Download
1 / 63
630 likes | 719 Vues
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.
E N D
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
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
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
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
answer mass
answer Oxygen (not capitalized) watch spelling!
24. A substance that is made of atoms of more than one type bound together is called a ___.
25. A physical change differs from a chemical change in that ___ are formed
answer In a physical change no new substances are formed.
