What is first ionization energy

Answers

Answer 1

Answer: Hope this helps...Definition. The first ionisation energy is the energyrequired to remove the most loosely held electron from one mole of gaseous atoms to produce 1 mole of gaseous ions each with a charge of 1+.

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Heat, like work, is an energy transfer measured in

Answers

Heat, like work, is an energy transfer measured in:

joules.......I hope this helps

In kinetics, the order of a reactionA)depends on the rate constant
B)can be deduced from the balanced equation for the reaction
C)must be measured experimentally
D)depends on the concentrations of reactants
E)is the inverse of the entropy of the system

Answers

I think it should be C. You can't always look at the chemical equation of a reaction and tell what order the over all reaction will be. To do this, you need to preform experiments that have some concentrations held constant while changing others to see how the concentrations affected the rate. After enough trials with enough concentrations held constant and changed, you will be able to determine the order of each reactant which will give you the order of the overall reaction.

I hope this helps. Let me know in the comments if anything is unclear.

How would one convert 36 yd to centimeters 2.54 cm = 1 in)?

Answers

D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.

What are centimetres?

A metric unit of length, equal to one-hundredth of a metre.

To convert a yard measurement to a centimetre measurement, multiply the length by the conversion ratio. The length in centimeters is equal to the yards multiplied by 91.44.

D is the correct process to convert 36 yds to centimetres 2.54 cm = 1 in.

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Answer:

Explanation:

A P E X

Which of the notations below is another way to write the name of the following nuclide?A.iodine-53

B.iodide-53

C.iodide-127

D.iodine-127

Answers

Answer: D.iodine-127:

Explanation:

1) As per the definition of nuclide, it is the atomic spieces (the atom) characterized by the nucleons (protons and neutros).

2) To notation for a nuclide is the name of the atom followed by a hypen (without blank spaces) and the mass number.

3) The mass number is the sum of protons and neutrons.

4) From that, you can tell this about the four choices given:

A.iodine-53: is not correct because that would mean that the mass number is 53, which cannot be right as the atomic number of iodine is 53 meaning that it has 53 protons, and so that notation is not including the neutrons.

B.iodide-53: is not correct because the name of the atom is iodine, not iodide (also the mass number cannot be for the same reason explained above)

The name iodide is reserved for the ions from iodine not for the atom.

C.iodide-127: incorrect due to the name iodide, for the same reason explained above.

D.iodine-127: this is correct choice. It is the name of the isotope of the iodine with mass number 127, which means that the atom has 53 protons and 74 neutrons (53 is the atomic number and 74 is calculated from 127 - 53)

Answer:

iodine-127

Explanation:

I did a quiz and it was correct.

The energy needed to get a reaction started is thea. enzyme energy.
b. activation energy.
c. catalyst energy.
d. chemical energy.

Answers

Activation energy is the energy needed to start a chemical reaction. The correct answer to the given question is option b. activation energy.

The energy needed to get a reaction started is called the activation energy. It is the minimum amount of energy required for a chemical reaction to occur. Activation energy is needed to break the existing bonds in reactant molecules and form new bonds to produce product molecules.

The correct answer to the given question is option b. activation energy.

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The energy needed to get a reaction started is the activation energy.

A catalyst speeds up a reaction, as well as an enzyme, and chemical energy is just a form of energy.

Answer: Activation energy

Why do comets have tails

Answers

Answer:

Comets are composed of ice, dust and frozen gases. The core of the comet is known as nucleus which is formed of rocks and frozen gases. Coma is the atmosphere of the comet. As the comet enters the inner solar system, the coma expands due to sublimation of frozen gases. As it nears the sun, the coma extends backwards and forms a long tail. It extends backwards due to the solar wind. The charged particles from the sun take away the evaporated material and dust of the comet backwards forming tail.

As a comet approaches the Sun, it starts to heat up. The ice transforms directly from a solid to a vapor, releasing the dust particles embedded inside. Sunlight and the stream of charged particles flowing from the Sun – the solar wind – sweeps the evaporated material and dust back in a long tail.

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