05/26/21

How many moles of nitrogen gas will occupy a volume of 8.3 L at 720 mmHg and 27oC?
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05/26/21

Chem 30 - The Constant Equilibrium
Once you have balanced the following chemical equation, choose the correct corresponding equilibrium law expression:Ag2CO3(s)  ↔ Ag(s)  + CO2(g)  + O2(g) Kc=?Once you have balanced the following... more
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05/26/21

Nickel is more reactive than hydrogen, so it replaces hydrogen from hydrochloric acid when mixed together. Write a balanced chemical equation for this chemical change.
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05/25/21

What is the balanced chemical equation for the following chemical reaction? Copper (ii) oxide when heated in the presence of methane (CH4) gas produces copper, carbon dioxide and water vapor.
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05/25/21

Write the electrolytic dissociation
Write the electrolytic dissociationof of the following acids and name the anions :Nitric acid Sulfuric acidPhosphoric acid Carbonic acid
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05/25/21

a) Explain why fluorine has a smaller atomic radius than oxygen. b) Explain why fluorine has a smaller atomic radius than chlorine.
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05/24/21

Acetylene, C2H2, combusts in the presence of oxygen to form carbon dioxide and steam as shown in the following reaction.

2 C2H2 + 5 O2 → 4 CO2 + 2 H2O ΔH° = -2511.6 kJ/molrxnCalculate the amount of energy released when 39.0 g C2H2 reacts with excess oxygen.
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05/24/21

A product formed from the thermochemical reaction when 3 moles of methane burn in the presence of oxygen.

Include the thermochemical equation with the energy change and describe the impact the gaseous product could have on the environment.
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05/24/21

An aqueous solution has a freezing point of -13.8 ∘C, what is the boiling point of the solution? The Kf value for water is 1.86 ∘C/m, and the Kb value for water is 0.520 ∘C/m.
An aqueous solution has a freezing point of -13.8 C, what is the boiling point of the solution? The Kf value for water is 1.86 C/m, and the Kb value for water is 0.520 C/m.
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05/24/21

The total pressure in a tank is filled with a mixture of gases : Oxygen, Helium, and Argon is 15.3 atm. The P(He) = 3.2 atm, P(O) = 7.4 atm, what is the P(Ar) in the tank?
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05/23/21

Which has the largest radius?

Ne, F-, Na+Which has the largest and smallest radius? Does the charge make a difference in radius size?
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05/22/21

Please help me with these Chemistry questions.

How are organic compounds classified?a. by the presence or lack of benzene ringsb. by the number of branches they containc. by the number of hydrogens bonded to the parent chaind. by their... more
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05/22/21

Given the generic equation below, add the word “Energy” to the proper side to indicate an exothermic reaction. A + B 🡪 C + D
Given the generic equation below, add the word “Energy” to the proper side to indicate an exothermic reaction. Then do one for the endothermic Reaction.A + B 🡪 C + D
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05/22/21

I need help solving with jules. Please and thank you!
40g of water is placed in a calorimeter at an initial temperature of 20.2˚C. After the addition of a sample of warm metal, the final temperature of the water is 23.6˚C. How much heat did the water... more
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05/22/21

I need help solving this question. Please and thank you!
A 12g sample of hot metal is placed in a calorimeter with a known mass of water. It is determined that the metal releases -50J of heat in the process. The change in temperature of the metal (∆T) is... more
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05/21/21

science help needed

Julie noticed on the campout that Terry’s face had darkened from the sun. She learned that every time we are out in the sun, our bodies make Vitamin D. The Vitamin D made by the body is considered... more
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05/21/21

good explanation needed! im confused

 Gummy Worms are a synthetic material, made when two chemicals, sodium alginate and calcium chloride, are mixed and allowed to react. Sodium alginate is isolated from seaweed. The other ingredient,... more
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05/21/21

chemistry question
If 128 grams of CH4 and 160 grams of O2 react, how many miles of CO2 will form. What would be the limiting reactant/excess reactant and the theoretical yield?
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05/21/21

A gas occupies 900.0 mL at a temperature of 27.0 °C. What is the volume at 132.0 °C? (1215 mL)
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05/21/21

how many grams of acetylene could be burned by 16.0 g of oxygen
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05/21/21

If you have 3 moles of I2, how many moles of NaI will you make in this reaction? 2Na + I2 -> 2NaI
If you have 3 moles of I2, how many moles of NaI will you make in this reaction?2Na + I2 -> 2NaI
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05/20/21

Calculate the delta H for Y + XZ = XY + Z
Given the following data:X + Y = XY delta H= a kJX + Z = XZ delta H= b kJ
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05/20/21

The final temperature of the calorimeter was 17.7 o C. What was the initial temperature of the iron?
A 26.0 g piece of iron (s = 0.46 J/g • 0C) is placed in a calorimeter with 200.0 g of water at 16.0 0 C. The final temperature of the calorimeter was 17.7 o C. The specific heat of water is 4.184... more
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05/20/21

What is the change in enthalpy when 11.8g of iron reacts with 2.7 L of O2 (at STP) according to the following equation?
What is the change in enthalpy when 11.8g of iron reacts with 2.7 L of O2 (at STP) according to the following equation? Hint: 1 mol of any gas at STP = 22.4 L3Fe + 2O2  → Fe3O4    ∆Ho = -1120.48kJ
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05/20/21

I don't understand can someone help me?
An 8.0-g piece of iron absorbs 1000 joules of heat energy, and its temperature changes from 25°C to 75°C. Calculate the specific heat capacity of iron.  
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