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Aleonysh [2.5K]
3 years ago
15

Ck12 7.4 lesson review answers

Chemistry
1 answer:
Anika [276]3 years ago
3 0
What is the work ???????
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If an object is not moving, it has no
Tanzania [10]

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that answer is B

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D 6) Select True or False.
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true

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P is the dominant allele for purple. p is the recessive allele for white. A Pp flower crosses with a pp flower. What are the pos
malfutka [58]

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Pp, Pp, pp, pp, 50% chance at purple and 50% chance at white

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5 0
3 years ago
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
An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the nucleus?​
DochEvi [55]

Answer:

25

Explanation:

With Protons being the only charged particles in the nucleus, their overall charge is zero. This is because electrons and protons have opposite charges. The nuclear charge of ANY atom is given by its atomic number.

I am joyous to assist you anytime.

4 0
3 years ago
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