The following reaction does not proceed to form a product: H2O + Au---> no reaction. Why is that?. . A. Gold has a higher activity than hydrogen and cannot replace it.. . B. Gold has a lower activity than hydrogen and cannot replace it.. . C. The reaction cannot occur because water is a reactant.. . D. The reaction proceeds too slowly to create products..

Answers

Answer 1
Answer: I think the correct answer from the choices listed above is option B. The following reaction does not proceed to form a product: H2O + Au---> no reaction because gold has a lower activity than hydrogen and cannot replace it. Hope this answers the question.

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What is the theoretical yield of aluminum that can be produced by the reaction of 60.0 g of aluminum oxide with 30.0 g of carbon according to the following chemical equation? Al2O3 + 3C → 2Al + 3CO

Which type of change must occur to form a compound? (1) chemical (3) nuclear(2) physical (4) phase?

Answers

The correct answer is (1) Chemical

Explanation:

A compound is the result of two or more chemical elements that bond to form new substances; for example, water is a compound because this contains two hydrogen atoms bonded to one oxygen atom. Moreover, compounds are the result of a chemical change that occurs as two or more substances interact in a chemical reaction, and this leads to the formation of bonds between the substances or the formation of compounds.

On the other hand, a physical change involves only a change in the state of the matter and a nuclear change leads to a change in the atom rather. Thus, the type of change that must occur to form a compound is a chemical change.

Let's go through each of the answers and think about why they work or don't work. 

Chemical forms compounds. 

Nuclear changes the element completely. We're going to use the sun as an example. The sun is in a state of plasma. It's really hot and has all these particles hitting into each other. The nucleus' of atoms are hitting into each other forming larger elements. It's real crazy. Nuclear is not correct. 

Physical cannot form a compound. 

Carbon-14 is an isotope of carbon. How does it differ from other forms of carbon?

Answers

Carbon-14, also known as radiocarbon, is a radioactive isotope of carbon as compared to other forms of carbon. it contains 6 protons and 8 neutrons. The presence of such in organic materials is the basis of the radiocarbon dating method to date geological samples.

Which of the following ions has a smaller size? Option 1: O2- Option 2: F- Option 3: They have the same size. Option 4: None of the above.

Answers

The fluoride ion (F-) is smaller in size than the oxide ion (O2-).

The ion with a smaller size is F- (fluoride ion) compared to O2- (oxide ion).

The size of an ion depends on the number of protons and electrons it has. Fluoride ion has one less electron than the oxide ion, making it smaller in size.

This trend can be explained by the concept of effective nuclear charge, where the positive charge of the nucleus is partially shielded by other electrons in the atom. As the atomic number increases from oxygen to fluorine, the increase in nuclear charge outweighs the additional electron-electron repulsions, resulting in a smaller size for fluoride ion.

Learn more about Ion size here:

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A skillet is lined with a thin layer of cooking oil followed by a layer of unpopped popcorn kernels. Upon heating the kernels all pop thereby escaping the skillet. Which of the following physical and/or chemical changes occurred?

Answers

Physical change.

Explanation:

  • This is a physical change.
  • The reason for escaping pops is the water caught internal parts it's bit.
  • Inside the event that the bit is warmed to a tall satisfactory temperature, this water will modify into steam. Due to the troublesome and for the preeminent parcel nonporous shell, the steam has no put to go, coming nearly in a buildup of weight internal parts the bit.
  • Once the weight gets tall satisfactory and the temperature comes to around 180 degrees Celsius (355 degrees Fahrenheit), the pops escape from the skillet or bursts and the popcorn is turned internal parts out.

Convert 205 L to ul.

Answers

Answer:

2.05 x 10⁸ uL

205000000 uL

Explanation:

Step 1: Find the conversion

1 liter (L) = 1 x 10⁶ microliters (uL)

Step 2: Set up dimensional analysis

205 L((1(10)^6uL)/(1L) )

Step 3: Multiply and cancel out units

Liters and Liter cancel out.

We are left with uL

205(1 x 10⁶) = 2.05 x 10⁸ uL or 205000000 uL

Answer: 205000000 microliter

Hope this helps!

These two compounds are in the liquid phase at 293 K a. Br₂ and Hg
b. Cl2 and F2
c. NH4^{+} and H₃O^{+}
d. Fe and Co
e. Diamond and graphite

Answers

It should be br and hg