Titration is the slow edition of one solution of unknown concentration to a noun volume up another solution of unknown concentration until the reaction reaches neutralization which is often indicated by a color change
Hello there!
I am not really sure which part you are talking about but let me answer some of them.
First, you need to read the information they gave you about glucose etc..
13- What is produced in photosynthesis?
"Photosynthesis is essential for all life on earth, because it provides food and oxygen."
Thus, the answer is: Photosynthesis produced food and oxygen.
14- What is the glucose used for?
"The glucose produced is used by the plant for energy and growth."
Thus, the answer is: The glucose used for energy and growth of the plants.
15- What is the oxygen used for?
"The oxygen produced is released into the air for us to breath."
Thus, the answer is: The oxygen used for us to breath.
I hope this helps!
Let me know if you have questions about the answer.
Answer:
R.F.M of Iron (II) oxide :

Moles :

Molecules :

Mass of Magnesium bromide : 5.76 g
<h3>Further explanation</h3>
Complete question
<em>What mass of Magnesium bromide is formed when 1.00 g of magnesium reacts with 5.00 g of bromine?</em>
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Reaction
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mol Mg

mol Br₂

Limiting reactants : Br₂(smaller)
mol MgBr₂ = mol Br₂=0.0313
mass MgBr₂ :

2.49 x 10^46 is the answer