Chemistry
which of the 2 are pure substances?
a. element
b. compound
c. Solution
D. solvent
element and compound
If temperature decreases what happens to the rate of a chemcial reaction?
It decreases
What is distance?
the total length the object goes
Does heat energy flow into a cooler substance
or
Does cold energy move into a hot substance?
Heat energy moves into a cooler substance.
Question on graph one
Answer here
Sand is made of many small fragments of different variety.
What is this called?
Mixture
What is velocity?
the speed of an object in a specific direction
If a force is acting on a truck at 3N Up and an opposing force 3N down what is the net force?
Will it move?
Net force is 0.it will not move
Energy from the sun reaches earth by
1 Conduction
2 Convection
3 Radiation
Radiation
At what point is the graph moving the fastest?
Answer on the graph
How do you know a chemical change has occurred?
A new substance is created
Finish this sentence:
A body in motion tends to________-
Stays in motion
How many atoms of carbon are in this compound NeO2C4H12
4 carbon atoms
Dropping a piece of pasta into a bowl of hot water is an example of what?
Convection
What is a compound?
a compound consists of more than 1 kind of atom?
10 mL of Salt is added to 100 mL of rubbing alcohol. Which is the solute and which is the solvent?
Solute is the salt
Solvent is the alcohol
Which 2 of these is an element?
H2
CO2
NaCl
O2
H2 and O2
Melting an ice cube and Ripping a piece of paper is an example of what?
Physical Changes
How would raising the temperature of a water molecule affect the kinetic energy?
It would increase the kinetic energy
Answer the teachers questions about the graph
Answer the question
A student has 250 milliliters of water to a cup of sugar water. What best describes this solution?
It Is
a. More Diluted
b. Less Diluted
c. Stays the same
More diluted
How many atoms of each are in CO2
Contains 1 atom of C and 2 atoms of Oxygen
Which of these is an example of chemical changes?
Bending a piece of paper
Buter melting
Wood Burning
A banana ripening over time
Wood Burning
A banana ripening
What happens when the kinetic energy of molecules are increased?
The temperature increases
the molecules move faster
Graph question
Answer