CHEMISTRY HIGH SCHOOL

What term best describes the rate of radioactive decay for a particular radioactive element?A. fast
B. slow
C. variable
D. constant

Answers

Answer 1
Answer:

Answer:

correct answer is option C (constant)

Explanation:

Radioactive decay of radioactive element occur at known rates, the unit of radioactive decay is called half-life. The amount of time a radioactive element takes for half of the parent atoms to decay is known as half-life of a radioactive element

During Radioactive decay radioactive elements emits a particle. It's impossible to predict exactly when a given atom of a substance will emit a particular particle, but the decay rate of a radioactive element over a long period of time is constant.

By radioactive decay scientist can determine the age of that particular element. If radioactive decay will vary than age cannot be determined from radioactive decay.
Answer 2
Answer: The rate of radioactive decay for a particle radioactive element is constant. 

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In atomic emissions spectroscopy, the atom(s) absorb energy, become excited, and release energy in what form?

Answers

In atomic emission spectroscopy, the atoms absorb energy, become excited, and release energy in the form of light.

12a. Do i need to find the morality of each ion in the solution to get to the moles? Or do i just do AlCl3

Answers

You just use the morality of the solution, you found out that you have 0.0046mol (about 0.005mol0 of AlCl3, so then since there is 1 Al in a single molecule, you have the number of moles of aluminum, but since there is Cl3 (3 atoms of chlorine per molecule), just multiply the number of moles of molecules by the number of atoms of that type inside a single molecule, to get [Cl-] = 0.0138mol (or round to 0.014)

What does N2O3 mean in science

Answers

2 nitrogen and 3 oxygen atoms share a covalent bond, making dinitrogen trioxide
n2o3 is dinitrogen trioxide

which half reation equation represents the reduction of an iron(II) ion? Fe+2->Fe+3 + e- Fe+2 +2e- ->Fe Fe+3 +e- -> Fe+2 Fe->Fe+2 +2e-

Answers

Fe³⁺ +e⁻ -> Fe²⁺ is the half reaction equation represents the reduction of an iron(II) ion

What is Reduction Reaction ?

When an element or a compound gain electron , decreasing its oxidation number is called reduced and the half cell reaction is called Reduction reaction.

Fe³⁺ +e⁻ -> Fe²⁺ , Option C

In this reaction the Iron is gaining electron and the charge is getting reduced from +3 to +2 .

Therefore this half reaction equation represents the reduction of an iron(II) ion.

To know more about Reduction Reaction

brainly.com/question/19528268

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Fe₂⁺  + 2e =  Fe

reduction of an iron(II) ion

Answer b

What is the Roman numeral that should be used in the following: silver (_______) sulfide? A. No Roman numeral should be used here. B. I C. III D. II

Answers

Answer: The correct answer is Option B.

Explanation: The compound given to us is Ag_2S. To write the IUPAC name for this compound, we need to follow some rules:

1. First write the name of the cation with its oxidation state in roman numbers.

2. Then write the name of the anion which may be a polyatomic ion or a non-metal.

3. The anion is used with a suffix '-ide'. Example: For chlorine, the anion would be named as chloride, for sulfur, the anion would be sulfide.

For the given compound, 2 silver atoms are needed to neutralize the charge on 1 sulfur atom.

Hence, the oxidation number of silver atom is '1'. So, the IUPAC name for the compound will be silver (I) sulfide.

Therefore, the correct option is B.
The answer is I

The correct way of writing this would be silver(I) sulfide, but silver sulfide without the (I) is also OK because it isn't always writte, nor is it necessary to write the (I). 
 

Consider three gases: Ar, SF6, and Cl2. If 50.0 grams of these gases are placed in each of three identical containers, which container will have the highest pressure? The volume and temperature of all three containers are the same.

Answers

The ideal gas law:
pV=nRT \Rightarrow p=(nRT)/(V)
p - pressure, n - number of moles, R - the gas constant, T - temperature, V - volume

The volume and temperature of all three containers are the same, so the pressure depends on the number of moles. The greater the number of moles, the higher the pressure.
The mass of gases is 50 g.

Ar \nM \approx 39.948 \ (g)/(mol) \nn=(50 \ g)/(39.948 \ (g)/(mol)) \approx 1.25 \ mol \n \nSF_6 \nM \approx 146.06 \ (g)/(mol) \nn=(50 \ g)/(146.06 \ (g)/(mol)) \approx 0.34 \ mol \n \nCl_2 \nM=70.9 \ (g)/(mol) \nn=(50 \ g)/(70.9 \ (g)/(mol)) \approx 0.71 \ mol

The greatest number of moles is in the container with Ar, so there is the highest pressure.
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