J.R. S.

11/14/20

A sample of an ideal gas has a volume of 2.27 L at 283 K and 1.14 atm. Calculate the pressure when the volume is 1.85 L and the temperature is 304 K.

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11/13/20

A liquid is exposed to infrared radiation with a wavelength of 6.61×10−4 cm.

Assume that all the radiation is absorbed and converted to heat. How many photons are required for the liquid to absorb 45.33 J of heat?

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Chemistry Chemical

11/13/20

How to solve this chemistry question?

Q1. Decomposition of H2O2 is shown below2H2O2 (l) ----------> 2H2O (l) + O2 (g)At the end of the reaction, 0.75 L of gas was collected over water at 25 °C and the total pressure measured was... more

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Chemistry

11/13/20

Enthalpy of Formation

A scientist measures the standard enthalpy change for the following reaction to be -237.2 kJ :2SO2(g) + O2(g)2SO3(g)Based on this value and the standard enthalpies of formation for the other... more

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Chemistry Chemical

11/13/20

How to solve this chemistry question?

Q. Sodium hydroxide (4.00 g) and water (100.0 g) are both at 20.0 °C. When the sodium hydroxide is dissolved in the water using a coffee cup calorimeter, the solution’s temperature reached a... more

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Chemistry

11/13/20

Hi, have I done the following question correctly?Write a protolytic reaction where HPO42- is shown as a a) acidb) basea) I look at the table of base constants and chose a base with higher base... more

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Chemistry Base Acid And Base

11/13/20

A 1.00 liter solution contains 0.53 M hypochlorous acid and 0.40 M potassium hypochlorite.

If 35.0 mL of water are added to this system, indicate whether the following statements are true or false.(Note the the volume MUST CHANGE upon the addition of water.)A. The concentration... more

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Chemistry Organic Chemistry

11/13/20

Question in Description

Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous... more

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Chemistry

11/13/20

The specific heat of a certain type of metal is 0.128 J/(g^ C) What is the final temperature if 305 of heat is added to 65.3g of this metal initially at 20.0 degrees * C

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Chemistry

11/13/20

what is the percent yield of the reaction?

If 4.66 g of sodium carbonate is recovered from the decomposition of 1.49 g of sodium bicarbonate, what is the percent yield of the reaction? (Note: I messed up on this problem and the percent... more

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Chemistry

11/13/20

Cm-248 undergoes spontaneous radioactive decay by alpha submission. What is the resulting nuclide? Answer using the original isotope notation you learned (C-14, Ba-137, etc..)

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Chemistry

11/12/20

i need help on this Chemistry

3. Consider the diagram “A” above. Is energy absorbed or released for the electron transition shown? Explain.4. Which of the diagrams above depicts an electron transition involving the most energy?... more

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Science Chemistry

11/12/20

A solution of 7.50 g of a nonvolatile molecular compound in 22.6 g of water boils at 100.78°C. What is the molar mass of the solute? (kb = 0.52°C/m)

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Chemistry

11/12/20

What is the minimum volume of CuNO3 should be used in this reaction?

The following reaction is known to have a 65.0% yield of iron.3 Cu(NO3)2(aq) + 2 Fe -> 2 Fe(NO3)2(aq) + 3 CuTo produce 25.0 g of copper, what is the minimum volume of CuNO3 should be used in... more

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Chemistry

11/12/20

What is the freezing point of a solution that has 5.00 moles of NaI in 1250 g of water? (kf = 1.86oC/m)

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Chemistry

11/12/20

Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities?

Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities?a) c(A) > c(B)b) c(B) >... more

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Chemistry

11/12/20

100.0 mL of a 0.250 mol/L solution of barium nitrate reacts with 150.0 mL of a 0.125 mol/L solution of sodium phosphate. What is expected mass of the precipitate that is formed?

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Chemistry

11/12/20

How many moles of helium (He) gas are there in 1927 liters at STP?

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Chemistry

11/12/20

Equilibrium of H2 Br2 and HBr

What’s the equilibrium concentrations of H2 Br2 and HBr

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Chemistry Grams

11/12/20

How many grams are in a neon sign

A neon sign has a diameter of 2.5cm and length at 5.5m. If the sign contains neon at 1.78torr at 35 degrees, how many grams of neon are in the sign

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Chemistry

11/12/20

What mass of zinc is required to completely react with 250 mL of H2SO4 with a concentration of 0.150 M?

Zn(s) + H2SO4(aq) ZnSO4(aq) + H2(g)What mass of zinc is required to completely react with 250 mL of H2SO4 with a concentration of 0.150 M?

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Chemistry

11/12/20

How can chloric acid (HClO3) act as an Arrhenius acid when dissolved in water?

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Chemistry

11/11/20

Write the Kc expression for each of the following equilibrium reactions.

a) 2 O3 (g) 3 O2 (g) b) 2 SO2 (g) + O2 (g) 2 SO3 (g)

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Chemistry

11/11/20

42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl

42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl. The equation for the precipitate reaction is Pb(NO3)2 (aq) + 2NaCl(aq)—->PbCl 2 (s)+2 NaNO 3 (aq) The concentration... more

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Chemistry

11/11/20

The half-life of Strontium-90 is 28.79 years. If a sample ends with 4.70 mg, how many mg will was at the beginning if deteriated 177.7 years? mg

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Answers •2

A sample of an ideal gas has a volume of 2.27 L at 283 K and 1.14 atm. Calculate the pressure when the volume is 1.85 L and the temperature is 304 K.

A liquid is exposed to infrared radiation with a wavelength of 6.61×10−4 cm.

How to solve this chemistry question?

Enthalpy of Formation

How to solve this chemistry question?

Protolysis reaction

A 1.00 liter solution contains 0.53 M hypochlorous acid and 0.40 M potassium hypochlorite.

Question in Description

The specific heat of a certain type of metal is 0.128 J/(g^ C) What is the final temperature if 305 of heat is added to 65.3g of this metal initially at 20.0 degrees * C

what is the percent yield of the reaction?

Cm-248 undergoes spontaneous radioactive decay by alpha submission. What is the resulting nuclide? Answer using the original isotope notation you learned (C-14, Ba-137, etc..)

i need help on this Chemistry

A solution of 7.50 g of a nonvolatile molecular compound in 22.6 g of water boils at 100.78°C. What is the molar mass of the solute? (kb = 0.52°C/m)

What is the minimum volume of CuNO3 should be used in this reaction?

What is the freezing point of a solution that has 5.00 moles of NaI in 1250 g of water? (kf = 1.86oC/m)

Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities?

100.0 mL of a 0.250 mol/L solution of barium nitrate reacts with 150.0 mL of a 0.125 mol/L solution of sodium phosphate. What is expected mass of the precipitate that is formed?

How many moles of helium (He) gas are there in 1927 liters at STP?

Equilibrium of H2 Br2 and HBr

How many grams are in a neon sign

What mass of zinc is required to completely react with 250 mL of H2SO4 with a concentration of 0.150 M?

How can chloric acid (HClO3) act as an Arrhenius acid when dissolved in water?

Write the Kc expression for each of the following equilibrium reactions.

42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl

The half-life of Strontium-90 is 28.79 years. If a sample ends with 4.70 mg, how many mg will was at the beginning if deteriated 177.7 years? mg

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Emmersion

A sample of an ideal gas has a volume of 2.27 L at 283 K and 1.14 atm. Calculate the pressure when the volume is 1.85 L and the temperature is 304 K.

A liquid is exposed to infrared radiation with a wavelength of 6.61×10−4 cm.

How to solve this chemistry question?

Enthalpy of Formation

How to solve this chemistry question?

Protolysis reaction

A 1.00 liter solution contains 0.53 M hypochlorous acid and 0.40 M potassium hypochlorite.

Question in Description

The specific heat of a certain type of metal is 0.128 J/(g*^ * C) What is the final temperature if 305 of heat is added to 65.3g of this metal initially at 20.0 degrees * C

what is the percent yield of the reaction?

Cm-248 undergoes spontaneous radioactive decay by alpha submission. What is the resulting nuclide? Answer using the original isotope notation you learned (C-14, Ba-137, etc..)

i need help on this Chemistry

A solution of 7.50 g of a nonvolatile molecular compound in 22.6 g of water boils at 100.78°C. What is the molar mass of the solute? (kb = 0.52°C/m)

What is the minimum volume of CuNO3 should be used in this reaction?

What is the freezing point of a solution that has 5.00 moles of NaI in 1250 g of water? (kf = 1.86oC/m)

Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities?

100.0 mL of a 0.250 mol/L solution of barium nitrate reacts with 150.0 mL of a 0.125 mol/L solution of sodium phosphate. What is expected mass of the precipitate that is formed?

How many moles of helium (He) gas are there in 1927 liters at STP?

Equilibrium of H2 Br2 and HBr

How many grams are in a neon sign

What mass of zinc is required to completely react with 250 mL of H2SO4 with a concentration of 0.150 M?

How can chloric acid (HClO3) act as an Arrhenius acid when dissolved in water?

Write the Kc expression for each of the following equilibrium reactions.

42.7 mL of aqueous 0.255 M Pb(NO3)2 is mixed with 21.7 of mL of 0..415 M NaCl

The half-life of Strontium-90 is 28.79 years. If a sample ends with 4.70 mg, how many mg will was at the beginning if deteriated 177.7 years? mg

Still looking for help? Get the right answer, fast.

OR

J.R. S.

The specific heat of a certain type of metal is 0.128 J/(g^ C) What is the final temperature if 305 of heat is added to 65.3g of this metal initially at 20.0 degrees * C