What is the molecular geometry of the carbonate ion? What would be the angles?
trigonal planar; 120 degrees
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15
Which molecule is most polar?
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15
What is the formula for the compound formed when aluminum ions(Al 3+) and chloride ions (Cl -) unite?
AlCl3
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banana
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rocket
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fairy
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monster
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star
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gift
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baam
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15
Which combination describes the sulfate(IV) ion, SO32â (also known as sulfite ion)?
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How many resonance structures are there for sulphite ion? How many lone pairs?
1 lone pair and 3 resonance structures.
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20
An iron block with a mass of 0.11 kg absorbs 504J of heat energy. What is the temperature rise in K? (C = 0.448 Jg-1K-1)
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15
Which statement is correct about the reaction shown? 2SO2(g) + O2(g) â 2SO3(g) ÎH = -196 kJ
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20
Consider the following equation for the combustion of hydrogen: H2(g) + 1/2 O2(g) â H2O(g) + 243 kJ In order to produce 1215 kJ of heat, how many grams of H2 must burn?
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[HL question] if you are in SL 5 marks automatically. Full marks for answer 1 guess only: Which of the following is a non-spontaneous process?
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15
Covalent compounds are formed when atoms
share valence electrons
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15
What would be the best use of graphite?
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15
A chemical formula includes the symbols of the elements in the compound and subscripts that indicate
