Question 22 2 pts
Consider the below unbalanced chemical equation. What mass of iron can be produced from 50.0 g
of iron oxide and 50.0 g of carbon monoxide?
Fe2O3 + CO → Fe + CO2
Question 23
2 pts
The combustion of butane releases 2877 kJ/mol of heat energy. What mass of butane is needed to
generate 20 kJ of energy? Please report your answer in milligrams.
Question 24
2 pts
Consider a particular reaction that has an activation energy of 500 kJ and an enthalpy of reaction of
+150 kJ. When a catalyst is added to the reaction, the new activation energy is measured to be 400
kJ.
What is the enthalpy of reaction for the catalyzed reaction? Please answer in kJ.
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THANKS  

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Explanation:

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.