Iron is the most commonly used metal iron is extracted in a blast fumace from iron oxide using carbon monoxide.
Fe:03
Fe 300
A sample of the ore haematite contains 70% iron oxide.
Calculate the amount of iron oxide in 2000 tonnes of haematite.
tonnes
Amount of iron oxide =

70/100 X 2000 = 1400 tonnes of iron.

Explanation:

take the percentage of iron oxide and divide with overall amount of iron oxide using 2000 tonnes of hematite ore. 1400 tonnes of iron will be produced. this is not the percentage. if you want the percentage of iron produced just divide.

70/100 x 200 = 1400 tonnes of iron

percentage of iron produced = 70/1400 x 100 = 5 % of iron produced from 70% of iron oxide in 2000 tones of hematite ore

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

1.solid

2.carbon dioxide

3.helium