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General Chemistry

01/17/20

Acid Base Titaration

You carry out the titration of a weak diprotic solid acid. You take 0.178 g of the solid acid and dissolve it in about 50 mL of distilled water. You titrate with 0.1005 M NaOH and arrive at the... more

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General Chemistry

01/17/20

Le Chatelier’s Principle and Chemical Equilibrium

The oxidation of NO to NO2 is exothermic.2 NO(g) + O2(g) -----> 2 NO2(g)If the system is at equilibrium and the temperature is increased, will the concentration of NO increase, remain the same... more

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General Chemistry Chemistry

01/17/20

Le Chatelier’s Principle and Chemical Equilibrium

Nitrosyl bromide, NOBr(g), decomposes according to the equationNOBr(g) -------> NO(g)+ ½ Br2(g)a. If the equilibrium constant Kp= 0.15 at 350oC, will any net reaction occur if 1.2 atm NOBr, 0.7... more

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General Chemistry Chemistry

01/17/20

Freezing Point Depression

Calculate the freezing point of a solution containing 600 g of chloroform and 42.0 g of eucalyptol (C10H18O), a fragrant substance found in the leaves of eucalyptus trees. Chloroform has a normal... more

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General Chemistry Chemistry Solution Molarity

11/14/19

Chemistry: Molarity

Calculate the molarity of each of the following solutions: (a) 293g HCl in 666mL of solution, a concentrated HCl solution(b) 2.0226 g FeCl3 in 0.1250L of a solution used as an unknown in general... more

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General Chemistry Chemistry Chem 101

11/12/19

Molecular Shape of O3?

Help! I though trigonal planar was right, but it was wrong.What is the molecular shape of O3?lineartetrahedraltrigonal planartrigonal pyramidbent (or V-shaped)

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General Chemistry Chemistry College Chemistry Chem 101

11/12/19

Electron Pair Arrangements?

Select the following molecular structures which can arise from a tetrahedral electron pair arrangement.Select all that are true. trigonal planar T-shaped trigonal pyramid octahedral square planar

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General Chemistry Chemistry Chemical Reactions Hydrates

11/05/19

mixture of MnSO4 and MnSO44H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO44H20 are present in the mixture?

A mixture of MnSO4 and MnSO4*4H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO4*4H20 are present in the mixture? What is the mass... more

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General Chemistry Chemistry College Chem101

11/05/19

True or False about Electrons

Select true or false for each statement below. True False Electrons move in elliptical orbits around the nucleus of an atom. True False The energy levels of all atoms are... more

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General Chemistry Chemistry Chemistry 151

10/26/19

A 1445 kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?

It also requests that Ek = answer = kJ. How would I convert that?

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General Chemistry Chemistry Chemistry 151

10/26/19

If 5.100 g C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 ∘ C, what is the final temperature of the water?

The balanced combustion reaction for C6H6 is 2C6H6(l)+15O2(g)⟶12CO2(g)+6H2O(l)+6542 kJ

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General Chemistry Chemistry Chemistry College

10/22/19

Stoichometry Chemistry Question About Concentration Ions

You react 100.0 mL of 0.100 M lead(II) nitrate with 200.0 mL of 0.250 M potassium iodide. What is the concentration of I− ions left in solution after the reaction is... more

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General Chemistry Chemistry Stoichiometry College

10/15/19

Help! Chemistry Stoichiometry Question

I figured out how to balance this equation, and I think I figured out the answer to question number 1 for mass (I got 33.2 g of sodium carbonate), but how do you find the ions that are not... more

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General Chemistry Chemistry Neutralization

10/07/19

Neutralization Reaction

Write the balanced neutralization reaction that occurs between H2SO4 and KOH in aqueous solution. Phases are optional. neutralization reaction:Suppose 0.750 L of 0.480 M H2SO4 is mixed... more

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General Chemistry Chemistry College College Chemistry

10/03/19

Finding Grams of Complete Reaction

I found the balanced equation : 4C + S8 = 4CS2, but I am confused about how to find the grams.Any help is greatly appreciated!Consider the following unbalanced reaction: C(s) + S8(s) → CS2(l) How... more

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General Chemistry Science Chemistry

10/03/19

Solution Stoichiometry: Precipitation Calculation

Calculate the number of milliliters of 0.732 M KOH required to precipitate all of the Pb2+ ions in 125 mL of 0.905 M Pb(NO3)2 solution as Pb(OH)2. The equation for the reaction is:Pb(NO3)2(aq)... more

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General Chemistry Chemistry

09/29/19

Chemistry Limiting Reagent

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3 + 2HCl CaCl2 + H2O + CO2How many grams of calcium chloride will be produced... more

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General Chemistry Chemistry Organic Chemistry

09/27/19

A concentrated solution of HF has a molarity of 8.25 M. You add 23.50 mL to a flask and then dilute with water. The mass of the final solution is 125.0 g. What is the mass percent of HF ?

I can't figure it out. Please help, thank you

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General Chemistry Chemistry

03/30/19

Student A weight 0.747 g of KHP on a laboratory balance.

Student A weight 0.747 g of KHP on a laboratory balance. The KHP was titrated with an unknown NaOH solution and the concentration of the NaOH was determined to be 0.113 M. Student B diluted 6 M HCl... more

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General Chemistry Chemistry

02/19/19

Homework problem

Aluminum has a density of 2.71 g/mL. Calculate the VOLUME occupied by 0.52 grams of aluminum foil.

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General Chemistry Electrochemistry

11/17/18

Electrochemistry: How much zinc is consumed and how much copper is deposited if a current of 1.0 A flows for 1.0 hour?

How much zinc is consumed and how much copper is deposited if a current of 1.0 A flows for 1.0 hour?

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General Chemistry

11/08/18

Of the molecules below, only __________ is polar. CCl4 CH4 CH3Cl SiCl4 I2

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General Chemistry

11/08/18

Of the molecules below, only __________ is polar. BF3 NH3 I2 CO2 CCI4

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General Chemistry

11/08/18

The hybridization of two atomic orbitals results in the formation of __________ molecular orbitals. 1 2 3 4 0

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General Chemistry

11/08/18

The electron-domain geometry of __________ is tetrahedral. SO2 SO3 SnCl3- XeF4 All of the above

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Acid Base Titaration

Le Chatelier’s Principle and Chemical Equilibrium

Le Chatelier’s Principle and Chemical Equilibrium

Freezing Point Depression

Chemistry: Molarity

Molecular Shape of O3?

Electron Pair Arrangements?

mixture of MnSO4 and MnSO4*4H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO4*4H20 are present in the mixture?

True or False about Electrons

A 1445 kg car is traveling down the road at 90.6 km/h. While traveling at this rate of speed, what is the kinetic energy of this vehicle in kilojoules?

If 5.100 g C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 ∘ C, what is the final temperature of the water?

Stoichometry Chemistry Question About Concentration Ions

Help! Chemistry Stoichiometry Question

Neutralization Reaction

Finding Grams of Complete Reaction

Solution Stoichiometry: Precipitation Calculation

Chemistry Limiting Reagent

A concentrated solution of HF has a molarity of 8.25 M. You add 23.50 mL to a flask and then dilute with water. The mass of the final solution is 125.0 g. What is the mass percent of HF ?

Student A weight 0.747 g of KHP on a laboratory balance.

Homework problem

Electrochemistry: How much zinc is consumed and how much copper is deposited if a current of 1.0 A flows for 1.0 hour?

Of the molecules below, only __________ is polar. CCl4 CH4 CH3Cl SiCl4 I2

Of the molecules below, only __________ is polar. BF3 NH3 I2 CO2 CCI4

The hybridization of two atomic orbitals results in the formation of __________ molecular orbitals. 1 2 3 4 0

The electron-domain geometry of __________ is tetrahedral. SO2 SO3 SnCl3- XeF4 All of the above

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mixture of MnSO4 and MnSO44H20 has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. How many grams of MnSO44H20 are present in the mixture?