1.What volume of carbon dioxide (CO2) will be produced if 2.90 moles of iron (Fe) is produced? [Note: In the Gizmo, it is assumed that all gases are at standard temperature and pressure, or STP.] Given unit: ___2.9 Answer unit: Solution:

2. What mass of iron (Fe) can be obtained from 3.80 g iron (III) oxide (Fe2O3) reacting with excess carbon monoxide (CO)?

Given unit: 3.8 Answer unit: Solution:

3.How many moles of iron (Fe) will be produced from 6.20 moles of carbon monoxide (CO) reacting with excess iron (III) oxide (Fe2O3)?

Given unit: 6.2 Answer unit: Solution:
4.How many molecules of carbon monoxide (CO) are needed to react with excess iron (III) oxide (Fe2O3) to produce 11.6 g of iron (Fe)?

Given unit: ___11.6 Answer unit: Solution:
Fe2O3 + 3CO 2Fe + 3CO2

1:  Given unit: 2.9 mol Fe Answer unit: L Solution: 97.4 L CO2 B.

2: Given unit: 3.8g Fe203 Answer unit: g Solution: 2.66g Fe C.

3: Given unit: 6.2 mol CO Answer unit: mols Solution: 4.113 mol Fe D.

4: Given unit: 11.6 g of Fe Answer unit: molecules Solution: 1.88 x 10^23 6.

coral.

explanation:

coral. many marine organisms that produce calcium carbonate shells or skeletons are negatively impacted by increasing co2 levels and decreasing ph in seawater.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j