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This document contains a series of multiple choice questions about elements, compounds, and mixtures. It tests the understanding of: 1) The definitions of elements, compounds, and mixtures and whether they can be broken down into simpler substances. 2) Examples of compounds like carbon dioxide, sodium chloride, sugar, and salts. 3) Whether pairs like water (H and O), salt (Na and Cl), carbon dioxide (C and O), and magnesium chloride (Mg and Cl) are correctly identified as compounds or elements. 4) Whether natural gas is a mixture or substance based on its composition of carbon and hydrogen atoms. 5) Methods to separate mixtures like decantation and ways to identify a substance as a

1. Which of the following CANNOT be
broken down into simple substances
a.chemical formula
b.mixture
c.compound
d.element

2.How do you classify elements from a
compound?
AElements are single atom substances
B.Elements can be broken down into
simple substances
C.Elements are composed of two or
more molecules.
D.Elements are composed of two or
more compounds.


3.Why is it important to be familiar with
elements and compounds?
A.To classify them accordingly
B.To tell others you know them
C.To be praised by others for knowing
them
D.To enumerate elements and
compounds.

4.Carbon dioxide, sodium chloride, sugar
and salts are examples of___________.
compounds
elements
ingredients
nutritional facts

5.Which of the following is matched
correctly?
A.Water: H and O: Compound
B.Salt: Na and Cl: Element
C.Carbon Dioxide: C and O: Element
D.Magnesium Chloride: Mg and Cl:
Element


6.Natural gas is mainly composed of
carbon and hydrogen atoms that are
chemically bonded. Natural gas is
_________________?
A.substance C. solution
B.mixture d. None of the above

8.Lyziel wants to separate the marbles in a jar full
of water. Which of the following is the BEST way to
separate the mixtures?
decantation C. sublimation
dissolving D. using a magnet
Sugar is turned into a black mass and droplets of
water when heated continuously. Sugar is a/an
_________________?
element C. solution
compound D. none of the above

 9.Which of the following statements distinguishes pure substances from
mixtures?
 A.Consists of two or more kinds of matter
 b,.Have no specific solubility and densities
 C.Have specific/fixed boiling temperature and melting temperature
 D.All of the above

 10.The following are the quantitative description of
concentrations, EXCEPT:
 percent by mass
 molarity
 dilute solution
 PPM
 11.It is the ratio of the volume of solute present in a given
solution.
 A. percent by mass
 B. percent by volume
 C. percent composition

13. The mass of the solute divided by
the mass of solution multiplied by 100
is referred to _________.
A.percent by mass
B.percent by volume
C.all of the above
D.None of the above

14.A 200 mL solution contains 180 mL
of alcohol. What is the percent by
volume concentration of alcohol?
A.70% B. 80% C. 90% D.100%

15.If a 4000 grams saltwater solution
contains 40 grams of salt, what is the
percent concentration of the solution?
A.1.0% B. 2.0% C. 3.0% D.
4.0%

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sci 7 st 4.pptx

1. 1. Which of the following CANNOT be broken down into simple substances a.chemical formula b.mixture c.compound d.element

2. 2.How do you classify elements from a compound? AElements are single atom substances B.Elements can be broken down into simple substances C.Elements are composed of two or more molecules. D.Elements are composed of two or more compounds. 

3. 3.Why is it important to be familiar with elements and compounds? A.To classify them accordingly B.To tell others you know them C.To be praised by others for knowing them D.To enumerate elements and compounds.

4. 4.Carbon dioxide, sodium chloride, sugar and salts are examples of___________. compounds elements ingredients nutritional facts

5. 5.Which of the following is matched correctly? A.Water: H and O: Compound B.Salt: Na and Cl: Element C.Carbon Dioxide: C and O: Element D.Magnesium Chloride: Mg and Cl: Element 

6. 6.Natural gas is mainly composed of carbon and hydrogen atoms that are chemically bonded. Natural gas is _________________? A.substance C. solution B.mixture d. None of the above

7. 7.

8. 8.Lyziel wants to separate the marbles in a jar full of water. Which of the following is the BEST way to separate the mixtures? decantation C. sublimation dissolving D. using a magnet Sugar is turned into a black mass and droplets of water when heated continuously. Sugar is a/an _________________? element C. solution compound D. none of the above

9.  9.Which of the following statements distinguishes pure substances from mixtures?  A.Consists of two or more kinds of matter  b,.Have no specific solubility and densities  C.Have specific/fixed boiling temperature and melting temperature  D.All of the above

10.  10.The following are the quantitative description of concentrations, EXCEPT:  percent by mass  molarity  dilute solution  PPM  11.It is the ratio of the volume of solute present in a given solution.  A. percent by mass  B. percent by volume  C. percent composition

11. 13. The mass of the solute divided by the mass of solution multiplied by 100 is referred to _________. A.percent by mass B.percent by volume C.all of the above D.None of the above

12. 14.A 200 mL solution contains 180 mL of alcohol. What is the percent by volume concentration of alcohol? A.70% B. 80% C. 90% D.100%  15.If a 4000 grams saltwater solution contains 40 grams of salt, what is the percent concentration of the solution? A.1.0% B. 2.0% C. 3.0% D. 4.0%

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