Imagine that you have a 6.50 gas tank and a 4.00

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Get college assignment help at uniessay writers Imagine that you have a 6.50 gas tank and a 4.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 155 , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.

a)If 50. ml of 0.300M HCl are titrated with 0.150M NaOH,

a)If 50. ml of 0.300M HCl are titrated with 0.150M NaOH, what is the pH at the equivalence point? b)If 50. ml of 0.30M HCN are titrated with 0.30M NaOH, what is the pH at the equivalence point? Note: Ka for HCN is 6.17×10-10 c)In which type of titrations can buffering regions occur? Check all answers that are correct. Strong acid/strong base titrations Strong acid/weak base titrations Weak acid/strong base titrations

If solar radiation is 1000 , how many photons strike the

If solar radiation is 1000 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 for solar radiation.

You have 500.0 mL of a buffer solution containing 0.20 M

You have 500.0 mL of a buffer solution containing 0.20 M acetic acid (CH3COOH) and 0.30 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 20.0 mL of 1.00 M NaOH solution? [Ka = 1.8 × 10-5]

increasing order of mass(smallest to largest)

increasing order of mass(smallest to largest)

Lead(II) sulfide was once used in glazing earthenware. It will also

Lead(II) sulfide was once used in glazing earthenware. It will also react with hydrogen peroxide (H2O2)to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?

For the reaction 2 SO3(g) —> 2 SO2(g) O2(g) /_H◦

For the reaction 2 SO3(g) —> 2 SO2(g) O2(g) /_H◦ r = 198 kJ · mol−1 and /_S◦ r = 190 J · K−1 · mol−1 at 298 K. The forward reaction will be spontaneous at 1. no temperature. 2. temperatures above 1042 K. 3. temperatures above 1315 K. 4. all temperatures. 5. temperatures below 1042 K.

For the decomposition of ammonia to nitrogen and hydrogen, the equilibrium

For the decomposition of ammonia to nitrogen and hydrogen, the equilibrium constant is 1.47 × 10^−6 at 298 K. Calculate the temperature at which K = 0.01. For this reaction, /_H◦ = 92.38 kJ · mol−1. 1. 241 K 2. 468 K 3. 332 K 4. 59 K 5. 117 K 6. 390 K

How much heat is evolved when 370. g sulfur dioxide is

How much heat is evolved when 370. g sulfur dioxide is produced

How many unpaired electrons in the F22 ion are based on

How many unpaired electrons in the F22 ion are based on molecular orbital theory? The order of the molecular orbitals are (σ2s)(σ*2s)(σ2p)(π2p)(π*2p)(σ*2p).

1) Choose the best answer for the central location of the

Get college assignment help at uniessay writers 1) Choose the best answer for the central location of the buffering region. a)The buffering region is determined by the existence of a balance of weak conjugate base and weak acid. This region is centered about a point halfway between the start and the equivalence point in the titration but does not extend all the way to the beginning of the titration or all the way to the equivalence point. b)The buffering region is centered at the equivalence point since that is where there is the best buffering point. c)Since the buffering region extends from the starting point in the titration to the equivalence point, the center of the region is halfway between these points. 2)Two groups each start with 40 ml of 0.10M HCl in their titration beakers. Before they start the titration, one group adds an additional 40 ml of deionized water to their titration beaker and the other group adds an additional 100 ml of deionized water to their titration beaker. Which value(s) will be different for the two groups? a)The number of milliliters of 0.20M NaOH needed to reach the equivalence point. b)The pH at the start of the titration, before any NaOH has been added. c)The pH when 10 ml of 0.20 M NaOH has been added. d)The pH at the equivalence point. 3)Two groups each start with 40 ml of 0.10M acetic acid in their titration beakers. Before they start the titration, one group adds an additional 40 ml of deionized water to their titration beaker and the other group adds an additional 100 ml of deionized water to their titration beaker. Which value(s) will be different for the two groups? a)The pH at the equivalence point. b)The pH at the start of the titration, before any NaOH has been added. c)The pH when 10 ml of 0.20 M NaOH has been added. d)The number of milliliters of 0.20M NaOH needed to reach the equivalence point.

How many grams of water are needed to react with 0.371

How many grams of water are needed to react with 0.371 mol of ethylene?

The experimental bond length in bismuth triiodide,Bi_I , is 2.81 .

The experimental bond length in bismuth triiodide,Bi_I , is 2.81 . Based on this value and data in Figure7.7 in the textbook, predict the atomic radius of Bi .

If you are given a 0.31 g piece of sodium metal

If you are given a 0.31 g piece of sodium metal to react with water, how many moles of HCl would it take to neutralize the sodium hydroxide produced?

At STP, 12.69 g of a noble gas occupies 14.09 L.

At STP, 12.69 g of a noble gas occupies 14.09 L. What is the identity of the noble gas?

how much heat energy, in calories, is absorbed when 88.0 ml

how much heat energy, in calories, is absorbed when 88.0 ml of water is heated from 5°C to 37°C?

A gas is placed in a storage tank at a pressure

A gas is placed in a storage tank at a pressure of 20 atm at 20.3 C there is a small metal plug in the tank made of a metal alloy that melts at 125C what is the maximum pressure in the tank?

Why doesn’t the neutral organic compound dissolve in 1.5 M sodium

Why doesn’t the neutral organic compound dissolve in 1.5 M sodium hydroxide solution?

A cylinder with a moveable piston contains 0.75 {rm mol} of

A cylinder with a moveable piston contains 0.75 {rm mol} of gas and has a volume of 344 {rm mL}. What will its volume be if an additional 0.30 {rm mol} of gas is added to the cylinder? (Assume constant temperature and pressure.)

10 ml of a silver nitrate solution is titrated to the

10 ml of a silver nitrate solution is titrated to the equivalence point with 8.5 ml of a .1100 M HCL solution. What is the concentration of the silver nitrate?

(a) If 2.20 g of copper(II) chloride dihydrate is reduced by

(a) If 2.20 g of copper(II) chloride dihydrate is reduced by Mg(s), what is the minimum mass of Mg(s) required for this reduction? g Mg (b) The mass you will use in the lab is in excess of the minimum required. What happens to the unused excess Mg(s)? The solution is heated to remove the excess Mg(s) The excess Mg(s) reacts with the copper compound produced from the original reduction reaction Additional HCl(aq) is added and this reacts with Mg(s) to form Mg2 (aq) Nothing happens to the excess Mg(s) The excess is removed as Mg(s), after all Cu(s) and Mg(s) do not look the same

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