2: A compound may be separated into its elements by
decomposition
evaporation
filtration
synthesis
3: An example of a chemical change is the
condensation of steam
corrosion of metals
dissolving of a substance in water
melting of ice
4: A substance composed of two or more elements chemically united is called
an allotrope
a compound
an isotope
a mixture
5: Air is a mixture because it
is colorless
is odorless
does not have a uniform composition
may be liquefied
6: A logical guess which is sometimes used to solve a scientific problem is called
the scientific method
a hypothesis
a theory
a law
7: An example of physical change is
burning
decaying
melting
rusting
8: The state of matter, commonly found on earth, in which the characteristic molecules move at the highest speed is
solid
liquid
gas
plasma
9: A substance which can be further simplified may be either
an element or compound
an element or a mixture
a mixture or a compound
none of the above
10: In the ________ state a substance has a definite shape and a definite volume.
liquid
gas
solid
none of the above
11: The amount of mass per unit volume refers to the
density
specific gravity
odor
state of a substance
12: A substance which cannot be further simplified or decomposed by ordinary chemical means is
a mixture
a compound
an element
a molecule
13: The smallest possible unit of a chemical compound that retains the properties of the entire compound is
a proton
an electron
an atom
a molecule
14: In the ________ state, a substance has neither a definite shape nor a definite volume
solid
liquid
gas
none of the above
15: A substance which results from the union of two or more substances in no definite proportion by weight is a(n)
element
compound
mixture
conglomerate
16: Milk is an example of a(n)
element
compound
mixture
conglomerate
17: A sample of calcium carbonate obtained in Kentucky contains 48% oxygen, 40% calcium and 12% carbon. A sample of calcium carbonate from Illinois would have the same proportion of elements. This is an example of the law of
Conservation of Matter
Definite Proportions
Multiple Proportions
Conservation of Energy
18: In the compounds carbon dioxide(CO2) and carbon monoxide (CO), the amounts of oxygen combined with the same amount of carbon are in the ration of 1:2. This illustrates the law of
Conservation of Matter
Definite Proportions
Multiple Proportions
Conservation of Energy
19: The amount of space a substance occupies is called its
density
volume
state
physical property
20: The property which compares the density of a substance with that of water is known as its
volume
specific gravity
shape
weight
2006-09-12 04:22:14 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
2. decomposition
3.corrosion of metals
4. compound
5. does not have a uniform composition
6. hypothesis
7. melting
8. gas
9. mixture and compound
10. solid
11. density
12. element
13. a molecule
14. gas
15. mixture
16 mixture
17. Conservation of Matter
18.Definite Proportions
19. volume
20. specific gravity
2006-09-12 04:45:38 · answer #1 · answered by _kittie_ 2 · 1⤊ 0⤋
2: A compound may be separated into its elements by
decomposition
3: An example of a chemical change is the
corrosion of metals
4: A substance composed of two or more elements chemically united is called
a compound
5: Air is a mixture because it
does not have a uniform composition
6: A logical guess which is sometimes used to solve a scientific problem is called
a theory
7: An example of physical change is
melting
8: The state of matter, commonly found on earth, in which the characteristic molecules move at the highest speed is
gas
9: A substance which can be further simplified may be either
a mixture or a compound
10: In the ________ state a substance has a definite shape and a definite volume.
solid
11: The amount of mass per unit volume refers to the
density
12: A substance which cannot be further simplified or decomposed by ordinary chemical means is
a compound
13: The smallest possible unit of a chemical compound that retains the properties of the entire compound is
a molecule
14: In the ________ state, a substance has neither a definite shape nor a definite volume
gas
15: A substance which results from the union of two or more substances in no definite proportion by weight is a(n)
compound
16: Milk is an example of a(n)
compound
17: A sample of calcium carbonate obtained in Kentucky contains 48% oxygen, 40% calcium and 12% carbon. A sample of calcium carbonate from Illinois would have the same proportion of elements. This is an example of the law of
Definite Proportions
18: In the compounds carbon dioxide(CO2) and carbon monoxide (CO), the amounts of oxygen combined with the same amount of carbon are in the ration of 1:2. This illustrates the law of
Multiple Proportions
19: The amount of space a substance occupies is called its
volume
20: The property which compares the density of a substance with that of water is known as its
specific gravity
2006-09-12 04:46:34 · answer #2 · answered by raj 7 · 1⤊ 0⤋
2) evaporation
3) corrosion of metals
4) a compound
5) is odorless
6) a theory
7) melting
8) gas
9) a mixture or a compound
10) solid
11) state of a substance
12) an element
13) an electron
14) gas
15) conglomerate
16) conglomerate
17) Definite Proportions
18) Definite Proportions
19) physical property
20) volume
2006-09-12 04:41:29 · answer #3 · answered by PunkGreen1829 4 · 1⤊ 1⤋
You know that your cheating right? If I were you, I would delete this question NOW! If your teacher, or even worse, your principle catches you, Im not sure what they would do at your school, but at mine, they would sespend me off campus for 5 days, and that only the FIRST OFFENCE. Second is a suspention of10 days off campus, and third is a long term suspention, which is 10+ days AND a possible expultion! Thats not good man. So do the right thing and delete this question now as soon as you read this.
And anyone supporting him, your doing the wrong thing, ive reported this question.
2006-09-12 05:40:41 · answer #4 · answered by rswilliamdude 2 · 0⤊ 4⤋
an unknow diprotic acid requires 44.39ml of 0.111mnaoh to completely neutralize a 0.580-g sample calculate the approximate molar mass of acid
2016-03-26 21:54:11 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Sorry, I'm not doing anyone else's school work for them this week. You should have caught me yesterday.
2006-09-12 04:24:15 · answer #6 · answered by Anonymous · 0⤊ 2⤋