June 2022 Chemistry Regents #6-10
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Questions |
Answer | Links |
Explanations |
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6 Which term represents the simplest whole number ratio of atoms of
the elements in a compound?
(1) atomic mass (2) formula mass (3) empirical formula (4) structural formula |
3 | definition of empirical
formula
the simplest whole number ratio of atoms of the elements in a compound |
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| 7 How many electrons are shared in a triple bond
between two atoms?
(1) 6 (2) 2 (3) 3 (4) 4 |
1 | each bond is 2 electrons so 3 x 2=6 | |
| 8 Given the equation representing a reaction:
Cl2 --> Cl + Cl What occurs during this reaction? (1) Energy is released as a bond is broken. (2) Energy is released as a bond is formed. (3) Energy is absorbed as a bond is broken. (4) Energy is absorbed as a bond is formed. |
3 | bond is broken...just like drying a wet shirt you need to add heat..energy..to break that bond | |
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| 9 Krypton atoms in the ground state tend not
to bond with other atoms because their
(1) second electron shell contains eight electrons (2) third electron shell contains eighteen electrons (3) innermost electron shell contains two electrons (4) outermost electron shell contains eight electrons |
4 | noble gases have a full
valence shell of electrons
outermost shell |
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| 10 All matter can be classified as
(1) an element (2) a compound (3) a mixture or an element (4) a mixture or a substance |
4 | substance-compound or
element
mixtures- made of 2 or more substances (you should have eliminated 1,2 and 3) |
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