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WorksheetsFinal Part 2 2022- mixtures, Reactions, Properties
Total questions: 30
Worksheet time: 1hrs 7mins
Jordan has a mixture of two solids that he has to separate. The solids are small granules that are the same size but different colors. She knows that the silver granules are aluminum and the white granules are salt. Which procedures are the Least reliable way to separate the mixture?
Dissolve mixture in a universal solvent and filter. Then evaporate solvent to retrieve the salt.
Dissolve mixture in a universal solvent and filter.
Pass a magnet over the mixture.
Sift the mixture through fine wire mesh.
A mixture of coffee grounds and coffee are being poured through filter paper. Which property of the coffee grounds & filter paper is being used to separate them out from the molecules?
Size of the coffee particles
the polarity of the molecules
Size of pores in the filter
Temperature of the water
A student wanted to test some objects to see if they would sink or float. What conclusion can be made from her investigation?
The marble is less dense than the water and the mineral oil
The mineral oil is less dense than the colored water.
The block is less dense than the water and denser than the mineral oil
The block is more dense than the water and less dense than the mineral oil
Which of the following would be the best method to separate small pieces of wood and small pieces of metal placed in a beaker?
Heat the beaker on a hot plate
Pour the contents into a strainer/filter
Let the contents set for a day to settle out
Add water to the beaker to see which one sinks and which one floats
Students put 2 ice cubes on separate plates. One ice cube had a mass of 20 grams. The other had a mass of 30 grams. Which results would be the same for both ice cubes in this investigation?
The time it took each ice cube to melt completely
The temperature at which each ice cube melted
The amount of liquid produced on each plate
The total volume of each ice cube
What does this illustration contain?
Elements
Compunds
Mixture of just elements
Mixture of just compounds
Use the graph below to answer this question. What state of matter would the substance be at point A?
(a)
Mrs. Tamel measured 60 milliliters of hydrogen peroxide into a beaker and measured its temperature. She added yeas to the hydrogen peroxide and stirred the beaker. She measured the temperature at three different times in degrees Celsius. She wrote down her observations in the table.
Which sentence describes her results?
Stirring caused the temperature to increase and fewer bubbles to form.
A physical change cause the temperature to decrease and bubbles to form.
A chemical change caused the temperature to increase and more bubbles to form.
Mixing two substances caused the temperature to decrease and fewer bubbles to form.
When a Bunsen burner is lit; why is the presence of a flame considered to be an indication of a chemical reaction?
A flame indicates a change of energy.
A flame indicates a phase change.
A flame indicates new physical energy is forming.
A flame indicates a change in chemical energy.
Phillip watches a burning log in the fireplace. He makes these observations:
I. There is a strong smell of smoke.
II. The fire gives off heat.
III. Light is emitted where there are flames
IV.Heat waves appear in the air above the log
V. Ashes form from the logs.
Which of Phillip’s observations are conclusive evidence that the burning log undergoes chemical changes and not just a physical change?
observations I and V only
observations II , III, and V only
observations I, III, and V only
observations I, IV, and V only
Predict the bond that will form between Pb and N.
(a)
Predict the bond that will form between S and C.
(a)
If this compound had a coefficient of 2 how many Iron atoms would be in this compound?
(a)
What coefficient would this compound need to have in order for it to contain 5 sulfur atoms?
(a)
If carbon gained 3 electrons what would its charge be?
Type the charge and then the number
(a)
An Ionic Bond is which of the following
Loses or gains electrons
Shares electrons
Between metal & Non-metals
Forms multiple bonds
Forms between opposite charges
A covalent Bond is which of the following
Between non-metal & non-metal
Shares electrons
Forms multiple bonds
Forms between opposite charges
How many valence electrons does Sulfur have?
(a)
If an atom has 12 protons and 12 electrons what charge will it have?
(a)
Which substance contains bonds that involve a transfer of electrons from one atom to another?
CO2
NH3
GaP
Cl2
Which element can combine with Be to form a neutral ionic compound? (Type the symbol of one of the possible correct answers)
(a)
Type any one of the standard possible endings of a for polyatomic ions
(a)
What ending is used for polyatomic ions, but only as an exception?
(a)
What would be the subscript of chromium
Cr3+ O2-
(a)
What is the charge of Nitrogen in : Zn3N2 (Type the charge and then the number)
(a)
Na & S
NaS
Na2S
Na-2S2
S2Na
