Nickel Material Wood Clay Iron Aluminum Copper
Brick
2.5
1.7
1.1
1.5
1.05
1.06
Length of
one side
of cube
(cm)
How would you calculate the volume of each
cube?
Volume
10
10
10
10
10
Mass
(g)
10
How would you calculate the density for each
material?
Density
(g/cm3)

Calculate the change in entropy if br2(l) is converted to br2(g). s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative

Stoichiometry- i need with 14 and 15! an explanation would be appreciated!