What is the number of nitrogen molecules that reacted with excess hydrogen to make 2x10^10 molecules of ammonia

Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck’s constant is 6.626 x 10-34 jou

laila [671]

The Energy of an atom that emits a photon of wavelength 2.21 m is 3.028 × 10⁻¹⁹ J.
I attached the working and the answer to the question below. I hope I was able to help.
Please note that C = speed of light, ν = frequency, λ= wavelength, h = Planck's Constant

7 0

3 years ago

6. What does the symbol AH stand for?

Vesnalui [34]

the heat of reaction for a chemical reaction

4 0

4 years ago

What role does the oxidizing agent play in a redox reaction?

mr Goodwill [35]

Answer is "<span>the oxidizing agent receives electrons from the reducing agent</span><span>".

There are two types of reactants in redox reactions. One is oxidizing agent and other is reducing agent.

Oxidizing agent is a substance which helps to oxidize other substance by gaining electrons. This is also called as oxidizer. Due to the gaining electrons, oxidizing agents tend to be reduced.

Reducing agent or reducer helps to reduce other substance while loosening electrons. Hence, reducing agents tend to be oxidized.</span>

5 0

4 years ago

Identify each of the following half-reactions as either an oxidation half-reaction or a reduction half-reaction. half-reactionid

s2008m [1.1K]

Answer:

Overall balanced redox reaction :

$Ni^{2+} (aq)+Zn(s)\rightarrow Ni(s)+Zn^{2+} (aq)$

Explanation:

$Ni^{2+} (aq) +2e^-\rightarrow Ni(s)$ ..(1)

$Zn(s)\rightarrow Zn^{2+} (aq) +2e^-$ ..(2)

Oxidation reaction is a chemical reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

$X\rightarrow X^{n+}+ne^-$

Reaction number 2 is an oxidation half reaction, in which zinc is loosing 2 electrons and forms zinc ion with +2 charge.

Reduction reaction is a chemical reaction in which an atom gains electrons. Here, the oxidation state of the atom decreases.

$X^{n+}+ne^-\rightarrow X$

Reaction number 1 is a reduction half reaction, in which nickel ion with 2+ charge is gaining 2 electrons and forms nickel atoms.

Overall balanced redox reaction can be written adding (1) and (2):

$Ni^{2+}+ (aq) 2e^-+Zn(s)\rightarrow Ni(s)+Zn^{2+} (aq) +2e^-$

$Ni^{2+} (aq)+Zn(s)\rightarrow Ni(s)+Zn^{2+} (aq)$

4 0

3 years ago

Which is correct ? I’m really confused

Brilliant_brown [7]

Answer:

A. Florine has a stronger pull than Magnesium

Explanation:

Electronegativity refers to the tendency in which an tom would attract electrons to itself.

Below each element in the periodic table is their electronegativity value. Florine has the highest electronegativity value of 4.0.

Going through options;

A. Florine has a stronger pull than Magnesium

Florine = 4.0

Magnesium = 1.2

This correct

B. Hydrogen has a stronger pull than Phosphorus

Hydrogen = 2.1

Phosphorus = 2.1

This is wrong

C. Potassium has a stronger pull than Sodium

Potassium = 0.8

Sodium = 0.9

This is wrong

D. Iron has a stronger pull than Bromine

Iron = 1.8

Bromine = 2.8

This is wrong

4 0

3 years ago