264 Answered Questions for the topic chem

Concentration of sulfuric acid after neutralization

Write the balanced neutralization reaction that occurs between H2SO4 and in KOH aqueous solution. Phases are optional.Suppose 0.250 L of 0.500 M of H2SO4 is mixed with 0.200 L of 0.240 M KOH. What... more

Net ionic equation

Write the net ionic equation for the chemical reaction shown. Include physical states.HClO2(aq)+NaOH(aq)⟶H2O(l)+NaClO2(aq)
Chem Chemistry

5d

PLzz helppp i only kno how to balance them

Balance the following, identify the solid, liquid, or gas produced and find the net ionic equation for the following. 1. CuCl2 + K3PO4 --> KCl + Cu3PO42. H2SO4 + NaOH --> Na2SO4 + H2O3.... more

Which of the solutions (A, B, or C) will have the highest freezing point?

Consider the following four solutions:(A) 0.175 moles of KClKClin 1.250 kg of water (B) 0.175 moles of C6H12O6C6​H12​O6​(glucose) in 0.750 kg of water (C) 0.075 moles of Ca(NO3)2Ca(NO3​)2​in 0.950... more
Chem Chemistry

6d

Charles laww helpp plzz

1) A sample of gas occupies 6.74 L at 325oC, what will its volume be at 25.0oC if the pressure does not change?2) A balloon is inflated at room temperature of 22.0oC and has a volume of 3.86 L. ... more

College Chemistry Question

10. Write how many electrons each of the following can accept at the most:subshell 2s: ___ shell 1: ___ one 4f orbital: ___ subshell 5p: ___11. For an atom of 13Al, write its full electron... more

Propose structures for A, B and C that are consistent with these data.

Unknown A has a molecular formula of C10H20. Reaction of A with H2 over Pt/C gives compound B with a formula of C10H22. Reaction of A with CH2I2, Zn(Cu) gives a compound C (C11H22) that contains a... more

What is the concentration of Cu^{2+} in the resulting solution?

23.6 mL of 0.141 M copper(II) sulfate reacts with 15.9 mL of 0.114 M sodium hydroxide to form a precipitate (Cu(OH)). What is the concentration of Cu in the resulting solution?Thank you!
Chem Chemistry

9d

Calculate the vapor pressure of the resulting ethylene glycol solution.

107.1 g of non-volatile ethylene glycol (62.07 g mol ) is added to 336 g of water at room temperature. The vapor pressure of water at room temperature is 23.76 Torr. Calculate the vapor pressure of... more

For a certain reaction, K⁰ = 1.2 × 104 at 25 °C, and K⁰ = 4.3 × 103 at 125 °C

12. For a certain reaction, K⁰ = 1.2 × 104 at 25 °C, and K⁰ = 4.3 × 103 at 125 °C. (a) Is this reaction endothermic, or is it exothermic? (b) Calculate ΔHr⁰.14. For the reaction in exercise 12,... more

At a certain temperature, an equilibrium mixture in a 1.00 L container consists of 0.00400 M PCl5(g), 0.100 M PCl3(g), and 0.200 M Cl2(g).

6.) At a certain temperature, an equilibrium mixture in a 1.00 L container consists of 0.00400 M PCl5(g), 0.100 M PCl3(g), and 0.200 M Cl2(g). (a) Calculate KC for PCl5(g) ⇌ PCl3(g) + Cl2(g); (b)... more

At a certain temperature, an equilibrium mixture in a 1.00 L container consists of 0.245 M H2(g), 0.199 M I2(g), and 1.563 M HI(g).

(a) Calculate KC for H2(g) + I2(g) ⇌ 2HI(g); (b) An additional 0.500 mol of H2(g) is added to the container. Calculate the new equilibrium concentrations.

At 377 °C, KC = 0.0111 M for PCl5(g) ⇌ PCl3(g) + Cl2(g).

At 377 °C, KC = 0.0111 M for PCl5(g) ⇌ PCl3(g) + Cl2(g). Into a 2.00 L flask are placed 0.120 mol PCl5, 0.0600 mol PCl3, and 0.0400 mol Cl2. Are the contents of the flask at equilibrium? If not,... more

2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.  

2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.   Write a balanced chemical equation, including states of all reactants and products. Write a net ionic equation. Determine... more

20d

Which of the following solutions would have the lowest freezing point?

a. 0.10 M lithium chlorideb. 0.15 M barium nitratec. 0.20 M potassium iodided. 0.25 M sodium nitratee. 0.20 M calcium bromide

General Chemistry

What is the final sodium ion concentration when 35.0 ml of 0.150 M NaCl is mixed with 75.0 of 0.050 M Na2SO4 and 20.0 ml of 0.100 M KCI?

General Chemistry

What volume of CO2 gas is produced when 5.00 kg of pure iron metal is formed and the gas volume is measured at 10.0 atm and 450 degree C?

General Chemistry

what is the molarity of a solution made by dissolving 12.5 grams of potassium chromate in enough water to form 225 ml of solution?Then give the molarity for the cation.Please include steps

General Chemistry

35.0 ml of a 1.25 sodium hydroxide solution is diluted with water to a final volume of 55.0 ml. What is the new molarity?

General Chemistry

What volume of 0.350 M sodium iodide could be prepared with 50.0 grams of the pure solid? Include steps please.

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