how many oxygen atoms are there in the molecule c 12 h 22 o 11 ?
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How many oxygen atoms are there in the molecule C 12 H 22 O 11 ?. Answer. 11 (eleven). 2. A substance that cannot be broken down into simpler substances is _________. Answer. An element. 3. Knowing the chemical properties of a substance will tell you how the substance ______. Answer. - PowerPoint PPT PresentationTRANSCRIPT
How many oxygen atoms are there in the molecule C12H22O11?
Answer
11 (eleven)
2.A substance that cannot be broken
down into simpler substances is _________.
Answer
An element
3. Knowing the chemical properties of a substance will tell you how the substance ______.
Answer
React with other substances
4. The chemical formula for water means that each water
molecule contains_____
Answer
Two hydrogen atoms and one oxygen atom
5. Which state of matter will hold its shape without a container?
Answer
solid
6. A liquid changes rapidly into a gas at the liquid’s ______.
Answer
Boiling point
7. Which of the following is NOT an example of a physical
property?
Choices: freezing point, boiling point, reactivity, or density
answer
reactivity
8. Matter is defined as __.
Answer:
Anything that takes up space (volume) or has mass.
9. Which of the following is an example of a gas-liquid mixture?
Choices: Air we breathe, a carbonated drink, a helium balloon,
or ice cubes
Answer
A carbonated beverage
10. Digesting food is an example of ____ change.
Answer:
chemical
11. Which of the following is an example of a physical change
Choices: dissolving salt in water, burning wood into charcoal, cooking
an egg, or rusting iron
Answer
Dissolving salt in water
12. A molecule of water is made from ____ combining 2 hydrogen
atoms and one oxygen atom. Choices: physically, ionically,
thermally, or chemically
answer
chemically
13. A physical property of gold is its _____
Choices: density, reactivity with powerful acids, or non-flammability
answer
density
14. You put one gram of salt into one liter of water and stir. The
resulting liquid is an example of ___,
answer
Solution (most precise answer)
15. Grinding quartz crystals down to produce sand is an
example of a _____.
answer
Physical change
16. A mixture of flour and water is called a ___ mixture because the substances do not dissolve.
answer
Suspension (most precise answer)
17. The ___ of a substance is defined as its mass divided by its
volume.
answer
density
18. Aluminum, oxygen, and carbon are examples of ___.
Answer
Elements
19. Each molecule of iron oxide, Fe2O3 contains ___ atoms of iron.
answer
two
20. A change in color during a reaction is often a sign that a ___
has occurred
answer
Chemical reaction (chemical change)
21. We inhale oxygen and exhale carbon dioxide as a result of a ___ change in our bodies.
answer
chemical
22. Sound is NOT made of matter because it has no ___.
answer
mass
23. The chemical symbol O stands for the element ___.
answer
Oxygen (not capitalized) watch spelling!
24. A substance that is made of atoms of more than one type
bound together is called a ___.
Compound
25. A physical change differs from a chemical change in that
___ are formed
answer
In a physical change no new substances are formed.
26. Explain why changes of state are physical changes?
Use one complete sentence. Do not use pronouns!
Answer: Changes of state do not change the substance’s identity.
27. Name the two types of pure substances.
Use a complete sentence. Do NOT use pronouns.
Answer: Elements and compounds are the two types of
pure substances.
28. List four clues that suggest a chemical change is taking place.
Possible clues: smoke, fire, heat, energy, light, color or odor change, fizzing or bubbling Examples: burning, cooking, frying,
reacting,
29. Why is light not a form of matter?
Use a complete sentence. Do NOT use pronouns.
Answer: Light is not made up of matter. Light is energy.
30. Calculate the density of a sample of gas with a volume of 130 mL and a mass of 585 g.
DO ALL OF THESE STEPS!
• Write out the formula
• Write in the known values
• Calculate
• Round to sig figs!
• Label your answer
Answer: Density = mass/volumeD = 585 g/130 mL
585/130 = 4.5two sig figs
4.5 g/mL
EssayExplain what it means to say that a
chemical change is a change in composition. Give an example of a
chemical change and state what changes occur.
EssayHow do you know that the air you breathe is matter even though you
cannot see it?
Essay #2 answer
• Air expands to fill our lungs so it must take up space which is one of the criterion for matter.
• Also could use that it fills up other objects such as balloons.