A property that is constant and does not depend on the size shape or amount of the substance
100
How do you find a phase change of a suibst?
Graph the tem over time and look for the plateau
100
Is milk a pure substance or mixture?
If pure substance is it an element or compound?
If a mixture is it homogeneous or heterogeneous?
A mixture which is homogeneous
200
Zinc metal reacts with HCl to produce Hydrogen gas. Is this a physical or chemical property?
Chemical property
200
Describe the arrangement AND movement of particles in solids
particles close together, little movement
200
What is the formula for calculating density?
Mass / volume
200
At what point on this temperature vs time graph would only gas/vapor be present?
Point 7
200
How many grams of KNO3 will dissolve in 100 ml of water at 50 degrees?
Approximately 85 g
300
Classify Glucose (C6H12O6) as:
Pure substance or mixture?
If pure substance is it an element or compound?
If a mixture is it homogeneous or heterogeneous?
Pure substance
Compound-contains carbon, hydrogen and oxygen
300
What phase of matter has a definite volume but no definite shape?
Liquids
300
At what temperature would this substance freeze if it were in the liquid phase and cooled?
Approximately 0 degrees celsius
300
What is a solid which crystallizes out of a solution usually due to a reduction in temperature or volume?
Precipitate
400
Classify granola as:
Pure substance or mixture?
If pure substance is it an element or compound?
If a mixture is it homogeneous or heterogeneous?
Mixture - Heterogeneous
400
Which phase of matter is the most common in the universe?
Plasma
400
If you have 18.5 g of a substance that has a volume of 22 ml what is the density? What PHASE is this substance MOST likely to be in?
.84 g/ml
Liquid
400
Could this be water? Defend your answer
No - although its melting point is the same as water its boiling point is about 30 degrees; water boils at 100 degrees
400
What term describes the maximum amount of solute which can be dissolved in 100 ml of solvent?
Solubility
500
Give 3 indications that a chemical reaction has occurred.
color change
bubbles produced
heat given off or absorbed
Precipitate forms
odors produced
500
Describe one way in which plasmas differ from gases
electrons are stripped from atoms
conduct electricity
500
A container has a mass of 12.500g. It is filled with 750 cm3 of an unknown substance. The final mass is 12.568g
a) What is the density of the unknown?
b) Refer to table to identify substance