04/13/20

If you react 1.5 g of salicylic acid with excess acetic anhydride calculate the theoretical yield of aspirin below.
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04/13/20

What mass of water is necessary to prepare 270.0g of .800% saline solution?
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04/13/20

Chemistry help please

What is the molarity of a solution that contains 5 moles of NaNO3 in 550. mL of solution? A) 0.01 M B) 9.1 M C) 2.75 M D) 13.0 M E) 2750 M
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04/13/20

Chemistry help please

25 ml of a salt solution at 2 M is diluted to 48 ml. Calculate the concentration of the new volume. A) 1.04 M B) 3.84 M C) 0.26 M D) 600 M
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04/13/20

chemistry help please

O2 gas travels at a rate of 25 m/s. Calculate the molecular mass of an unknown gas travelling at a rate of 15 m/s.
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04/13/20

Chemistry- Boyle's Law
A certain gas is present in a 13.0 L cylinder at 3.0 atm pressure. If the pressure is increased to 6.0 atm , the volume of the gas decreases to 6.5 L . Find the two constants ki, the initial value... more
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04/13/20

Chemistry Help please

A 115.00 mL container contains hydrogen gas at 1.50 atm. What is the pressure of the gas in mmHg?
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04/13/20

Chemistry Help Please

A tank contains a mixture of H2, N2 and O2 gases. If the total pressure in the tank is 586 kPa and the partial pressures of H2 and O2 are 215 mmHg and 2 atm, respectively, what is the partial... more
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04/13/20

3A(g) + 2B(g)− >4C(g) Kc = 1.33 × 10^21. At this temperature, 1.60 mol of A and 3.60 mol of B are placed in a 1.00 L container, what are the concentrations of A, B, and C at equilibrium?
I have found that B=2.54 and C=2.13. I thought that A was 0, but it is not. I need to find A.
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04/13/20

If a sample of 4.50 miles of hydrogen gas was reacted with excess nitrogen, how many moles of ammonia gas would be produced?
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04/13/20

Chemistry Lab 1- Gases
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals... more
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04/13/20

What is the pH at the equivalence point
Calculate the pH at the equivalence point during the titration of 25.0 mL of 0.75 M acetic acid with 0.75 M sodium hydroxide. (Ka for acetic acid is 1.8 * 10^-5)
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04/13/20

Electroplating -How long does it take?
Consider the electrolysis of molten AlCl3 to obtain pure Aluminum metal using 15 Ampere current. How many hours would it take to produce 35 kg of Aluminum metal? (1Faraday=96485 Coulombs)
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04/13/20

Calculate the internal energy change for each of the following.
A piston is compressed from a volume of 8.48 L to 2.87 L against a constant pressure of 1.79 atm. In the process, there is a heat gain by the system of 350. J.
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04/13/20

Chemistry Kinetics Help
The reaction C4H8(g)⟶2C2H4(g)has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, k, is 6.1×10−8 s−1. What is the value of the rate constant at 800.0 K?
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04/12/20

Thermochemistry
5 O2(g) + 6 C (graphite) ----> 4 CO2(g) + 2 CO(g) Delta H1 = -1798 KJCaO(s) + H2O (l) ------> Ca(OH)2 (aq) Delta H2 = -65 KJCaC2 (s) + 2 H2O(l) -----> C2H2(g) +Ca(OH)2 (aq) Delta H3 = -126... more
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04/12/20

In using the benedict's test, how could you determine the amount of sugar in the sample?
Is it possible to determine the amount of sugar using the Benedict's test, and if so, how?
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04/12/20

Identify the oxidizing agent and the reducing agent in the reaction.
Identify the oxidizing agent and the reducing agent in the reaction.8H+(aq) + 6Cl–(aq) + Sn(s) + 4NO3–(aq) → SnCl62–(aq) + 4NO2(g) + 4H2O(l)the answer is: oxidizing agent: NO3-reducing agent:... more
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04/12/20

Which of these is the strongest oxidizing agent listed here?
Consider the following half-reactions. Which of these is the strongest oxidizing agent listed here?Au+(aq) + e- → Au(s) Eo = 1.69 VN2O(g) + 2 H+(aq) + 2 e- → N2(g) + H2O(l) Eo = 1.77 VCr3+(aq) + 3... more
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04/12/20

Determine Eo for the following reaction
Determine Eo for the following reaction, using the given standard reduction potentials:Hg(l) + Mn2+(aq) → Hg2+(aq) + Mn(s)Eo for Mn2+(aq) = -1.18 VEo for Hg2+(aq) = +0.85 VI know its (-1.18) -... more
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04/12/20

Balance the following equation in basic solution:
Balance the following equation in basic solution:MnO4-(aq) +Fe(OH)2(s) → MnO2(s) + Fe(OH)3(s)What is the coefficient of water?the answer is: 2please show steps so I can follow, thank you!
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04/12/20

Balance the following equation in acidic solution using the lowest possible integers and give the coefficient of H+.
Balance the following equation in acidic solution using the lowest possible integers and give the coefficient of H+.MnO4-(aq) + H2SO3(aq) → Mn2+(aq) + HSO4-(aq)the answer is: 1please show steps so... more
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04/12/20

Balance the following equation in basic solution using the lowest possible integers and give the coefficient of water.
Balance the following equation in basic solution using the lowest possible integers and give the coefficient of water.MnO4-(aq) + NO2-(aq) → MnO2(s) + NO3-(aq)Where does water come in?I got the... more
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04/12/20

Given that Eored of ozone is 2.07 V, calculate Eored of MO2.
Consider the reaction between ozone and a metal cation, M2+, to form the metal oxide, MO2, and dioxygen:O3 + M2+(aq) + H2O(l) →O2(g) + MO2(s) + 2 H+for which Eocell = 0.3.Given that Eored of ozone... more
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04/12/20

Thermochemistry
Nickel pieces weighing 7.00 g total (specific heat capacity = 0.44 J/g. 0C) and a 14.00 g silver bar (specific heat capacity = 0.24 J/g. 0C) are heated to 1200 C. The objects are placed into 85.0 g... more
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