Identify the reaction type shown and describe the clues that were used to identify it.

NH4NO3 → N2O + 2H2O

good luck on ur test i wish i could help u more but im only in 7th grade :/ and i dont know that yet, so sorry again! :(

Explanation:

Answer:

6.55 g

Explanation:

The atomic mass of Carbon (C) is 12.0107, of Hydrogen (H) is 1.008, of Nitrogen(N) is 14.0067, and of Oxygen(O) is 15.9994

Therefore the molar mass of acetaminophen = 12.0107 + 4 * 1.008 + 14.0067 + 2 * 15.9994 = 151.16

mass of C in 99.0 g of acetaminophen = (99.0 g / 151.16 g/mol) * 1 mol C/ 1mol acetaminophen

mass of C in 99.0 g of acetaminophen = 6.545 g

In this question, we have a situation where an ice cube is placed in a glass of hot water, which means we have a situation of exothermic and endothermic reactions occurring.

The endothermic reaction will be related to the ice cube, since this cube will increase its temperature, and in order to do that, the cube needs to absorb energy, and this thermal energy will come from the hot water

The exothermic reaction is the hot water releasing this thermal energy to its surroundings, and then the temperature will decrease as well

The options that are the answers will be:

C

F

Letter B should be the opposite, -qwater = qice, and letter A doesn't show the positive or negative sign

Answer:  The biology or linguistic  term?

Explanation: The introduction of a plant or animal to a region where it is not indigenous.

Answer:

C. Power plant

Explanation:

Answer:

212 000 yrs

Explanation:

15/16 decay means 1/16 is left

 how many halflives is this?

                    (1/2)^n = 1/16

                       n = 4   half lives

4 half lives * 53 000 yr/ half life = 212 000 yrs

Answer:

c. 212,000 years

Explanation:

got it right on edge:3

Answer: Only A

Explanation: The moon controls the tides because of its gravitational pull. The moon's gravitational pull is weaker than Earths that is why the moon's gravitational pull only effectts water on the earth.

Answer: The different quantities of eggs are: grade aa, grade a and grade b. The different quantities of an egg are: hard & soft boiled, hard & soft scrambled, sunny side up and over easy-over hard.

Explanation: hope it helps

Answer:

the molecules strike the walls of the container more often.

Explanation:

The pressure of a gas refers to the force per unit area exerted on the walls of container by gas molecules.

Since the average kinetic energy of gas molecules increases as the temperature of the gas increases, the molecules of the gas tend to strike the walls of the container more often as the temperature of the gas increases.

Hence, the pressure of a gas increases due to an increase in temperature because the gas molecules strike the walls of the container more often.

Answer:

Exothermic

Explanation:

The equation of the reaction is given as;

H₂O(vapour) --> H₂O(liquid)

The equation above represents a condensation process. Water vapour condenses to liquid.

Condensation involves loss of energy as heat. The equation can be modifies as;

H₂O(vapour) --> H₂O(liquid) + Heat

Due to the loss of heat, condensation is regarded mas an exotheric process.

In the given solution, the solute is the sugar. A solute is a substance that is being dissolved in a solvent to form a solution. In this case, the sugar is being dissolved in the water to make a sugar solution. The water, on the other hand, is the solvent, which is a substance that dissolves the solute.

The amount of sugar that is being dissolved in the water is one teaspoon. The teaspoon is not the solute but rather a unit of measurement that is being used to measure the amount of sugar being dissolved in the water. The teaspoon is a common unit of measurement for household cooking and baking, and it is used to measure small amounts of ingredients like sugar, salt, and spices.

It is important to note that the amount of sugar being dissolved in the water can affect the properties of the solution, such as its taste, color, and viscosity. In this case, the one teaspoon of sugar may not significantly change the properties of the water, but a larger amount of sugar may result in a sweeter and thicker solution.

In summary, in a solution made from one teaspoon of sugar and one liter of water, the solute is the sugar, while the teaspoon is simply a unit of measurement for the amount of sugar being dissolved.

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Answer:

observation

Explanation:

Answer: Heyo Kenji Here! Here's your answer- when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation: ~Hope this helps!~

Have a nice day!

- Kenji ^^

Five moles of CH₄ have a different number of atoms (25 moles) than the other three substances (18 moles). Therefore, the correct option is (c)

Let us recall the Avogadro's constant:

6.022 × 10²³

Avogadro's number states that 1 mole of any substance contains 6.022 × 10²³ entities (atoms, molecules, or formula units).

We need this information to calculate the number of atoms for each substance:

For six moles of water

1 mole of water (H₂O) = 2 moles of hydrogen atoms (H) + 1 mole of oxygen atoms (O).

Six moles of water = 6 × (2 + 1) = 18 moles of atoms.

For nine moles of NaCl

1 mole of NaCl = 1 mole of sodium atoms (Na) + 1 mole of chlorine atoms (Cl).

Nine moles of NaCl would = 9 × (1 + 1) = 18 moles of atoms.

For five moles of CH₄

1 mole of CH₄ (methane) = 1 mole of carbon atoms (C) + 4 moles of hydrogen atoms (H).

Five moles of CH₄ = 5 × (1 + 4) = 25 moles of atoms.

For three moles of Na₂SO₃

1 mole of Na₂SO₃ contains 2 moles of sodium atoms (Na), 1 mole of sulfur atoms (S), and 3 moles of oxygen atoms (O). Therefore, three moles of Na₂SO₃ would contain 3 × (2 + 1 + 3) = 18 moles of atoms.

Comparing the results, we can see that five moles of CH₄ have a different number of atoms (25 moles) than the other three substances (18 moles). Therefore, the correct answer is five moles of CH₄.

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The element should be placed in the column for metalloids. Option A

We know that the properties of metals can be used to identify an unknown substances as a metal. We know that metals are able to react with acids to liberate the metal salt and hydrogen gas. Metals do not react with bases because they can not accept electrons.

Metalloids are generally amphoteric in nature. They can react with both the acid and the basses to form compounds. The nonmetals do not react with acid or base.

Looking at the result, we are told that the entry in the second row have the entries  nothing, nothing, nothing. If this is the outcome, then it follows that the element should be placed in the column for metalloids.

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Answer: A

Explanation:

If a 5 kb plasmid has one EcoRI restriction site, and a 5 kb linear piece of DNA has one EcoRI restriction site, and you cut both of them with EcoRI, the result would be the production of linear DNA fragments from both the 5 kb plasmid and the 5 kb linear piece of DNA.

The DNA fragments would be of unequal sizes.

The 5 kb linear piece of DNA would be split into two linear DNA fragments - one that is 5 kb in length and another that is much smaller in size.

The plasmid DNA, on the other hand, would be cut into one linear DNA fragment that is 5 kb in length.

Because the plasmid is circular, cutting it with a restriction enzyme would generate linear fragments.

The different-sized fragments are because EcoRI cuts DNA in a specific manner.

It cleaves the DNA double helix between the G and A nucleotides of the sequence 5'-GAATTC-3' on each strand.

The DNA fragments produced would have sticky ends.

The sticky ends are single-stranded DNA tails that overhang on each end of the DNA fragment produced as a result of the restriction enzyme digest.

Restriction enzymes cleave the phosphodiester bond in the DNA backbone at specific sites called restriction sites.

The restriction sites are palindromic sequences that are read the same way forward and backward.

Thus, the EcoRI restriction site reads 5'-GAATTC-3' on one strand and 3'-CTTAAG-5' on the complementary strand.

In conclusion, cutting both the 5 kb plasmid and the 5 kb linear DNA piece with EcoRI would generate different-sized linear DNA fragments with sticky ends.

The plasmid would generate one linear fragment, while the linear piece of DNA would generate two fragments of unequal sizes.

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Answer:

Hypothesis is a statement of expectation or prediction that will be tested by research

The nuclide ¹²⁷₅⁹Co²⁷ has 27 protons, an atomic number of 27. Its mass number is 59, representing the total number of protons and neutrons. The number of neutrons can be calculated by subtracting the atomic number from the mass number, resulting in 32 neutrons for this nuclide.

Atoms are composed of protons, neutrons, and electrons. The atomic number of an element corresponds to the number of protons in the nucleus of its atom. In the given nuclide ¹²⁷₅⁹Co²⁷, the atomic number is 27, indicating that it has 27 protons.

The mass number represents the sum of protons and neutrons in the nucleus. By subtracting the atomic number from the mass number, we can determine the number of neutrons. In this case, the mass number of the nuclide is 59, which means it contains 59 total protons and neutrons.

To find the number of neutrons, we subtract the atomic number (27) from the mass number (59). The result is 32, indicating that the nuclide ¹²⁷₅⁹Co²⁷ has 32 neutrons.

In summary, the nuclide ¹²⁷₅⁹Co²⁷ has 27 protons, an atomic number of 27, a mass number of 59, and 32 neutrons.

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The order of decreasing δ and energy of light absorbed for the compounds [Cr(en)3]3+, [CrCl6]3-, and [Cr(CN)6]3- is as follows: [Cr(en)3]3+ > [CrCl6]3- > [Cr(CN)6]3-.

In the given order, [Cr(en)3]3+ has the highest value of δ and absorbs light with the highest energy. This can be attributed to the presence of the ethylenediamine ligands (en), which are strong field ligands. The strong field ligands cause a larger splitting of the d-orbitals in the central chromium ion, resulting in a higher energy gap between the ground state and excited states. Therefore, [Cr(en)3]3+ exhibits a higher δ and absorbs light with higher energy.

On the other hand, [Cr(CN)6]3- has the lowest value of δ and absorbs light with the lowest energy. This is because cyanide ligands (CN) are weak field ligands, leading to a smaller splitting of the d-orbitals and a lower energy gap. As a result, [Cr(CN)6]3- has the lowest δ and absorbs light with lower energy compared to the other two compounds.

In between these, [CrCl6]3- falls in the middle with intermediate values of δ and energy of light absorbed. Chloride ligands (Cl) are moderately strong field ligands, causing a moderate splitting of the d-orbitals and an intermediate energy gap.

In summary, the order of the compounds with decreasing δ and energy of light absorbed is [Cr(en)3]3+ > [CrCl6]3- > [Cr(CN)6]3-. This order is determined by the strength of the ligands and the resulting splitting of the d-orbitals, which influences the energy gap and the energy of light absorbed by the compounds.

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Answer:

B

Explanation:

Sure, here is a brief explanation of the difference between atoms, molecules, compounds, and mixtures in chemistry:

Atoms are the smallest unit of an element that can exist. They are made up of protons, neutrons, and electrons.

Molecules are groups of two or more atoms that are chemically bonded together. The atoms in a molecule can be of the same element, like in oxygen (O2), or of different elements, like in water (H2O).

Compounds are substances that are made up of two or more elements that are chemically combined. Compounds have a fixed composition, meaning that they always contain the same elements in the same proportions.

Mixtures are substances that are made up of two or more substances that are not chemically combined. The components of a mixture can be separated by physical means, like filtration or distillation.

Here is a table that summarizes the key differences between atoms, molecules, compounds, and mixtures:

| Property | Atom | Molecule | Compound | Mixture |

|---|---|---|---|---|

| Composition | Single element | Same element or different elements | Two or more elements | Two or more substances |

| Bonding | Not bonded | Chemically bonded | Chemically bonded | Not chemically bonded |

| Separation | Not possible | Not possible | Possible | Possible |

| Properties | Same as element | Same as elements or different | Different from elements | Same or different from components |

I hope this helps! Let me know if you have any other questions.

John Dalton's original atomic theory contained the following key ideas and the incorrect one is that elements are made of tiny indivisible particles called atoms and is denoted as option A.

This is defined as the smallest unit of matter which forms a chemical element and Dalton proposed that it was indivisible which was later proved wrong.

It was later discovered that atom is made up of sub atomic particles such as proton, electron and neutron. This was therefore the reason why option A was chosen as the most appropriate choice.

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The options include:

A. elements are made of tiny indivisible particles called atoms

B. Atoms are unchanged in chemical reaction

C. Atoms can join together in whole number ratios to form compounds.

D. The atoms of each element are unique

Answer:

7.8

Explanation:

pH + pOH = 14

pOH = 14 - 6.2

= 7.8

Amount of oxygen used in the whole reaction is 0.243g and 1.336g amount of oxygen is required for complete combustion .

In natural science, a hydrocarbon is a natural compound comprising completely of hydrogen and carbon.[1]: 620 Hydrocarbons are instances of gathering 14 hydrides. Hydrocarbons are by and large drab and hydrophobic; their scent is normally weak, and might be like that of gas or lighter liquid. They happen in a different scope of sub-atomic designs and stages: they can be gases (like methane and propane), fluids (like hexane and benzene), low liquefying solids, (for example, paraffin wax and naphthalene) or polymers (like polyethylene and polystyrene).

We need to find the moles of each of the product,which is the ratio of amount of solute dived by the molecular weight.

Moles of carbon dioxide=0.733/44=0.0166

Moles of carbon monoxide=0.467/28=0.00166

Moles of water=0.450/18=0.025

1) Utilizing the law of conservation of mass :

m(C\(_x\)H\(_y\)) + m(O₂) = m(CO) + m(CO₂) + m(H₂O)

m(O₂) = m(CO) + m(CO₂) + m(H₂O) - m(C\(_x\)H\(_y\)) = 0.425 + 0.668 + 0.410 - 0.410 = 1.093 (g)

2) If we need to finish ignition, we really want to oxidize CO to CO₂

2CO + O₂ = 2CO₂

madd(O₂) = M(O₂)∙ˣ(O₂) = M(O₂)∙ˣ(CO)/2 = M(O₂)∙ˣm(C)

2M(CO)

= 32∙0.425

2∙28

= 0.243 (g)

mtotal(O₂) = m(O₂) + madd(O₂) = 1.093 +0.243 = 1.336 (g)

Hence,required answers are 0.243g and 1.336g.

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(Complete question) is:

When hydrocarbons are burned in a limited amount of air, both carbon monoxide and carbon dioxide form. When 0. 450 g of a particular hydrocarbon was burned in air, 0. 467 g of carbon monoxide, 0. 733 g of carbon dioxide, and 0. 450 g of water were formed. This particular hydrocarbon consists only of hydrogen and carbon?

1) How many grams of O₂ were used in the reaction?

2) How many grams would have been required for complete combustion?

Answer: 167.2 J

Explanation:

Explanation:

We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.

a) Carbon-14:

By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.

atomic number = n° of protons

mass number = n° of protons + n° of neutrons

n° of protons = atomic number

n° of neutrons = mass number - n° of protons

n° of neutrons = mass number - atomic number

If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.

In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.

n° of protons = atomic number = 6

n° of protons = 6

n° of neutrons = mass number - atomic number = 14 - 6

n° of neutrons = 8

b) Cobalt-60:

atomic number = 27 (from the periodic table)

mass number = 60

n° of protons = atomic number = 27

n° of protons = 27

n° of neutrons = mass number - atomic number = 60 - 27

n° of neutrons = 33

c) Gold-197:

atomic number = 79 (from the periodic table)

mass number = 197

n° of protons = atomic number = 79

n° of protons = 79

n° of neutrons = mass number - atomic number = 197 - 79

n° of neutrons = 118

d) Uranium-235:

atomic number = 92 (from the periodic table)

mass number = 235

n° of protons = atomic number = 92

n° of protons = 92

n° of neutrons = mass number - atomic number = 235 - 92

n° of neutrons = 143

Answer:

a) Carbon-14: n° of protons = 6 n° of neutrons = 8

b) Cobalt-60: n° of protons = 27 n° of neutrons = 33

c) Gold-197: n° of protons = 79 n° of neutrons = 118

d) Uranium-235: n° of protons = 92 n° of neutrons = 143

The 1H NMR signal for an OH or NH proton usually does not exhibit spin-spin splitting because these protons exchange rapidly with other protons in solution.

This exchange leads to broadening of the NMR signal, making it difficult to observe spin-spin splitting. However, if the exchange rate is slowed down, spin-spin splitting may be observed.

                            Additionally, if the OH or NH proton is part of a larger molecule or functional group, the surrounding atoms and chemical environment can affect the NMR signal and potentially lead to spin-spin splitting.
The statement is true. The 1H NMR signal for an OH or NH proton typically does not exhibit spin-spin splitting due to the rapid exchange of these protons with the surrounding solvent, which effectively averages out the spin-spin interactions. This results in a broad, singlet peak for these types of protons in the NMR spectrum.

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