What is the average atomic mass of the isotopes shown in the table?
Isotope Abundance (%) Mass of Isotope (amu)
Isotope-A
54.0
17.984
Isotope-B
32.0
18.985
Isotope-C
14.0
19.982

Answer:

its the first part in mass of sodium

Explanation:

:)

Answer:

Most of the mass of an atom is found in the nucleus.

Explanation:

Answer: 10,000,000,000 kilometers

Explanation:

All the planets in our solar system come into view. But at this distance, only Jupiter and Saturn would be visible with the naked eye.

Answer: Nuclear change is distinct from chemical change in that elements change. In the nuclear change the elements can change from one to another. (Nuclei can break apart to form smaller elements.)

Explanation:

Answer:

A nuclear change is a process by which nuclei of certain isotopes change spontaneously or are forced to change to two or more different isotopes.

Explanation:

The three main types of nuclear change in the matter are radioactive natural disintegration, nuclear fission, and nuclear fusion.

I like blowing up stuff too

Answer:

Fractional distillation

Explanation:

The process of separating petroleum products into its fractions is called fractional distillation.

Fractional distillation is a method of separating a mixture of substances based on the differences in their boiling points.

Petroleum is a mixture of hydrocarbons separated in a large fractionation tower having many trays maintained at different temperatures.

As the vapor containing the petroleum mixture ascends the fractionation tower, the mixture is separated at each tray to yield the various fractions of petroleum.

Answer:

84 g of N₂        

Explanation:

We begin from the reaction:

N₂O₄  +  2N₂H₄ →  3N₂  + 4H₂O

  1st step: Find out the limiting reactant.

We convert the mass to moles.

       276 g . 1mol/ 92g = 3 moles of N₂O₄

64 g . 1mol / 32g = 2 moles of hidrazine  

Limiting reactant is the hydrazine. Ratio is 1:2, then for 3 moles of tetroixde I may need 6 moles of N₂H₄. (But I only have 2).

To determine the grams of produced nitrogen we see stoichiometry (2:3)    

2 moles of hydrazine can produce 3 moles of N₂

Definetaly our 2 moles make 3 moles of gas.

We convert the moles to mass.

3 mol . 28g /1mol = 84 g of N₂                                                                                                

Answer:

Yes

Explanation:

It is important to learn about in science

Answer : Yes

Explanation:

One reason for the importance of kinetics is that it provides evidence for the mechanisms of chemical processes. Besides being of intrinsic scientific interest, knowledge of reaction mechanisms is of practical use in deciding what is the most effective way of causing a reaction to occur.

According to the enthalpy diagram true statement is that Arrow C indicates that third intermediate reaction is exothermic in nature.

Enthalpy of the reaction gives idea about the exchange of heat during the whole chemical reaction process.

Hence Arrow C indicates that the third intermediate reaction is exothermic is true statement.

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Answer: c

Explanation:

N=9.933

Explanation:

no of mole = m÷mr

then ,no of molecules=n×la

The question is incomplete, The complete question is;

Scientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below. What experimental evidence led to the development of this atomic model from the one before it?

Answer:

A few of the positive particles aimed at a gold foil seemed to bounce back.

Explanation:

This model of the atom was proposed by Ernest Rutherford and was called the planetary model of the atom.

This model is based on an experiment using a gold foil on which alpha particles were focused. Most of the alpha particles passed through the foil. Some of the alpha particles were scattered at large angles and a few seemed to bounce back.

This led to the conclusion that the atom has a massive positive core around which electrons move as planets move around the sun.

Answer:

It is A

Explanation:

Answer:

the breaking down of rock is known as weathering

Answer:

Copper(i) nitrate

Explanation:

That is the correct name.

Answer:

Molecular Formula

Explanation:

Answer:

B

Explanation:

Answer:

the correct answer is B

Explanation:

Answer:

Explanation:

Here's the complete question:

A chemist analyzes two samples.One sample contains 14g of element x and 6.0g of element y.The second sample contains 28g of element x and 6.0g of element y. Does it appear that the two samples are the same substance?

The two samples that we are given in the question are different. They are not the same thing because we can deduce that their components ratio are different.

Sample One contains 14g of element x and 6.0g of element y. The ratio of element x to y is 14/6 = 7/3 = 7:3.

Sample Two contains 28g of element x and 6.0g of element y. The ratio of element x to y is 28/6 = 14/3 = 14:3.

Therefore, they have different ratio for their components and are therefore not thesame.

Answer:

1. 1 mole of NaCl.

2. 1 mole of H₂O.

Explanation:

The balanced equation for the reaction is given below:

HCl + NaOH —> NaCl + H₂O

From the balanced equation above,

1 mole of HCl reacted with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of H₂O.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted completely with 1 mole of NaOH. Therefore, HCl is the limiting reactant and NaOH is the excess reactant since we have 3.6 moles of NaOH.

1. Determination of the amount of NaCl produced from the reaction.

NOTE: The limiting reactant is used to determine the maximum amount produced since all of it is consumed in the reaction.

The limiting reactant is HCl and the amount of NaCl produced can be obtained as follow:

From the balanced equation above, we can see that 1 mole of HCl reacted to 1 mole of NaCl.

Thus, 1 mole of NaCl was produced.

2. Determination of the amount of H₂O produced from the reaction.

From the balanced equation above, it is evident that 1 mole of HCl reacted to produce 1 mole of H₂O.

Thus, 1 mole of H₂O was produced.

Answer:

Kc = 0.333

Explanation:

First of all we state the equilibrium reaction:

C₂H₅OH(aq) + CH₃CO₂H(aq)  ⇄  CH₃CO₂C₂H₅(aq) + H₂O(l)

Initially we start with 1 mol of alcohol and 1 mol of acid. After the reaction goes complete, 0.25 moles of acid have been consumed. As ratio is 1:1, we also consumed 0.25 moles of alcohol. Then, in the product side we finally produced 0.25 moles of water and 0.25 moles of ethyl acetate.

How many moles are available in the reactant side, after the equilibrium?

1 mol - 0.25 moles (that have been reacted) = 0.75 moles.

To determine Kc, we need molar concentrations, so let's see M in products and reactants:

0.75 mol / 0.25 L = 3 M

0.25 mol / 0.25 L = 1 M

We needed to convert 0.250 mL to L → 0.250 mL . 1L/ 1000mL = 0.250 L

Let's determine expression for Kc:

Kc = [H₂O] . [CH₃CO₂C₂H₅]  / [C₂H₅OH] . [CH₃CO₂H]

1 . 1 / 3 . 3 = 1/9 → 0.333

0.026 moles is the right answer.

We have that for the Question "How many moles of xenon gas are necessary to exert a 0.64atm pressure in an 8.5L container at 300.0K?" it can be said that  moles of xenon gas is

n=0.22moles

From the question we are told

How many moles of xenon gas are necessary to exert a 0.64atm pressure in an 8.5L container at 300.0K?

Generally the equation for the ideal gas is mathematically given as

[tex]n=\frac{Pv}{RT}\\\\n=\frac{0.64*8.5}{0.08206*300}[/tex]

n=0.22moles

Therefore

How many moles of xenon gas are necessary to exert a 0.64atm pressure in an 8.5L container at 300.0K is

n=0.22moles

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Answer:

Electrons

Explanation:

Protons and Neutrons have an amu of 1

Answer:

c. Electrons

Explanation:

Electrons are found outside the nucleus and are the lightest.

Answer:

Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth. Most precipitation falls as rain.

Explanation:

Answer:

I'm sorry but there is no diagram above.

Answer:

Systems thinking allows us to understand all the parts that make up the whole system.

Explanation:

Just took the test

The systems thinking important because, Systems thinking allows us to understand all the parts that make up the whole system. Therefore, option C is correct.

By considering the world's complexity in terms of links and entire rather than breaking it down into its component components, systems thinking helps us make sense of how complicated the world is. It has been applied as a method for investigating and producing efficient action in challenging situations.

By using a deeper grasp of the surrounding structure and its constituent parts rather than relying just on previous events, systems thinking gives a technique to more accurately forecast future outcomes.

Systems thinking is a discipline in management that focuses on understanding a system by looking at the connections and interactions between the different parts that make up the entire of that defined system. The concept of the "entire system" is a way of looking at an entire organization in relation to its surroundings.

Thus, option C is correct.

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Answer:

b it has different kinds of atoms

Answer:

it has different kind of atom

Explanation:

i think

Answer:

The enthalpy of solution for AgNO3 is positive because the temperature of the solution decreases (the dissolution is endothermic). Hsol = Hsolute + Hsolvent + HmixHsolute and Hsolvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.

Answer:

the enthalpy of solution for agno3 is positive because the temperature of the solution decreases. (the dissolution is endothermic.)

Delta H sol=delta HSolute +delta H solvent +delta H mix

HSolute and H solvent are endothermic because energy is required to overcome intermolecular forces and separate solute and solvent particles.

H mix is exothermic because energy is released when intermolecular forces form between solute and solvent particles.

if the overall enthalpy of solution is positive, then HSolute + H solvent must be larger in magnitude than H mix.

Explanation:

correct on edge2021

Answer:

The name of that molecule should be 1-pentyne

so your answr should be B

Explanation:

Molecules are species made up of atoms. The given molecule in the figure is 1-pentyne. Thus, option B is correct.

1-Pentyne is a chemical compound with the formula C₅H₈, and an internal alkyne group between the first and the second carbon atom.

The molecules consist of twelve bonds including the bonds between the carbon-carbon, and carbon-hydrogen. There is one triple or the alkyne bond present and five carbon hence the name of the molecule is 1-Pentyne.

Therefore, the molecule is option b. 1-Pentyne.

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Answer:

D

Explanation:

why i say that is because take for example a volcano, when you make a model, you'll see what takes place in a real eruption but in real life the lava would burn things in its path, the model volcano may not. That's just an example

Answer:

D

Explanation:

I got it right on study island

Answer:

9.8 m/s2

Explanation:

That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.

Answer:

3SiO2  +  2CaC2 ------>   3Si  +   2CaO  +  2CO2

Explanation: