How many individual atoms make up one unit of nitrogen triiodide, NI3?
4
100
Salad
Heterogeneous
100
Two or more elements joined in fixed proportions
Compound
200
Toxicity
Chemical Property
200
Elements or Compounds:
Earth, wind, fire, water
Compounds
200
Phlogiston theory contradicts the conservation of mass because ___
phlogiston can have a negative mass
200
Which is homogeneous?
Bag of rocks;
Brass;
Pizza;
Oil and water
Brass
200
According to the law of conservation of mass, the mass of the reactants is _____ (greater than, equal to, less than) the mass of the products
equal to
300
Has an indefinite volume and an indefinite shape
Gas
300
Which is a compound?
Brass;
Iron;
Sodium chloride;
Sea Water
Sodium chloride
300
Replaced by the law of conservation of mass
Phlogiston Theory
300
Separating pigments of a leaf
Chromatography
300
Which is a chemical property of chlorine?
A. Boiling point of -34 *C
_____ B. Has the symbol Cl
_____ C. Reacts with other elements
_____ D. Gas at room temperature
C. Reacts with other elements
400
Loose particles that are compressible
Gas
400
Developed the periodic table by organizing elements
Dimitri Mendeleev
400
Completed detailed experiments to determine the law of conservation of mass
Lavoisier
400
Method of separation that relies on different boiling points
Distillation
400
DOUBLE JEOPARDY!!!
Worth 800 points
Three signs of a chemical change
Production of heat, production of gas, production of light, color change, precipitate formed
500
Which is NOT a chemical change?
______A. Change in color
__________B. Photosynthesis
_____C. Types of chemical bonds that can be formed
_____D. Precipitate formed
C. Types of chemical bonds that can be formed
500
Which is an element?
OMg
YAs
No
NErDy
No
500
A 7.00 g sample of iron reacts with oxygen to form 16.3 g of iron oxide, or rust. How many grams of oxygen are used in the reaction?
9.3 g of oxygen
500
You are stranded in the wilderness. The only source of water is a stream. What methods of separation should you use to ensure the water is safe to drink?