Combustion reactions take place between fuel and oxygen and produce carbon dioxide and water. Balance
the following combustion reaction.

This type of reaction between potassium carbonate (k2co3) and nitric acid (HNO3) is Acid-base neutralization reaction.

2HNO3+K2CO3⇒ 2KNO3+H2O+CO2

Potassium carbonate is a weak base whereas Nitric acid is a very strong acid. The reaction between them neutralizes each other forming water. The weak nitric acid reacts with the strong potassium base to produce salt, water and carbon dioxide which is given off.

Molecular ratio of reactants is 2 : 1.

All phases are represented in the equation: aq for aqueous, l for liquid and g for gas (notice how they are written in subscript).

The reaction is an acid-base neutralization reaction.

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Answer:

A. the burning of fossil fuels within the Sun

Explanation:

Answer:condensation

Condination

Explanation:

The general molecular formula for alkynes is \(C_{n} H_{2n-2}\). These are non polar as it contains only carbon and hydrogen.

Alkynes are defined as the organic compound molecules made of the functional group carbon-carbon triple bonds.  The molecular formula of  alkynes is \(C_{n} H_{2n-2}\). Alkynes are unsaturated hydrocarbons. Alkenes have the suffix –ene and alkynes has the suffix –yne. The suffix is used when there is only one alkyne in the molecule. Alkynes undergo same reactions in many reactions as alkanes. It can react twice because of the presence of the two p-bonds in the triple bond. Alkynes contains only carbon and hydrogen. These are nonpolar.  These are not soluble in water and are less dense than water.

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The complete question is,

The general molecular formula for alkanes is cnh2n 2. what is the general molecular formula for alkynes?

The mass defect (deficit) in amu/atom is 0.109879 amu/atom of an atom of 105In has a mass of 104.914558 amu.

The mass of an atom is the sum of the masses of its protons, neutrons, and electrons.

The mass of an atom is generally less than the sum of the masses of its subatomic particles.

The difference between the sum of the masses of its protons, neutrons, and electrons and the mass of an atom is

known as the mass defect.

Mass defect = [(Z × mp + N × mn) − M]

where, Z = the atomic number; N = the number of neutrons; mp = mass of proton; mn = mass of neutron; and M = mass of nucleus.

In this case, mass defect = [(49 × 1.007825 + 56 × 1.008665) − 104.914558] amu/atom = 0.109879 amu/atom.

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Answer:

Fossil fuels are formed when living organisms die, and are buried under a tick layer of earth materials over a long time, usually over million s of years. Fossil fuels are formed under intense heat and pressure on the dead organisms due to the earth layer that has accumulated on the organisms over the years. The type of fossil fuels formed in a particular region depends on the type of organism that has lived in that region over the years, and the climate of the region. Regions with lush, swamp forests with many trees have enough  organic material to make coal over the years. The United states however still depend on the importation of other fossil fuel that are in minimal quantity in the country. Most regions have coal, because they once had forests and animals on them but countries like the United States and some other countries have them in abundance, because these regions had a huge amount of lush, swamp forests with many trees. Japan lacks significant domestic reserves of fossil fuel, except coal, and must import substantial amounts of crude oil, natural gas, and other energy resources, because of its climate and the fact that it is an island nation.

Fossil fuels are distributed unevenly because their formation requires precise conditions that aren’t found everywhere. For fossil fuels to form, they need to be subjected to anoxic (lacking oxygen) conditions that allow for great pressure, such as those found beneath the ocean floor.nation:

Amino acids can be converted into triglycerides to provide additional energy and generate body fat. Triglycerides are the primary form of stored fat in the body and are composed of three fatty acid molecules attached to a glycerol backbone. Here option C is the correct answer.

The process by which amino acids are converted into triglycerides is known as lipogenesis. During lipogenesis, excess amino acids that are not needed for protein synthesis can be broken down and converted into intermediate molecules, such as acetyl-CoA.

Acetyl-CoA serves as a building block for fatty acid synthesis. Through a series of enzymatic reactions, acetyl-CoA is combined with other molecules to form fatty acids, which are then incorporated into triglycerides.

This conversion primarily occurs in the liver, although adipose tissue (fat cells) also plays a role in storing triglycerides. When the body requires energy, triglycerides can be hydrolyzed back into fatty acids and glycerol through a process called lipolysis. Fatty acids can then be metabolized and used as a source of energy through beta-oxidation.

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Complete question:

Which of the following substances do amino acids get converted into to provide additional energy and generate body fat?

a) Glucose

b) Glycogen

c) Triglycerides

d) Ketones

The flowcharts best outlines the conversion of energy is Kinetic energy to mechanical energy to electrical energy.

Kinetic energy occurs when the object posses energy due to its motion while on the other hand, mechanical energy is the sum of an object's kinetic and potential energy.

The flowing water have kinetic energy and when it falls from a certain height, it has potential energy and when the turbines move electric energy is produced.

So we can conclude that the flowcharts best outlines the conversion of energy is Kinetic energy to mechanical energy to electrical energy.

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Answer:

20

Explanation:

calculated saturated solutions

1. The balanced equation for the reaction is:

Cu + I₂ -> CuI₂

2. The percentage yield of the reaction is 68%

1. The balanced equation for the reaction between copper and iodine to produce copper(II) iodide is:

Cu + I₂ -> CuI₂

2. How do I determine the percentage yield?

First, we shall obtain the theoretical yield. This can be obataned as follow:

Cu + I₂ -> CuI₂

From the balanced equation above,

253.8 g of I₂ reacted to produce 317.35 g of CuI₂

Therefore,

57.8 g of I₂ will react to produce = (57.8 × 317.35) / 253.8 = 72.3 g of CuI₂

Now, we shall determine the percentage yield of the reaction. Details below

Percentage yield = (Actual /Theoretical) × 100

Percentage yield of reaction = (49.2 / 72.3) × 100

Percentage yield of reaction = 68%

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Answer:

When a solid turns directly to a gas this is called sublimation. From the graph it can be seen if the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.

Explanation:

Answer:If the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.

Explanation:

Parentheses help set off and separate the additional or explanatory information from the main sentence. They provide a way to include non-essential or supplementary details without disrupting the grammatical structure of the sentence.

Parentheses are used to set off parenthetical information or elements in a sentence. Here are some situations where parentheses are commonly used:

Clarifying or providing additional information:

The concert (which was held outdoors) was canceled due to bad weather.

John's house (the blue one on the corner) is up for sale.

Inserting comments or asides:

The movie was amazing (I highly recommend it!).

The team won the championship (finally!).

Including citations or references:

According to Smith et al. (2020), the results showed significant improvement.

The study found a correlation between sleep and cognitive function (Johnson, 2019).

Presenting abbreviations or acronyms:

The United Nations (UN) is an international organization.

The CEO (Chief Executive Officer) will be giving a speech.

Indicating mathematical operations or equations:

5 + (3 × 2) = 11

(x - 3)² + (y + 2)² = 25

In these cases, parentheses help set off and separate the additional or explanatory information from the main sentence. They provide a way to include non-essential or supplementary details without disrupting the grammatical structure of the sentence.

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I think the answer is pentan-2-ol

Answer:

The empirical formula is the simplest form;

Given:

Oxygen O at 94.1% and

H at 5.9%

Assume 100grams.

94% = 0.941 x 100gm. = 94.1 gm x 1mole/16gm. = 5.88 moles of O

5.9% = 0.059 x 100gm. = 5.9gm. X 1moleH/1.002gm. = 5.88 moles of H

There is one mole of O for each mole of H so the empirical formula is \(O_1H_1\)

and written as OH.

Explanation:

\(given \: that \: oxygen \: by \: 94.1\% (.941)\\ hydrogen \: by5.9\%(.059) \\ in \: 100gram \: \\ oxygen = 100 g\times .941 = 94.1 \times \frac{1(mol)}{16g} \\ = 5.88moles \: of \: oxygen \\ in \: hydrogen \: = .059\times 100 = 5.9 \times \frac{1mol}{1.002gram} \\ = 5.88mole \: of \: hydrogen \\ \: so \: here \: \: both \: oxygen \: andhydrogen = 5.88 \\their \: ratio = 1 \: 1 \\ so \: emparical \: formula = oh \\ thank \: you\)

Answer:

The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.

Explanation:

Plato answer

The conversion of substance A to substance B will happen extremely slowly.

A molecule is two or more atoms connected by chemical bonds, which form the smallest unit of a substance that retains the composition and properties of that substance.

The conversion of substance A to substance B will happen extremely slowly because of the very high activation energy that each molecule must obtain to convert.

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Answer:

-water is collected from nearby water holes and put in a water tower after it's clean

Answer:

Your water comes from rivers and streams.

Explanation:

The water is collected from rivers and stream and gets delivered from the storage tank to the pipes of our house

Answer:

The scientist is observing the electrical power of a superconductor.

Explanation:

if it helped u please mark me a brainliest :-/

Answer:

The formation of a precipitate

Explanation:

took thecquiz on edge. got it correct

The formation of a precipitate is a evidence that a chemical reaction has likely occurred.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Now lets check all option one by one

Option (A): a liquid slowly losing volume

Here change in volume occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (B): the formation of a precipitate

Here formation of precipitate is a evidence of a chemical reaction.

So it is correct option.

Option (C): boiling water releasing steam

Here formation of evaporation takes places which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (D): a change in the shape of solid.

Here change in shape occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.

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Step-by-step explanation:

The number of carbon atoms present in the structure is 5

Each carbon atom carry four hydrogen atoms

The above organic structure is Pentane

Having a molecular formula of C5H12

Answer:

east to west is the answer

Answer:

theres no picture

Explanation:

Answer:

I think the answer is 50.546

Balanced chemical reaction: 2KClO₃ → 2KCl + 3O₂.

Potassium is metal from first group of Periodic table of elements, it has always oxidation number in compound +1.

Chlorine in the reactant state has oxidation number +5 (+1 + x + 3 · (-2) = 0) and it is reduced to -1 (+1 + x = 0) in the product state.

Oxygen in the reactant state has oxidation number -2 (+1 + 5 + 3 · x = 0) and it is oxidized to 0 (in molecule of oxygen) in the product state.

Consider this reaction and answer the questions:

             Upper K upper C l upper O subscript 3 right arrow upper K upper C l plus upper O subscript 2.

What is the oxidation number of chlorine in the reactant state?

+5

What is the oxidation number of oxygen in the reactant state?

-2

What is the oxidation number of potassium in the reactant state?  

+1

What is the oxidation number of chlorine in the product state?

What is the oxidation number of oxygen in the product state?

What is the oxidation number of potassium in the product state?

Explanation:

It should be decreasing, and the potential energy increasing, since Law of Conversation of Energy, right?

Also, if you think about what happens when it goes down, it loses potential and gains kinetic, so maybe the opposite should happen when it goes up.

Answer:

it's decreasing

Explanation:

as you know a roller coaster loses speed as it ascends and the kinetic energy is proportional to the speed according to it's formula

KE=(mv^2)/2

where m is the mass and v is the speed

Chromosomes are formed inside the nucleus of a cell. They carry genetic information and are responsible for traits and characteristics passed down from one generation to the next. Chromosomes play a crucial role in cell division, and chromosomal abnormalities can lead to a variety of genetic disorders.

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Answer:

Q1= 9.42

Q2= 227 KJ

Q3= 31.4 KJ

Qt=269 KJ

Explanation:

First you have to find the heat needed to make ice at a temperature of -45 C to pass to a temperature of 0 C.

You're given the formula so all you have to do is replace by the data you're given (remember to make the Celsius, Kelvin by adding 273.15 to the Celsius since the magnitudes of temperature they're giving you in the constants are the Kelvin)

Q1= (2.093 J/gxK)(100 g)(45 K)

Q1=9418.5 J

Q1=9.4185 KJ≈9.42 Kj(you're asked to give your answer in KJ)

You know have to find the energy needed to liquify the ice, in other words you need to use the enthalpy of fusion to determine the energy that's being used, and since you have 100 grams of water, you only need to find the number of moles present in 100 grams of water by dividing the number of grams by the molar mass of water (18 g/mol) and then replace in the equation.

Q2=(5.56 mol)(40.7 KJ/mol)

Q2=227 KJ

You know have to find the energy needed to raise the temperature of water from 0 C to 75 C. You do the same thing as you did in the first step:

Q3=(4.184 J/gxK)(100 g/)(75K)

Q3=31380 J

Q3=31.38 KJ≈31.4 KJ

For the final step, you only add the Qs of each step:

9.42KJ+227KJ+31.4KJ= 267.82 KJ ≈ 267.8 KJ

Why do you use these procedures?

Well, you could simply have made a unique equation at first sight that involved the changes of temperature from -45 C to 75 C, but you have a phase change in the middle. Phase change keep temperature constant but they require heat from the surroundings in order to, in the case of ice, break the bonds that keep the molecules tight together.

This heat required from the surroundings is the Enthalpy of phase change, in this case enthalpy of fusion.

Answer: The pH is 9.09.

Explanation:

This question involves the hydrolysis of a salt into a weak acid and strong base.

The fastest solution is found by using the equation:

\(\text{pH} = \frac12 \ \text{pK}_w + \frac12 \ \text{pK}_a + \frac12 \log C\)

where C represents the concentration of the solution.

We have:

Ka = 1.34 x 10^-5, so pKa = -log(1.34 x 10^-5) = 4.873

Kw = 1.0 x 10^-14, so pKw = -log(1.0 x 10^-14) = 14.00

C = 0.20, so log(C) = log(0.20) = -0.70

Then,

\(\text{pH} = \frac12 (4.873) + \frac12 (14.00) + \frac12 (-0.70) = 9.09\)

A solution that uses only fundamental chemistry techniques can be found by considering the chemical reactions involved.

The salt \(\text{C}_2\text{H}_5\text{COONa}\) will completely dissolve in solution into its ions:

\(\text{C}_2\text{H}_5\text{COONa} \text{ (aq)} \rightarrow \text{C}_2\text{H}_5\text{COO}^- \text{ (aq)} + \text{Na}^+ \text{ (aq)}\)

This shows that \([\text{C}_2\text{H}_5\text{COO}^-] = [\text{C}_2\text{H}_5\text{COONa}] = 0.20 \text{ M}\).

When water is added, an acid-base reaction occurs:

\(\text{C}_2\text{H}_5\text{COO}^- \text{ (aq)} + \text{H}_2\text{O} \text{ (l)} \rightleftharpoons \text{C}_2\text{H}_5\text{COOH} \text{ (aq)} + \text{OH}^- \text{ (aq)}\)

Using a RICE (Reaction-Initial-Change-Equilibrium) table, we can write the following analysis:

0.20                       N/A                0                        0       (initial conc.)
- x                           N/A                + x                      + x    (change)
-------------------------------------------------------------------------
(0.20 - x)                N/A                 x                        x       (equilibrium)

Then, we can write the forward base-reaction constant:

\(\text{K}_b = \frac{[\text{C}_2\text{H}_5\text{COOH}][\text{OH}^-]}{[\text{C}_2\text{H}_5\text{COO}^-]} = \frac{(x)(x)}{0.20-x} = \frac{x^2}{0.20-x}\)

We have \(\text{K}_a = 1.34 \times 10^{-5}\) and we also know that \(\text{K}_w = \text{K}_a \times \text{K}_b\). It follows that:

\(\text{K}_b = \frac{\text{K}_w}{\text{K}_a} = \frac{1.0 \times 10^{-14}}{1.34 \times 10^{-5}} = 7.46 \times 10^{-10}\)

Since Kb is very small, we may assume that \((0.20 - x) \approx 0.20\). Then,

\(7.46 \times 10^{-10} = \frac{x^2}{0.20} \quad \rightarrow \quad x \approx \sqrt{0.20(7.46 \times 10^{-10})} = 1.22 \times 10^{-5}\)

Then,

\([\text{OH}^-] = x = 1.22 \times 10^{-5}\)

\(\text{pOH} = -\log(1.22 \times 10^{-5}) = 4.91\)

Finally,

\(\text{pH} = \text{pK}_w - \text{pH} = 14.00 - 4.91 = 9.09\)

Answer:

Sulfur?

Explanation:

Sulfur has 6 valence electrons and does not have luster.

Definition of Biomimicry - The conscious emulation of life’s genius. Learning from and then emulating biological forms, processes, and ecosystems to create more Option D. sustainable designs

Biomimicry is an interdisciplinary approach that seeks inspiration from nature to solve human challenges and create sustainable solutions. It involves studying and understanding the genius of living organisms, their adaptations, structures, and processes, and then applying those principles to design and innovation.

The ultimate goal of biomimicry is to develop sustainable designs and products that mimic nature's efficiency, resilience, and sustainability. By observing and understanding how biological systems have evolved over millions of years to thrive in their environments, biomimicry aims to extract valuable lessons and apply them to human-made systems.

The potential benefits of biomimicry are vast. By emulating nature's designs and processes, we can create more efficient, resource-saving, and environmentally friendly products and technologies. Biomimicry has the potential to address various challenges, including reducing carbon pollution, conserving resources, improving energy efficiency, and enhancing overall sustainability.

In summary, biomimicry is the conscious emulation of life's genius, drawing inspiration from biological forms, processes, and ecosystems. It aims to create more sustainable designs and products that mimic nature's efficiency and resilience, ultimately fostering a harmonious relationship between human-made systems and the environment. Therefore, Option D is correct.

The question was incomplete. Find the full content below:

Definition of Biomimicry - The conscious emulation of life’s genius. Learning from and then

emulating biological forms, processes, and ecosystems to create more ______________________

Group of answer choices

A. clever products

B. carbon pollution

C. money makers

D. sustainable designs

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