07/03/22

Chemistry 102: Kinetics: Rate Law
Remember to use square brackets to show concentration. Do not include multiplication symbols in the rate equation. Do not place spaces in your answer.Write the rate law for the following reaction,... more
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07/03/22

Help me solve this
You are studying the reaction:2 A + B + 3 C --> D + 4 EIf the rate is 2.67 M/min with respect to [A], what is the rate with respect to C?
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07/03/22

Finding pH of a weak acid solution
A 0.171M weak acid solution has a pH of 4.27. Find the Ka for this acid.
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07/03/22

Finding pH of 0.215M HCIO2
Please find the pH of 0.215M HCIO2(aq) solution. Ka=0.011
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07/03/22

What is the value of k for this reaction?
You have been studying the reaction:A(g) + 2 B(g) --> C(l)And have determined that the reaction is 2nd order with respect to A and 0th order with respect to B. As part of your experiment, you... more
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07/03/22

How do you calculate this?
You have prepared a solution by dissolving 14.521g of dodecane (C12H26) in 34.50mL of cyclohexane (C6H12) at 25°C. What is the expected vapor pressure (in units of mmHg) of this solution? At 25°C,... more
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07/02/22

Can you check if my steps are correct to this problem??
You have prepared a solution by dissolving 73.15mg of sucrose (table sugar, C12H22O11) in 1.55kg of water. What is this solution's sucrose concentration in parts per million, ppm? ppm=... more
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07/02/22

A given sample of Na2SO4 contains 6.02×10^22 SO4²- ions. Calculate number of Na+ ions, number of formula units, weight of the sample
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07/02/22

Acid Base Titration

To reach the endpoint in titration, a sulfuric acid solution (H2SO4) of 15mL requires 22.80mL of 0.1925M NaOH to reach the endpoint in a titration, what is the molarity of the sulfuric acid... more
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07/02/22

Acid Base Titration

A 0.2650g sample of KHP required 13.42mL of Ca(OH)2 solutions reach the phenolphthalein endpoint. What is the molarity of the calcium hydroxide solution? my Final answer I got is 9.69 · 10-2M.... more
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07/01/22

I need help solving this problem
A reaction is found to be 0th order with respect to chlorate ion. If the initial concentration of chlorate ion is 0.883M and the rate law constant is 0.0193 M/sec, what will the concentration of... more
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07/01/22

Need help solving this!
You have prepared a solution by dissolving 16.425g of dextrose (C6H12O6) in 21.50mL of water at 25°C. What is the expected vapor pressure (in units of atm) of this solution? The vapor pressure of... more
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06/30/22

According to the law of conservation of mass, if 32.7 grams of N2 and 37.3 grams of O2 combine to form NO, how many grams of NO must form?
The compound NO can be formed by combining N2 and O2. This can be represented at the atomic level by a chemical equation: N2 + O2  2NO According to the law of conservation of mass, if 32.7 grams... more
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06/30/22

According to the law of conservation of mass, if 29.5 grams of NH4Cl decomposes and 9.4 grams of NH3 is formed, how many grams of HCl must simultaneously be formed?
The compound NH4Cl can be decomposed to form NH3 and HCl. This can be represented at the atomic level by a chemical equation: NH4Cl  NH3 + HCl According to the law of conservation of mass,... more
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06/30/22

How many grams of the hydrate must the student weigh out in order to get the desired amount of the anhydrous compound?
A student is running an experiment in which 54.1 grams of KF is needed, but the only jar of reagent in the lab is labelled potassium fluoride dihydrate. How many grams of the hydrate must the... more
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06/30/22

It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration).
It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration).A 44.97 gram sample of a hydrate of CaSO4 was heated thoroughly in a porcelain... more
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06/29/22

A solution containing 15.2 g of a molecular compound dissolved in 100.0 g of water has a boiling point of 101.5 °C. Calculate the molar mass of the compound. The 𝐾b for water is 0.512 °C/m.
molar mass = g/mol?
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06/29/22

Help me solve this!!
What is the expected freezing point of a solution made by dissolving 15.03g of potassium chlorate in 69.50mL of water?The freezing point depression constant for water is 1.86°C/molal. Report your... more
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06/29/22

Help me solve this!!
You have prepared an iron(III) solution by diluting 13.50mL of 7.73M iron(III) nitrate to a total volume of 270.0mL. What is the iron(III) ion concentration in this new solution? (show steps)
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06/29/22

Help me solve this problem??
What is the expected boiling point of a solution made by dissolving 14.33g of glycerol (C3H8O3) in 51.00mL of water?The boiling point elevation constant for water is 0.512°C/molal. Report your... more
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06/29/22

Chemistry 102: Kinetics: rate constant
The rate constant for the reaction below was determined to be 3.241×10-5  s–1 at 800 K. The activation energy of the reaction is 265  kJ/mol. What would be the value of the rate constant... more
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06/29/22

Kinetics: Chemistry 102: concentration problem
The rate of decomposition of PH3 was studied at 951.00 °C. The rate constant was found to be 0.0595  s–1.4PH3​P4​+6H2​If the reaction is begun with an initial PH3 concentration of 0.95 M, what will... more
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06/29/22

May I get help.
A 2.96 L2.96 L aqueous solution of KOHKOH contains 181 g181 g of KOHKOH. The solution has a density of 1.29 g/mL1.29 g/mL.Calculate the molarity (𝑀M), molality (𝑚m), and mass percent concentration... more
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06/29/22

Help me solve this!!
You have prepared a solution by dissolving 2.709g of nickel(II) chloride tetrahydrate in 60.0mL of water. What is this solution's chloride ion concentration in molality, m? (show steps)
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06/29/22

Help me solve this
You have prepared a solution by dissolving 232.29mg of copper(II) nitrate pentahydrate in 1.45kg of water. What is this solution's Cu+2 concentration in parts per million, ppm? (show steps)
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