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vova2212 [387]
3 years ago
11

Who placed all the elements in the right place according to their properties

Chemistry
1 answer:
REY [17]3 years ago
8 0
Dmitri Mendeleev Was the name of the guy you where looking for
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1. Balance this reaction: Fe2O3(s) + C(s) → Fe(s) + CO2(g)
MA_775_DIABLO [31]
<span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)
                       3 mol                      3mol
                       4 mol                      x mol
x=4*3/3= 4.0 mol

</span>2Fe2O3(s) + 3C(s) →4 Fe(s) + 3CO2(g)<span>
2 mol              3 mol
14 mol            x mol

x=14*3/2= 21.0 mol</span>
4 0
4 years ago
When iron metal reacts with oxygen, the reaction can form Fe2O3. Write a balanced chemical equation for this reaction, and find
Art [367]
 when iron and oxygen the reactin form Fe2O3 balance equation for this is  <span>4Fe + 3O2---> 2Fe2O3 
9moles of O2 are needed to produce 6mol of Fe2O3 since the ratio of oxygen to iron(II)oxide is 3:2 
                               hope its help</span>
6 0
3 years ago
The last electron in an atom of oxygen is added to a ___ orbital.
Aleks [24]

Answer:

A

Explanation:

4 0
3 years ago
The table shows the number of reactants and products present during two separate chemical reactions.
aleksandr82 [10.1K]

Answer: Option (a) is the correct answer.

Explanation:

A decomposition reaction is defined as a reaction where a compound dissociates into two or more atoms.

For example, A \rightarrow B + C + D

Whereas a chemical reaction in which two reactants combine together to result in the formation of a compound is known as a synthesis reaction.

For example, A + B \rightarrow C is a synthesis reaction.

Thus, we can conclude that the statement chemical reaction A, because the reactant is a compound identifies the decomposition reaction and describes a substance is involved.

6 0
3 years ago
If you could help me that would be awesome
elixir [45]
There are 3 significant figures. Significant numbers are the numbers that build up your total number. 1-9 always count, 0 only counts if it’s after another number. For example: 0,901 has 3 significant numbers as does 0,910. 9,10 also has 3. 0,09 has just 1.
8 0
3 years ago
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