P Block - Group 16 Questions and Answers

Cognitive development: Around 7 years old to 11 years of age, the child understands that some things that have been changed can be returned to their original state. For example, water can be frozen and then thawed to become liquid again. This shift in cognitive development is referred to as:
Seriation.
Conservation
Reversibility
Classification
Inorganic Chemistry
P Block - Group 16
Cognitive development: Around 7 years old to 11 years of age, the child understands that some things that have been changed can be returned to their original state. For example, water can be frozen and then thawed to become liquid again. This shift in cognitive development is referred to as: Seriation. Conservation Reversibility Classification
Rank the following ions in order of decreasing radius: 02-S2,Se².Te², and Po2. Use the periodic table as necessary.
Inorganic Chemistry
P Block - Group 16
Rank the following ions in order of decreasing radius: 02-S2,Se².Te², and Po2. Use the periodic table as necessary.
Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.73 g of magnesium ribbon burns with 8.83 g of oxygen, a bright, white light and a white, powdery product are formed. 
Enter the balanced chemical equation for this reaction. Be sure to include all physical states.
Inorganic Chemistry
P Block - Group 16
Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.73 g of magnesium ribbon burns with 8.83 g of oxygen, a bright, white light and a white, powdery product are formed. Enter the balanced chemical equation for this reaction. Be sure to include all physical states.
3PbO₂ + Br- + 6H+ ---> BrO3- + 3Pb2+ + 3H₂O
In the above reaction, the oxidation state of lead changes from _ to _.
How many electrons are transferred in the reaction?
Inorganic Chemistry
P Block - Group 16
3PbO₂ + Br- + 6H+ ---> BrO3- + 3Pb2+ + 3H₂O In the above reaction, the oxidation state of lead changes from _ to _. How many electrons are transferred in the reaction?
What is the total number of valence electrons in the Lewis structure of SF2 ?
electrons
Draw a Lewis structure for SF2.
If the species contains oxygen, do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.
Inorganic Chemistry
P Block - Group 16
What is the total number of valence electrons in the Lewis structure of SF2 ? electrons Draw a Lewis structure for SF2. If the species contains oxygen, do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.
How many non-bonding electrons are on the central atom in the optimized Lewis structure of OBr2, in which the formal charges are minimized?
Inorganic Chemistry
P Block - Group 16
How many non-bonding electrons are on the central atom in the optimized Lewis structure of OBr2, in which the formal charges are minimized?
According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 26.6 grams of oxygen gas with excess sulfur dioxide?
sulfur dioxide (g) + oxygen (g) --> sulfur trioxide
Inorganic Chemistry
P Block - Group 16
According to the following reaction, how many grams of sulfur trioxide will be formed upon the complete reaction of 26.6 grams of oxygen gas with excess sulfur dioxide? sulfur dioxide (g) + oxygen (g) --> sulfur trioxide
YOU MUST SUBMIT WORK FOR THIS PROBLEM.
Draw the Lewis structure for H₂CS. You must show adding up the valence electrons.
Determine the following for the structure:

•Molecular Shape
• Bond Angle
• Polarity
Inorganic Chemistry
P Block - Group 16
YOU MUST SUBMIT WORK FOR THIS PROBLEM. Draw the Lewis structure for H₂CS. You must show adding up the valence electrons. Determine the following for the structure: •Molecular Shape • Bond Angle • Polarity
SO3 has several resonance structures. Consider one of these structures in which all the atoms follow the octet rule. For this particular resonance structure, which of the following statements is (are) true? Select all that apply to get full credit.
The molecular geometry or shape of SO3 is trigonal planar.
There is one set of lone pair on the central sulfur atom.
The central sulfur atom forms 2 double bonds with the oxygen atoms.
The central sulfur atom forms 3 single bonds with oxygen atoms.
Inorganic Chemistry
P Block - Group 16
SO3 has several resonance structures. Consider one of these structures in which all the atoms follow the octet rule. For this particular resonance structure, which of the following statements is (are) true? Select all that apply to get full credit. The molecular geometry or shape of SO3 is trigonal planar. There is one set of lone pair on the central sulfur atom. The central sulfur atom forms 2 double bonds with the oxygen atoms. The central sulfur atom forms 3 single bonds with oxygen atoms.
89.3 grams of bismuth (III) sulfate reacts with 33.5 grams of calcium chromate. Predict the products, write the complete reaction equation, balance, and calculate the mass of the aqueous product.
Inorganic Chemistry
P Block - Group 16
89.3 grams of bismuth (III) sulfate reacts with 33.5 grams of calcium chromate. Predict the products, write the complete reaction equation, balance, and calculate the mass of the aqueous product.
Elemental sulfur is yellow in color and has an unpleasant odor similar to rotten eggs. Answer the following questions about sulfur.
How many valence electrons?
What is the valence shell?
Name another element that has a similar dot diagram.
Inorganic Chemistry
P Block - Group 16
Elemental sulfur is yellow in color and has an unpleasant odor similar to rotten eggs. Answer the following questions about sulfur. How many valence electrons? What is the valence shell? Name another element that has a similar dot diagram.
Rank the following series of molecules or ions in order of decreasing bond energy using their bond order to predict relative magnitude:
oxygen difluoride: F- OF, oxygen: O2, carbon monoxide: CO
Rank from highest to lowest bond energy.
Inorganic Chemistry
P Block - Group 16
Rank the following series of molecules or ions in order of decreasing bond energy using their bond order to predict relative magnitude: oxygen difluoride: F- OF, oxygen: O2, carbon monoxide: CO Rank from highest to lowest bond energy.
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