Q5) Consider the combustion reaction between 13 ethane molecules and 42 oxygen molecules. Identify the limiting reactant. (Chapter 3)
A) water
B) ethane
C) none of the above
D )carbon dioxide
E) oxygen
Q7) Determine the molarity of a calcium hydroxide (molar mass: 74.10 g/mol) solution if 34.53 mL of the calcium hydroxide solution is required to neutralize 15.41 mL of a 2.456 M hydrochloric acid (molar mass: 36.46 g/mol) solution.
A)1.096 M
B)none of the above
C)5.480 × 10-4 M
D)0.5480 M
E)1.096 × 10-3 M
Q9) In which of the following orbitals does an electron in a rubidium atom experience the least effective nuclear charge?
A)2p
B)5s
C)7s
D)4d
E)3s
Q10) Using Lewis structures, determine the number of sigma (σ) and pi (π) bonds are there in a carbon dioxide molecule?
A) 1 σ and 2 π bonds
B) 2 σ and 2 π bonds
C) 3 σ bonds
D) 1 σ and 1 π bonds
E) none of the above
Q12) Using the Lewis structures for a carbon dioxide molecule and a carbonate ion, which of the following statements is true?
A) A carbonate ion has two different carbon-oxygen bond lengths, where one of the carbon-oxygen bonds is the same length as the carbon-oxygen bond in a carbon dioxide molecule.
B) A carbon dioxide molecule has two carbon-oxygen bond lengths, where one of the carbon-oxygen bonds is the same length as the carbon-oxygen bond in a carbonate ion.
C) none of the above predictions are true
D) All of carbon-oxygen bonds in a carbonate ion are shorter than the carbon-oxygen bonds in a carbon dioxide molecule.
E) All of the carbon-oxygen bonds in a carbonate ion are weaker than the carbon-oxygen bonds in a carbon dioxide molecule.
Q19) Calculate the number of grams of sodium hydroxide (molar mass: 40.00 g/mol) required to make 50.0 mL of a 0.200 M solution.
A) 0.400 g
B) 0.0100 g
C) none of the above
D) 4.00 x 102 g
E) 10.0 g
Solved
Show answers
More tips
- L Leisure and Entertainment What can be considered an antique: defining and valuing old objects...
- F Family and Home What Kind of Wedding to have After 11 Years of Marriage?...
- C Computers and Internet How to Top Up Your Skype Account Without Losing Money?...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- F Family and Home Protect Your Home or Apartment from Pesky Ants...
- O Other What is a Disk Emulsifier and How Does it Work?...
- F Family and Home What does a newborn need?...
- F Family and Home Choosing the Right Car Seat for Your Child: Tips and Recommendations...
- F Food and Cooking How to Get Reconfirmation of Registration?...
Answers on questions: Chemistry
- B Biology PLZ, I NEED HELP NOW! If the statement is false what is the correct word for the capitalized word, if true just say true. 1) Dna is found in a cell s MEMBRANE 2) Identical twins...
- M Mathematics A square with a perimeter of 20 units is graphed on a coordinate grid. The square is dilated by a scale factor of 0.4 with the origin as the center of dilation. If (xy) represents...
- S Spanish sa palagay ninyo ano ang maaaring mangyari sa ating likas na yaman kung hindi inalis atin ang balangkas at are ang parity rights...
- C Chemistry How many molecules of CO2 are contained in 4.40g of CO2...
Ответ:
the first one is c
Ответ: