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sukhopar [10]
2 years ago
11

What is the symbol of gold ​

Chemistry
2 answers:
Soloha48 [4]2 years ago
4 0

Explanation:

Tha Symbol of gold is Au.

lidiya [134]2 years ago
4 0

Answer:

symbol of gold is Au

------------------------------------------------

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H20 (s) -&gt; h20 (g)<br> endothermic or exothermic
noname [10]

Answer:

Endothermic.

Explanation:

Hello there!

In this case, it is necessary to keep in mind that exothermic processes are characterized by the release of energy and the endothermic processes by the absorption of heat. In such a way, every process from solid to liquid or gas is endothermic as they require energy to separate the molecules and therefore turn out in the phase change. On the other hand, every process from gas to liquid or solid is exothermic as heat is released to rejoin the molecules and produce the phase change.

Therefore, since solid water molecules tend to be well-arranged, it is necessary to add heat to the system to produce the phase change until gas; in such a way, this process is endothermic as energy must be absorbed by the ice.

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3 years ago
Sorry this is a bit long
Anestetic [448]

The overall balanced reaction equation is;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

<h3>What is the balanced reaction equation?</h3>

The redox reaction equation is said to be balanced when the number of electron gained is equal to the number of electrons lost.

Now;

1. Reduction and oxidation half-reactions

Zn(s) -----> Zn^2+(aq) + 2e

And

NO3^-(aq) ---->NH4^+(aq) + 3H2O(l)

2. Using the H2O and H+ to balance O and H;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

3. Balancing the electrons lost and gained; 4Zn(s) + 10H^+(aq) + NO3^-(aq) + 8e -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l) + 8e

4. The overall balanced reaction equation is;

4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)

Learn more about redox reaction:brainly.com/question/13293425

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1 year ago
When performing dimensional analysis, we usually use conversion factors. What is a conversion factor?
lora16 [44]

Answer:

A conversion factor is a variable that transforms the dimension of one variable into the terms of another variable.

Explanation:

Let be x and y two variables with diferent dimensions (units), r is a conversion if transforms the dimension of one variable into the terms of the other variable. That is:

y = r\cdot x (1)

Where:

x - Input, [input unit]

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r - Conversion factor, [output unit] per [input unit]

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Explain why spent nuclear fuel rods have to be treated as hazardous waste.
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Technically it's not such a waste anymore but it is dangerous chemicals that could kill others around it. 

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