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trapecia [35]
3 years ago
7

Balance the equ. representing the reaction between iron

Chemistry
1 answer:
denis-greek [22]3 years ago
7 0

Answer:

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

Explanation:

There are many ways to balance a chemical equation. In this case, I will show you the algebraic method:

The first step is assign a letter to each compound:

a Fe₂O₃ + b CO → c Fe + d CO₂

Then, you must write the balance equations for each atom, thus:

<em>Fe: 2a = c</em>

<em>C: b = d</em>

<em>O: 3a + b = 2d</em>

The last step is assign a value to a letter. I, for example, will say that <em>a is 1, </em>and then find the values for the others letters, thus:

<em>Fe: 2a = c </em>if <em>a=1; c=2</em>

<em>O: 3a + b = 2d </em>if <em>a=1 → 3+b = 2d</em>

As b = d → <em>3+d = 2d; 3 = 2d - d; </em>3=d and 3=b

Thus, the balanced equation is:

Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂

I hope it helps!

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Which of the following statements holds true for a chemical change?
ad-work [718]

Answer : The correct option is C.

Explanation :

Chemical change : It is defined as a change in which a new compounds are formed by the chemical reaction. Changes occurs in their chemical composition and properties.

The molecular structure of a substance changes in a chemical reaction is a chemical change.

  • Change in molecular structure means that there is a breaking and formation of bonds in a molecule.

The example of chemical change in terms of change in molecular structure is the reaction of hydrogen with oxygen.

The reaction of hydrogen with oxygen is,

H_2(g)+O_2(g)\rightarrow 2H_2O(l)

In this reaction, the H-H bond is break and O-H bond is form.


6 0
3 years ago
Read 2 more answers
Wharis the mass in grams of 2.000 mol of oxygen atoms?
Alika [10]

Answer:

32.00 g. Hope this helps! PLEASE GIVE ME BRAINLIEST!!!!! =)

8 0
3 years ago
H3PO4 + Ca(OH)2 → Ca(H2PO4)2 + H2O
aniked [119]

Given question is incomplete. The complete question is as follows.

Balance the following equation:

H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O

Answer: The balanced chemical equation is as follows.

2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O

Explanation:

When a chemical equation contains same number of atoms on both reactant and product side then this equation is known as balanced equation.

For example, H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + H_2O

Number of atoms on reactant side:

H = 5

P = 1

O = 6

Ca = 1

Number of atoms on product side:

H = 6

P = 2

O = 9

Ca = 1

In order to balance this equation, we will multiply H_3PO_4 by 2 on reactant side and we will multiply H_2O by 2 on product side. Hence, the balanced chemical equation is as follows.

2H_3PO_4 + Ca(OH)_2 \rightarrow Ca(H_2PO_4)_2 + 2H_2O

8 0
3 years ago
The​ half-life of a certain tranquilizer in the bloodstream is 5050 hours. how long will it take for the drug to decay to 8686​%
Novosadov [1.4K]
Using the exponential decay model; we calculate "k"
We know that "A" is half of A0
A = A0 e^(k× 5050)
A/A0 = e^(5050k)
0.5 = e^(5055k)
In (0.5) = 5055k 
-0.69315 = 5055k
 k = -0.0001371
To calculate how long it will take to decay to 86% of the original mass
0.86 = e^(-0.0001371t)
In (0.86) = -0.0001371t
-0.150823 = -0.0001371 t
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4 0
2 years ago
A molecule has three bonded atoms around the central atom. The central atom does not have any lone pairs. What is the geometry o
adelina 88 [10]

Answer:

trigonal planar

Explanation:

Tri=three, three-dimensional arrangement of the atoms that constitute a molecule.

5 0
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