215 Answered Questions for the topic General Chemistry

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

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

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

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

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

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)

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

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?

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

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

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

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

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

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

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

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

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

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

Homework problem

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

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?

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

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

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

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 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

The electron-domain geometry of __________ is tetrahedral. SO2 SO3 SnCl3- XeF4 All of the above
1 3 4 5 6 7 8 9

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