Mixtures, Elements, Compounds
Mixtures are only _______ combined.
What is physically?
How physical properties can be observed.
What is through our five senses or measurement?
Mass multiplied by volume.
What is the equation for density?
These compounds include carbon and hydrogen.
What are organic compounds?
There are this many Oxygen atoms in CO2.
What is 2 atoms?
Pure substances that are made of 2 or more elements.
What are compounds?
Combustion, burning and bubbling are examples of this kind of property.
What is chemical?
A metal sample has a mass of 43.5 grams and a volume of 15 cubic centimeters. Calculate density.
What is 2.9 g/cm3?
Burning fire is an example of this kind of reaction.
What is an exothermic reaction?
There are this many total atoms in glucose: C6H12O2.
What is 20 atoms?
A solution where the parts of the mixture are evenly mixed and stay evenly mixed.
What is homogeneous?
Melting, Evaporating and Freezing are examples of this kind of change.
What is physical?
Sulfuric acid has a volume of 35.4 mL and a mass of 42.48 g. Calculate the density.
What is 1.2 g/mL?
Examples of this type of bond includes CaCl2, NaF, and CaO.
What is an ionic bond?
Identify which equation is balanced:
a. H2 + O2 -> 2H2O
b. H2 + Cl2 -> 2HCl
c. H2 + Cl2 -> HCl
d. H2 + O2 -> H2O
What is b. H2 + Cl2 -> 2HCl ?
An example of this unique type of element is when oxygen is always bonded to another oxygen molecule.
What is a diatomic element?
Heat or light is being given off is a clue of this kind of change.
What is chemical?
A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm and a mass of 1586.52 g. calculate the density.
What is 11.3 g/mL?
This law states that mass and energy are equal on both sides of an equation.
What is the Law of Conservation?
To balance the equation there needs to be this many molecules of H2O.
C3H8 + 5O2 -> 3CO2 + ___ H2O
What is 4 molecules?
The purest form of matter.
What is an element?
Examples of this include a can being crushed, a mirror shattering and heating a substance so it starts to melt.
What are physical changes?
Draw the density triangle.
M
D V
In order to form an ionic bond with Na+1, the Cl would have to have this charge.
What is -1?
2 HgO -> ___ Hg + O2
What is 2 molecules?