Types of Matter
A substance that contains only one type of matter and has consistent properties and composition.
What is a Pure Substance?
A physical combination of two or more substances that are not chemically joined and is uniform throughout.
What is a Homogeneous Mixture?
The flammability of a substance.
What is a Chemical Property?
Energy needed to start a reaction
What is activation energy?
Convert 2.3 x 10-3 ML to cL. Show dimensional analysis
(2.3*10^-3 ML)/(1)*(1L)/(10^-6 ML)*(10^2 cL)/(1L)=2.3*10^5 cL
A pure substance made of only one kind of atom.
What is an Element?
A physical combination of two or more substances that are not chemically joined and is not uniform throughout.
What is a Heterogeneous Mixture?
NaCl was dissolved in H2O.
What is a Physical Change?
This can speed up a chemical reaction but is not considered one of the reactants because it does not get used up in the reaction
What is a catalyst?
What is the volume of 3.4 g of a substance with a density of 1.9 g/mL. Show dimensional analysis with density used as a conversion factor.
(3.4g)/(1)*(1mL)/(1.9g)=1.8mL
A pure substance made of chemically joined atoms of two or more different elements.
What is a Compound?
A method for separating components of a heterogeneous mixture.
What is Filtration?
The temperature at which a substance freezes
What is a Physical Property?
When bonds break, energy is...
What is absorbed?
Convert 3.4 g/hm3 to g/mL. Show dimensional analysis.
(3.4 g)/(1 hm^3)*(10^-6 hm^3)/(1m^3)*(1m^3)/(10^6cm^3)*(1cm^3)/(1mL)=3.4*10^-12 g/(mL)
The type of matter that forms when a pure substance is dissolved into another pure substance
What is a homogeneous mixture or solution?
A method for separating components of a solution.
What is Distillation?
Two substances were combined that caused the combination to burn, change color, and release a gas.
What is a Chemical Change?
When products have more energy than reactants, the reaction is considered...
What is endothermic?
A process that can separate elements from a compound
What is a chemical reaction?
One similarity and three differences between mixtures and compounds
Similarities = Both composed of multiple components
Difference = Chemically joined components (C) vs Physically joined components (M), Definite composition (C) vs Not definite composition (M), Fixed mass ratio (C) vs not fixed mass ratio, Different properties than individual components (C) vs components retain their own individual properties (M)
A liquid substance was heated causing the formation of a gas, and when the gas was cooled, it formed the same type of liquid again.
What is a Physical Change?
When water freezes into ice, this process is considered...
What is exothermic?