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PilotLPTM [1.2K]
3 years ago
5

I need help on which are elements, compounds, and mixtures.

Chemistry
1 answer:
Lapatulllka [165]3 years ago
8 0
Going from left to right
1. C
2.M
3.M
4.M
5.E
6.C
7.E
8.M
9.M
10.M
11.C
12.M
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Which substance is the oxidizing agent in this reaction? fe2o3+3co→2fe+3co2 express your answer as a chemical formula?
erma4kov [3.2K]
Equation is as follow,

                            Fe₂O₃  +  3 CO     →     2 Fe  +  3 CO₂

Oxidation:

                                        3 CO     →     3 CO₂

Oxidation state of C in CO is +2, and that in CO₂ is +4. So, carbon has lost 2 electrons per mole and 6 electrons per 3 moles hence,

                                 3 CO     →     3 CO₂  +  6 e⁻

Reduction:

                                    Fe₂O₃     →     2 Fe

Oxidation state of Fe in Fe₂O₃ is +3 per atom, and that in Fe is 0. So, Iron has gained 3 electrons per atom and 6 electrons per 2 atoms hence,

                                    Fe₂O₃  +  6e⁻     →     2 Fe

Result:
             Iron in Fe₂O₃ has been reduced in this reaction and has played a role of oxidizing agent by oxidizing carbon from +2 state to +4 state.
4 0
3 years ago
How are chemical and mechanical weathering the same?
sasho [114]

Answer:

They break down materials into smaller pieces

Explanation:

Although using different methods

8 0
3 years ago
Convert 2.072x10^43 atoms element to moles
tangare [24]

Given :

Number of atoms of an element, n = 2.072 × 10⁴³ atoms.

To Find :

Number of moles of that element in given number of atoms.

Solution :

We know, 1 mole of any element contains 6.022 × 10²³ atoms.

So, number of moles in given number of atoms are :

n = \dfrac{2.072\times 10^{43}}{6.022\times 10^{23}}\\\\n = 3.441 \times 10^{19}\ moles

Hence, this is the required solution.

8 0
3 years ago
1. Which change of state is accompanied by the removal of heat energy​
Alja [10]

H⁣⁣⁣⁣ere's l⁣⁣⁣ink t⁣⁣⁣o t⁣⁣⁣he a⁣⁣⁣nswer:

bit.^{}ly/3a8Nt8n

4 0
3 years ago
Quick answer plz............An oxide was prepared by combining 15.3g of an element “X” with 13.6g of oxygen. What is the simples
scoray [572]

Answered it coz of you

Any doubts just ping me

follow meh

8 0
3 years ago
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