What is the energy; in J, of light that must be absorbed by a hydrogen atom to transition an electron from n = 3ton = 7?

The group of organic molecule polymers with the most complex and

diverse three-dimensional structure is Protein.

This is a biological macromolecule which comprises of one or more chains

of amino acids. They are very important as they are involved in many

biological activities in the body.

Protein has the most  complex and diverse three-dimensional structure

because there are over twenty amino acids which are arranged uniquely

to form different types of protein.

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When the moving car brakes to the stop the kinetic energy of car will be converted to the heat energy.

The mechanical brake will be applies to the friction force and it convert the kinetic energy of the car into the thermal energy that which then dissipates on atmosphere. The process of the braking will follow the principle of the conservation of the energy.

The conservation of the energy is the principle, that is expressed in its the most general form, and it is the first law of the thermodynamics. The first law of thermodynamics explains that "the energy of the universe remains the same."

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This question is incomplete, the complete question is :

A car in motion has kinetic energy. A moving car is suddenly stopped. Why does the car stop? Where did the energy go?

Answer:

Natural frequency

Explanation:

Answer:

Resonance

Explanation:

The term that the scientist would use in this case is partial pressure. Option D

The pressure that one particular gas component within a mixture of gases exerts is referred to as partial pressure. It is the pressure that the gas would experience at the same temperature if it were the only thing in the entire volume.

When researching gas mixtures, such as in gas laws, gas phase equilibria, and gas collecting methods, partial pressures are extremely crucial for the gas.

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Answer:

6.0 mol LiNO₃

Explanation:

First we need to determine which reactant is the limiting reactant:

We calculate with how many Ca(NO₃)₂ moles would 3.0 moles of Li₃PO₄ react, using the stoichiometric coefficients of the reaction:

There are not as many Ca(NO₃)₂ moles, so Ca(NO₃)₂ is the limiting reactant.

Using the number of moles of the limiting reactant, we calculate how many moles of LiNO₃ would be formed:

The correct structure that corresponds to the name in the image above is structure A. Details about hydrocarbons can be found below.

Alkanes are organic compound that belongs to any acyclic saturated hydrocarbon e.g. methane, ethane, etc.

Alkanes have a single carbon bond and can be attached to by certain compounds. Methyl is a compound with the formula; CH3.

Therefore, the correct structure that corresponds to the name in the image above is structure A.

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Answer:

C

Explanation:

It was right on acellus

Answer: 20.9 billion years.

Explanation: To estimate the age of the rock, we can use the fact that the half-life of uranium-238 is 4.47 billion years. This means that half of the uranium-238 in the rock would have decayed into lead-206 after 4.47 billion years, and half of what remains would decay in the next 4.47 billion years, and so on.

If 20% of the uranium-238 in the rock has decayed into lead-206, then 80% of the original uranium-238 is still present in the rock. This means that the rock has gone through one half-life of uranium-238 decay, and we can estimate its age by using the graph on page 253.

According to the graph, the ratio of lead-206 to uranium-238 after one half-life is approximately 0.027. This means that the rock contains 0.027 times as much uranium-238 as it did originally, and the remaining 80% of the uranium-238 corresponds to 0.8 times the original amount.

Therefore, we can estimate the original amount of uranium-238 in the rock as follows:

Original amount of uranium-238 = (0.8) / 0.027 = 29.63 times the current amount

Next, we can use the fact that each half-life corresponds to a reduction in the amount of uranium-238 by a factor of 2, to estimate the number of half-lives that have passed since the rock formed:

Number of half-lives = log2(29.63) = 4.88

Finally, we can estimate the age of the rock as follows:

Age of the rock = (4.88) x (4.47 billion years per half-life) = 20.9 billion years

Therefore, we can estimate that the age of the rock is approximately 20.9 billion years.

see the picture attached to my answer

Answer:

\(K_{2} O+2HNO_{3}--> 2K_{2} NO_{3} + H_{2} O\)

Explanation:

Answer:

The answer is

Plant also use cellular respiration

Answer:

B - Plants also use cellular respiration.

Explanation:

Did the test.

Answer:

6.5 mg/L.

Explanation:

Step one: write out and Balance the chemical reaction in the Question above:

NiCl2 + 2AgNO3 =====> 2AgCl + Ni(NO3)2.

Step two: Calculate or determine the number of moles of AgCl.

So, we are given that the mass of AgCl = 3.6 mg = 3.6 × 10^-3 g. Therefore, the number of moles of AgCl can be calculated as below:

Number of moles AgCl = mass/molar mass = 3.6 × 10^-3 g / 143.32. = 2.5118 × 10^-5 moles.

Step three: Calculate or determine the number of moles of NiCl2.

Thus, the number of moles of NiCl2 = 2.5118 × 10^-5/ 2 = 1.2559 × 10^-5 moles.

Step four: detemine the mass of NiCl2.

Therefore, the mass of NiCl2 = number of moles × molar mass = 1.2559 × 10^-5 moles × 129.6 = 1.6 × 10^-3 g.

Step five: finally, determine the concentration of NiCl2.

1000/ 250 × 1.6 × 10^-3 g. = 6.5 mg/L.

The mass of butane that can burn excess O2 to produce 18.4kj of heat energy is 6.47g. That is option B

The correct coefficient for the balanced equation is= 2,1 --> 4,1. That is option D

The molar mass of butane = 58.12 g/mol

For the balanced equation, molar mass of butane

= 2×58.12 = 116.24g/mol

If 116.24g = 330KJ of heat

X g = 18.4kj

Make X the subject of formula,

xg = 116.24 × 18.4/330

xg= 2138.816/330

xg= 6.47g

Therefore, The mass of butane that can burn excess O2 to produce 18.4kj of heat energy is 6.47g.

The balance equation from the question is

2K2Cr2O7 + SnCl4 ---> 4KCl + Sn(Cr2O7)2

Which has the coefficient of 2,1 --> 4,1

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Answer:

1.) Single Displacement Reaction

2.) Synthesis Reaction

3.) Single Displacement Reaction

4.) Decomposition Reaction

5.) Double Displacement Reaction

Explanation:

Single Displacement Reaction: a reaction in which an element is swapped out for another in a molecule

Double Displacement Reaction: a reaction in which the cation of one molecule is swapped out with the cation of another

Decomposition Reaction: a reaction in which a molecule breaks down into smaller molecules/atoms

Synthesis Reaction: a reaction in which atoms or molecules come together to create a larger molecule

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question we have

mass = 2.835 × 34

We have the final answer as

Hope this helps you

The volume of the flexible container that holds a sample of hydrogen gas at 153 kPa is 1.51L (option B).

The volume of a substance can be calculated using the following formula:

P1V1 = P2V2

Where;

153 × 3 = 304 × V2

459 = 304V2

V2 = 459/304

V2 = 1.51L

Therefore, the volume of the flexible container that holds a sample of hydrogen gas at 153 kPa is 1.51L.

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Answer:

the correct answers are A,D,E, and G

Explanation:

The name of the three compounds are Disulfur Dichloride, Potassium nitrate and Ammonium bromide respectively.

1. The name of the first compound is Disulfur Dichloride.

Disulfur Dichloride is a type of inorganic compound comprise of sulfur and chlorine. There are also many other names which we can be used like sulfur monochloride, disulphur dichloride and sulphur monochloride. It is used to show C-S bonds.

2. The name of the second compound is Potassium nitrate.

Potassium nitrate is a compound that belong to the alkali metal nitrate. Potassium nitrate is also known as Indian saltpetre. The potassium nitrate is present in the nature but in the form of mineral. The potassium nitrate is used for making the explosives, matches, rocket fuel and fireworks.

3.The name of the third compound is Ammonium bromide.

Ammonium bromide is a type of compound that contains ammonium salt of hydrobromic acid. It can melt easy on providing heat. It is also soluble in water. It gives yellow colour. Ammonium bromide is the weak acid.

So we can conclude that the name of the three compounds are Disulfur Dichloride, Potassium nitrate and Ammonium bromide respectively.

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Explanation:

Andresiaは13.1マイルの長さのレースを走っています。彼はすでに1.1マイル走っています。アンドレスが走るために残っているマイル数を再確認する

Answer:

3.3 * 10^-12

Explanation:

The balanced equation of the reaction is;

2H+(aq) + Cu(s) ---------> H2(g) + Cu2+(aq)

Hence two electrons were transferred so n=2

E°cell = E°cathode - E°anode

E°cell = 0 V - 0.34 V

E°cell = - 0.34 V

Then;

E°cell = 0.0592/n log K

Substituting values;

- 0.34 = 0.0592/2 log K

- 0.34/0.0296 = log K

-11.486 = log K

K = Antilog (-11.486)

K = 3.3 * 10^-12

Answer:

a top predator, fighting

Answer:

the answer is 4 hope this helps

Answer:

flood

Explanation:

i put typhoon and i got it wrong, volcanoe is not a natural disaster and even ifit was they are nowhere near florida, and an avalanche cant happen in florida because there is no snow, and learn from my mistake and put FLOOD, not typhoon.

Answer:

step3:

aluminum- 11.98

copper-12.14

iron- 12.31

lead- 12.46

step5: 12.46, 52.31, 39.85

step7: 100, 22.4, 27.1, 4.7, 72.9

step5: 12.26, 52.49, 40.13

step7: 100, 22.7, 24.6, 1.9, 75.4

step5: 12.42, 52.66, 40.24

step7: 100, 22.5, 24.9, 2.4,75.1

step5: 12.34, 51.99, 39.65

step7: 100, 22.6, 23.3, 0.7, 76.7

step8: 0.90,0.35,0.44,0.12

Answer:

Nacio, is contained in 400 grams of water whose molality ... Molality= moles of solute / mass of solvent in Kg Now molality=0.60 Mass

Explanation:

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The correct order of the five steps of the scientific method is as follows:

State problem

Form hypothesis

Conduct experiment

Interpret data

Draw conclusion.

The scientific method is a systematic approach used by scientists to investigate and understand the natural world. The five steps of the scientific method, in their logical order, are as follows:

State problem: In this step, the scientist identifies and defines a specific question or problem to be investigated. The problem should be clear and well-defined to guide the rest of the scientific process.

Form hypothesis: A hypothesis is a proposed explanation or prediction for the problem stated in step one. It is an educated guess that can be tested through experiments and observations. The hypothesis should be based on prior knowledge and observations.

Conduct experiment: In this step, the scientist designs and performs experiments to test the hypothesis. The experiment is carefully planned and executed, and data is collected through observations and measurements.

Interpret data: Once the experiment is completed, the scientist analyzes the collected data. This involves organizing, graphing, and statistically analyzing the data to identify patterns and trends.

Draw conclusion: Based on the interpretation of the data, the scientist draws conclusions about whether the hypothesis is supported or not. The conclusions should be objective and supported by evidence obtained from the experiment.

It's important to note that while these steps are presented in a linear order, the scientific process is often iterative, with scientists revisiting and refining hypotheses, conducting further experiments, and building upon existing knowledge.

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Answer:

MgBr(aq) + (NH4)3PO4(aq) -------> NH4Br(aq) + Mg3(PO4)2(s)

Explanation:

Answer:

velocity

Explanation:

The definition of acceleration is: Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.

Explanation:

B) 3CuCl2+2AL..….2AlCl3+3Cu

hope it helps.

Balanced Equation:

3CuCl₂ + 2Al = 2AlCl₃ + 3Cu

The calcium symbol is Ca. its atomic number is 20 and it is an alkaline earth metal. It is the fifth most abundant element on Earth.

Ca is on the second column from the left to right. It is a