2Reactants are the materials used in a chemical reaction.
3In a chemical equation, the material to the left of the arrow equals the material on the right.
4Diatomic molecules contain two atoms.
5Coefficients are the numbers written before a symbol or formula.
6(aq) stands for a solution involving any liquids.
7A synthesis reaction involves the combination of two or more substances to form a compound.
8In a single replacement reaction, sodium (Na) does not replace hydrogen.
9Metals can replace nonmetals.
10Combustion occurs when a substance combines with oxygen to produce light and heat.
11The kinetic-molecular theory states that all particles of matter are always in motion.
12Gases have molecules in rapid random motion.
13Gases can be considered fluids.
14Gases are not easily compressed.
15Gases spread to fill out space.
16Increased pressure on a gas at constant temperature will cause the volume to decrease.
17When a gas is under constant pressure and its temperature increases, its volume will increase.
18Pressure is force per unit of area.
19A newton is a unit of force.
20The barometer measures air pressure.
21Normal air pressure at sea level is read as 760 mm of mercury.
22STP is 100掳C and one atmosphere of pressure.
23The combined gas law involves all variables discussed in Boyle's, Charles's and Gay-Lussac's Law.
24Liquids are fluids.
25Liquids are easily compressed.
26Solids have definite shape and volume.
27Amorphous solids have crystal structures.
28Glass is amorphous.
29Change of state is a physical change.
30Boiling is rapid evaporation.
31Increasing the pressure of a liquid lowers its boiling point.
32Pure, crystalline solids freeze and melt at the same temperature.
33Sublimation is the change of a solid to a gas.
34Water expands as it freezes.
35Heat of vaporization turns a liquid to a gas.Chemistry true and false questions?
The above answer has quite a few wrong.
3. false. The mass will be the same, but the products and reactants (the material) will be different.
6. (aq) implies aqueous. Water only, not all liquids.
13. gases are fluids. (fluid is not the same as liquid)
17. Volume will increase at constant pressure
22. STP is not 100C.
27. Amorphous means no crystalline structure.
31. Increased pressure raises the BP.
32. TrueChemistry true and false questions?
Do you believe in magic? In a young girls heart?
woooooooow that is a lot of questions in one post why don't u narrow it a bit into few questions, anyways i will answer as much as i can but not sure of all of them ok.
3. True
4. True
5. True
6. True
9. False (they cannot)
13. False (never, gases are different from fluids)
14. False (They are easily compressed)
15. True
16. True
17. False (the opposite is right)
18. True
19. True
21. True
22. True
24. True
23. True
25. False (Opposite is right)
26. True
27. True
29. True
31. True
32. False (it depends)
34. True
35. True
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