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__________________________________________________________________________________________________________________________ Worksheet Answer Keys
Heating Curves and Calculations HW Answer Key  Assigned as HW on 10/19/16

Matter Textbook Questions Answer Key Assigned as HW on 9/22/16 and 9/27/16

 

Particle Diagram Worksheet Key  Assigned as HW on 9/23/16

 

States of Matter Worksheet Answer Key Assigned as classwork on 9/28/16

 

 

 Castle Learning Matter Review Answer Key- Given out in class 9/29/16
1) 2   Elements can NEVER be decomposed chemically.
2) 4   Solids have a regular geometric pattern.
3) 2   Density is an intensive property that is the same for any sample size of a substance.
4) 3   Gases have indefinite shape and indefinite volume
5) 4
6) 4   Any reaction indicates a chemical change has occurred.
7) 2   Solids are fixed particles in regular geometric pattern.
8) 3   Compounds can be decomposed chemically. All other choices are elements.
9) 4
10) 4 Elements can NEVER be decomposed chemically. All other choices are compounds.
11) 1 Calcium= Ca, element. Diamond is made of Carbon= C, element. Uranium= U, element.
12) 1
13) 1
14) 2
15) 4
16) Sample C contains a diatomic element (Fluorine= F2) and a binary compound (Hydrogen chloride= 2 different elements)
17) Sample A is a binary compound and substance while sample B is a mixture of two different binary compounds. (2 substances are present in sample B, while only 1 substance is present in sample A)
18) Heterogeneous
19) NaCl(aq), the particles of salt and water and evenly distributed to give a uniform appearance.
20)  NH4NO3 (s) dissolves in water making it aqueous, NH4NO3 (aq). All aqueous solutions are homogeneous mixtures.
21) Mixture 1= homogenous because it is colorless with no visible solid on the bottom of the beaker. You cannot see the different components.
Mixture 2= heteregeneous because you can see the black solid on the bottom of the beaker. All components are visible.
22)  1
23) 4
24) 2 (aq)= aqueous= dissolved in water. All substances dissolved in water are a homogenous mixture.
25) 4

Calorimetry Practice Questions and Answer Key Assigned to period 9 as Classwork on 10/17/16 

There is a mistake in the answer key. The answer to #2 is 54 grams not 120 grams.

Matter and Energy Review Packet Key

 

Multiple Choice Review Questions Key

 

Sample Heating/Cooling Curve Regents Questions Key

Sample Heating/Cooling Curves Regents Questions Answer Key