Answer:Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as haematite contain iron(III) oxide, Fe 2O 3. The oxygen must be removed from the iron(III) oxide in order to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
Answer:
C + O2 ⇒ CO2
mole of O2: 18.6/32=0.58125= mole of CO2
⇒ gram of CO2: 0.58125*(12+32)=25.575
Explanation:
An ore is a type of rock that contains many minerals. But a mineral is just a part of the ore. So all ores are minerals but all minerals are not ores.
Answer:
Option D is good to go!
Explanation: as per the reactivity series more reactive substances will react with the counterpart substance.The most reactive substance here is calcium while the least reactive is aluminium, the magnesium comes in between.As per their reactivity, these substances will react with oxygen.
Explanation:
<span>You did not specific if the evolution of O2 gas comes from the decomposition of hydrogen peroxide. But I assume it is , since MnO2 is commonly used to increase the rate of hydrogen peroxide decomposition to water and oxygen.
Thus MnO2 increases the rate of O2 gas evolution, but the amount of O2 gas evoluted is the same. It does so by providing an alternative reaction pathway via a transition state with lower activiation energy.</span>