Classifying Matter
Mixtures
Properties of Matter
Lab Activity
Mole and Concentrartion
100
Carbon (C) is classified as an element because...
It has one capital letter, which means it has only one type of atom.
100
It is a combination of substances that are not chemically combined.
Mixture
100
It is a characteristic that can be observed without changing the identity of the substance.
Physical property
100
How is the instrument called?
Graduated cylinder
100
How many atoms of carbon does the CO2 have?
It has one atom of carbon
200
Ethyl alcohol (C2H6O) is used as an antiseptic for wounds. Ethyl alcohol is classified as a compound because...
It has more than one capital letter, which means it has more than one type of atom.
200
Rubbing alcohol is a mixture of water and alcohol; these two liquids form a homogeneous mixture because they are miscible. Miscible means...
Miscible is a property that describes substances that can mix with others.
200
It describes how a substance changes into a new substance, either by combining with other elements or by breaking apart into new substances.
Chemical property
200
Why did the mixtures (sugar-water and milk-water) show different results in the Tyndall effect experiment?
Due to their different particle size
200
How many atoms of carbon does the Fe2(CO3)3 have?
It has 9 atoms of carbon
300
H2 is a molecule of an element because...
It has more than one atom of the same type.
300
Air is a solution of several gases. The approximate composition is 78% N2, 21% O2, and 1% of other gases. Which gas is the solvent?
N2
300
Heat conductivity is an example of a (physical or chemical property)
Physical property
300
It is the scattering of light caused by particles of sizes between 1-1000 nm suspended in a mixture.
Tyndall effect
300
Determine the mass in grams of 2.3 moles of silver.
There are 248.0964 g of silver in 2.3 moles.
400
Sound is not classified as matter because...
Sound does not have mass and does not take up space.
400
It is a type of heterogeneous mixture where particles are segregated throughout the mixture and have a size ranging from 1 to 1000 nm. Fog is an example of this type of mixture.
Colloid
400
Name one chemical property of matter.
Flammability, corrosion, or reactive to acids
400
The separating technique that we used to separate water-based colors.
Paper chromatography
400
How many moles of iron are there in 86.4 g?
There are 1.55 moles of iron.
500
Name at least four molecules of an element.
H2, N2, O2, P4, S8, F2, Cl2, Br2, I2
500
In colloidal emulsions, molecules of oil are dispersed in water or vice versa. This substance must be included to keep the molecules of oil and water mixed without separating.
Emulsifier
500
Describe how density determines if objects float or if they sink in water.
An object with a density less than the water's density will float. An object with a density greater than the water's density will sink.
500
This method is used to separate the components of mixtures that have different boiling points. We used it to separate sugar from water.
Distillation
500
How many moles of nickel are there in a 6.9 g coin if the coin contains 63% (w/w) of nickel?
There are 0.074 moles of nickel