$w(x)=-x^{2}+6 x+4$$

Write each quadratic function in the form $f(x)=a(x-h)^{2}+k$ by completing the square. Also find the vertex of the associated parabola and determine whether it is a maximum or minimum point. $$w(x)=-x^{2}+6 x+4$$

 Precalculus : Building Concepts and Connections

More About Functions and Equations

Graphs of Quadratic Functions

Questions asked

INSTANT ANSWER

\begin{tabular}{|l|l|l|l|l|l|} \hline Measurement & & & & & \\ \hline & 1 & 2 & 3 & 4 & 5 \\ \hline .) solution temperature & \( 25.1^{\circ} \mathrm{C} \) & \( 25.1^{\circ} \mathrm{C} \) & \( 25.1^{\circ} \mathrm{C} \) & \( 25.0^{\circ} \mathrm{C} \) & \( 25.5^{\circ} \mathrm{C} \) \\ \hline 2.) time elapsed (bluish gray) & 3425 & 1625 & 1445 & \( 9 / 5 \) & 705 \\ \hline 3.) moles \( \mathrm{S}_{2} \mathrm{O}_{3}{ }^{2-} \) reacted & 0.004 mol & 0.004 mol & \( 0,004 \mathrm{~mol} \) & 0.004 mo & 0.004 mo \\ \hline 4.) moles of \( I_{2} \) produced & 0.002 mol & 0.002 mol & 0.002 mol & 0.002 mol & 0.002 mo \\ \hline 5.) Molarity of \( I_{2} \) produced & 0.010 m & 0.010 M & 0.010 M & 0.010 M & 0.010 M \\ \hline 6.) rate of appearance \( \mathrm{I}_{2} \) & \( 2.92 \times 10^{-5} \mathrm{Mg} \) & \( 6.17 \times 10^{-5} \frac{\mathrm{D}}{\mathrm{s}} \) & \( 6.94 \times 10^{-5} \frac{\mathrm{~m}}{5} \) & \( 1.10 \mathrm{~m}^{3.05 x} \) \( \times 10^{-4} \frac{\mathrm{~s}}{\mathrm{~s}} 10^{-5} \mathrm{mg} \) & \( 1.43 \times 10^{-4} \) \\ \hline 7.) In rate of appearance & -10.4 ? & \( -9.69 \frac{m}{s} \) & \( -0.57 \frac{\mathrm{~m}}{\mathrm{~s}} \) & \( -9.12 \frac{\mathrm{~m}}{\mathrm{~s}}-10.2 \frac{\mathrm{~m}}{\mathrm{~s}} \) & \( -8.85 \frac{m}{s} \) \\ \hline 8.) initial \( \left[\mathrm{I}^{1-}\right] \) & 0.015 m & 0.030 M & 0.045 m & 0,045 M & 0.045 M \\ \hline 9.) In initial [ \( \left.\mathrm{I}^{1-}\right] \) & \( -4.20 \mathrm{M} \) & \( -3.51 \mathrm{M} \) & \( -3.10 \mathrm{M} \) & \( -3.10 \mathrm{~m} \) & \( -3.10 \mathrm{M} \) \\ \hline 10.) initial \( \left[\mathrm{H}_{2} \mathrm{O}_{2}\right] \) & 0,015 M & 0.015 M & 0.015 M & 0.025 M & 0.035 m \\ \hline 11.) In initial \( \left[\mathrm{H}_{2} \mathrm{O}_{2}\right] \) & \( -4.20 \mathrm{~m} \) & \( -4.20 \mathrm{~m} \) & \( -4.20 \mathrm{M} \) & \( -3.69 \mathrm{M} \) & -3.35 M \\ \hline 12.) reaction order & \multicolumn{2}{|c|}{p =} & \multicolumn{3}{|c|}{q=} \\ \hline 13.) calculated value of \( \mathrm{k}^{\prime} \) & & & & & \\ \hline 14.) average value of \( \mathrm{k}^{\prime} \) & \multicolumn{5}{|c|}{} \\ \hline Relative Standard Deviation & \multicolumn{5}{|r|}{(attach spreadsheet and write the value)} \\ \hline \end{tabular} Time and exact temperature needed for trial carried out at \( \sim 10 \mathrm{C} \) Calculated value of k at \( \sim 10 \mathrm{C} \) \( \qquad \) Calculated value of Activation Energy \( \qquad \) OBSERVATIONS:

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INSTANT ANSWER

Red coloring RM KW 04-Mar-2025 \begin{tabular}{|c|c|c|} \hline Sample base name Sample & 6/15 & \multirow[t]{2}{*}{Accessory \( \stackrel{\circ}{\circ} \)} \\ \hline & Result \( =\mathrm{ABS}(517) \times 1 \) & \\ \hline Sample & \begin{tabular}{l} \[ 0.834 \] \\ ABS(517) \end{tabular} & Result [] \\ \hline Sample 3 & 0.132 & 0.132 \\ \hline Sample 4 & 0.168 & 0.168 \\ \hline Sample 5 & 1.927 & 1.927 \\ \hline Sample 6 & 0.979 & 0.979 \\ \hline Sample 7 & 1.467 & 1.467 \\ \hline \multicolumn{3}{|l|}{Blank} \\ \hline Sample 8 & 1.931 & 1.931 \\ \hline Sample 9 & 0.431 & 0.431 \\ \hline Sample 10 & 3.166 & 3.166 \\ \hline Sample 11 & 0.834 & 0.834 \\ \hline & \( \bullet \) & \\ \hline \end{tabular} Place cell changer into compartment and press "Start" Start

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INSTANT ANSWER

KIO3(aq) + 6H+(aq) + 5Iāˆ’(aq) → 3I2(aq) + 3H2O(l) + K+(aq) (i) C6H8O6(aq) + I2(aq) → C6H6O6(aq) + 2Iāˆ’(aq) + 2H+(aq) Mass of tablet= 1.104g Initial mass of sample (g)=1.080g Initial volume of burette=50mL (mL) Final volume of burette=40mL (mL) Volume of KIO3 (mL)=10mL Molarity of KIO3 solution = ? (from part 1) Moles of KIO3 Moles of C6H8O6 Mass of C6H8O6 (g) Mass% of vitamin C per tablet:

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INSTANT ANSWER

Mass of tablet= 1.104g Initial mass of sample (g)=1.080g Initial volume of burette=50mL (mL) Final volume of burette=40mL (mL) Volume of KIO3 (mL)=10mL Molarity of KIO3 solution = ? (from part 1) Moles of KIO3 Moles of C6H8O6 Mass of C6H8O6 (g

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INSTANT ANSWER

Consider the following equation. What is the molarity of a KMnO4 solution if 10.0 mL of KMnO4 reacts completely with 11.5 mL of 0.125 M oxalic acid, H2C2O4? 2KMnO4 + 5 H2C2O4 + 3H2SO4 → 10CO2 + 2MnSO4 + K2SO4 + 8H2O

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7 4. In each of the following reactions, assign oxidation states to each of the atoms to identify the substance that is oxidized and the substance that is reduced. a. Cr2O3 + 2Al → Al2O3 + 2Cr b. 3H2 + Fe2O3 → 2Fe + 3H2O

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3. Assign oxidation states of all the atoms in each of the following compounds and ions. a. K2SO4 b. IO3- c. Cr2O72- d. Ca(NO3)2

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INSTANT ANSWER

Describe the role of each of the followings in this experiment. a. KIO3: b. KI: c. Ascorbic acid: d. Starch solution

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INSTANT ANSWER

The formula for ascorbic acid is C6H8O6. Determine its molar mass

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INSTANT ANSWER

Oxidation of Vitamin C KIO3(aq) + 6H+(aq) + 5Iāˆ’(aq) → 3I2(aq) + 3H2O(l) + K+(aq) (i) C6H8O6(aq) + I2(aq) → C6H6O6(aq) + 2Iāˆ’(aq) + 2H+(aq) Initial mass of ascorbic acid (g) Moles of ascorbic acid (C6H8O6) Initial volume of burette (mL) Final volume of burette (mL) Volume of KIO3 (mL) Moles of KIO3 Molarity of KIO3 solution Average molarity Show calculation set up here.

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