25,963 Answered Questions for the topic chemistry

Chemistry

03/23/23

The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate constant at 475 K is 0.0450 1/min, then what is the value of the rate constant at 789 K? (R = 8.314 J/mol • K)
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Chemistry

03/23/23

Step by step chemistry ASP
A container consists of 75% oxygen, 10% hydrogen, and 15% nitrogen. The total pressure of the container is 50.0 atm. What is the partial pressure of nitrogen in the container? (Number only, 1... more
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Chemistry

03/23/23

Step by step chemistry

How many mmHg are in 75.7 kpa? Round to 1 decimal place and answer in numbers ONLYHow many torr are in 84.2 mmHg? Round to 1 decimal place and answer in numbers ONLy
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Chemistry

03/23/23

A 165.0 mL solution of 2.282 M strontium nitrate is mixed with 220.0 mL of a 2.278 M sodium fluoride solution. Calculate the mass of the resulting strontium fluoride precipitate.
Assuming complete precipitation, calculate the final concentration of each ion. If the ion is no longer in solution, enter a 0 for the concentration.Find Na+NO-3Sr2F-
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Chemistry

03/22/23

Determine the limiting reagent of MgO(s)+2HCl(aq)= MgCl2(aq)+H2O when there are 1.0g MgO and 76.3g HCl
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Chemistry

03/22/23

How many moles of carbon disulfide ( CS2 ) are in 47.5 g of the compound?
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Chemistry

03/22/23

Determine the limiting reagent in Mg(s)+2HCl(aq)= MgCl2(aq)+H2(g) when Mg has .122g and HCl has 40.68g
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Chemistry

03/22/23

Determine the limiting reagent of MgO(s)+2HCl(aq)= MgCl2(aq)+H2O
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Chemistry

03/22/23

Determine the limiting reagent in Mg(s)+2HCl(aq)= MgCl2(aq)+H2(g)
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Chemistry

03/22/23

If 50 ml of water at 85 degrees C are added to 100ml of water at 25 degrees C what would be the final temperature of the water assuming that no heat is lost to surroundings?
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Chemistry

03/22/23

Determine the molecular weight of the vapour.
A 256.0 cm^3 flask is filled with a vapour at 97.325 KPa and 100 C. The mass of the vapour is 1.675 g. Determine the molecular weight of the vapour. Use R = 8.314 JK^-1mol^-1.
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Chemistry

03/22/23

Determine the formula of the hydrate.
A hydrate of barium chloride, BaCl2nH2O, weighing 1.222 g was heated until all the combined water was expelled. The dry powder remaining weighed 1.042 g.Determine the formula of the hydrate.
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Chemistry

03/22/23

Calculate the percentage elemental composition of the confiscated substance.
A white substance had been confiscated on suspicion that it was cocaine. A forensic chemist purified the substance and subjected it to elemental analysis. Combustion of a 50.86 mg sample yielded... more
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Chemistry

03/22/23

The compound methyl benzoate is used in the manufacture of perfumes. ...
The compound methyl benzoate is used in the manufacture of perfumes. In oneexperiment, it is found to consist of 70.58% C, .93% H and 23.49% O, by mass. Whatis the empirical formula of this... more
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Chemistry

03/22/23

A student collects 500 cm^3 of methane gas at STP. Determine the moles of gas present, the number of methane molecules and the mass of methane.
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Chemistry

03/22/23

How many grams of PCl3 are produced with 6.2g of chlorine gas reacting with excess phosphorous?
P4 + 6Cl2 ---> 4PCl3
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Chemistry

03/21/23

pH of the solution

A solution contains 0.228 M C2H5NH3Br and 0.126 M ethylamine , C2H5NH2 .What is the pH?
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03/21/23

A scuba diver ascends too quickly and develops the bends.

A scuba diver ascends too quickly and develops the bends. A nitrogen bubble has formed in the patient's elbow. At a depth of 55 ft,55 ft, where the pressure is 2.66 atm,2.66 atm, the bubble had a... more
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Chemistry

03/21/23

Identify the reactant that gets oxidized in the following reaction. 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)
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Chemistry

03/21/23

chemistry 11 grade
A gas a pressure of 0.410 atm and volume of 32L. At what pressure would the volume of the gas change to 28L?
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Chemistry

03/21/23

Ap Chemistry Unit 8.03 Question
A 0.1931mol sample of dry ice, CO2(s) is added to an empty balloon. After the balloon is sealed, the CO2(s) sublimes and the CO2(g) in the balloon eventually reaches a temperature of 21.0°C and... more
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Chemistry

03/21/23

chemistry 11 grade
0.465 mole sample of gas everts 4.43 atm of pressure in a 2.25 L container. What is temperature of the gas un the container ?
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Chemistry

03/21/23

Equilibrium Shift
4 NH3(g) + 5 O2(g) ↔ 4 NO(g) + 6 H2O(g) ΔH = -904.4 kJ How does each of the following changes affect the yield of NO at equilibrium? Answer increase, decrease, or no change: a) increase [NH3]; b)... more
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Chemistry

03/21/23

Is it at equilibrium
Consider the reaction: 2 H2S(g) ↔ 2 H2(g) + S2(g) Kp = 2.4x10-4 A reaction mixture contains 0.112 atm of H2, 0.055 atm of S2, and 0.445 atm of H2S. is he reaction mixture at equilibrium? In not,... more
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Chemistry

03/21/23

Equilibrium Constant
Consider the reaction: SO2Cl2(g) ↔ SO2(g) + Cl2(g) A reaction mixture is made containing an initial [SO2Cl2] of 0.020M. At equilibrium, [Cl2] = 1.2x10-2M. Calculate the value of the equilibrium... more
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