Are there substances in the lab that have bonds that are not strictly ionic, covalent, or metallic? Explain your answers.

Answer:

search on YT Khan academy work done by gravity

Explanation:

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Answer: The answer would be C i think

Explanation:

In this compound, there would be five proton NMR signals,

We know that the acronym NMR means nuclear magnetic resonance. It has to do with the kind of spectrum in which the kind of chemical environment where the proton is found would impact the spectrum that is observed in the compound.

The first thing that we need to look at and find out in the image is to be able to find out the number of chemical environments that we have in the compound as we can see it in the image.

By studying the compound closely, we can see that there are four different proton chemical environments that we can be able to see and map out from the compound and it is these chemical environments that tell us the number of signals to expect.

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Spontaneous reaction is a reaction that occurs without the addition of energy

There are two types of reactions in thermodynamics:

Endothermic reactions -

Exothermic reactions -

Thus we can conclude that spontaneous reaction is a reaction that occurs without the addition of energy

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NADP, nicotinamide adenine dinucleotide phosphate forms NADPH by combining with the H+ ion and two electrons. Thus, option C is correct.

NADP, nicotinamide adenine dinucleotide phosphate is a reducing agent in electron transport chains of metabolic processes in living things. NADPH is the reduced form of NADP.

In biochemical reactions such as glycolysis, photosynthesis etc, NADP plays a significant role as a reducing agent. NADP and NADPH together are called the redox couple and they maintain cellular redox homeostasis.

Hydrogenation of molecules is called reduction and thus the NADP+ reduces to its NADPH by combining with a two electrons and H+. Hence option C is correct.

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Answer:

These forces differ from covalent and ionic chemical bonding because they result from fluctuations in charge density of particles. Examples of van der Waals forces include hydrogen bonding, dispersion forces, and dipole-dipole interactions.

Explanation:

Methane (CH4) is a hydrocarbon that is mostly found in natural gas and has a molecular weight of 4.051747moles per 65.0 grams.

Methane concentrations above a certain threshold can affect how much oxygen is breathed in. This can include headaches, face flushing, memory loss, vision issues, slurred speech, mood swings, nausea, and vomiting. Serious cases could result in altered breathing and heart rate, balance issues, numbness, and coma.

The gas methane (CH4) is colorless, odorless, and very combustible. Carbon and hydrogen are its main ingredients. According to us Environmental Protection Agency, it is also a powerful greenhouse gas, meaning means it influences climate change by causing more warming.

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Answer:

cellular respiration occurs both in plant and animal cells.

Explanation:

Cellular respiration definitely occurs in animals, it is how we break down glucose to get ATP. Plants first use photosynthesis to produce glucose and then need a way to produce ATP, being cellular respiration.

The compound with the chemical formula PbBr₄ is called lead(IV) bromide.

Lead(IV) bromide is an inorganic compound composed of the elements lead (Pb) and bromine (Br). The compound is named based on the oxidation state of lead, which is +4 in this case.

In naming compounds, the Roman numeral in parentheses after the element name indicates the oxidation state of the metal. In the case of lead(IV) bromide, the Roman numeral IV indicates that lead is in the +4 oxidation state. This means that lead has lost four electrons to achieve a stable configuration.

The name "lead(IV) bromide" accurately represents the composition and oxidation state of the compound. It is worth noting that lead(IV) bromide is a relatively unstable compound and is not commonly encountered in practical applications.

Hence, the name of the compound is lead(IV) bromide.

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12500 joule heat is released when an acetylene (C2H2) torch burns 250 grams of fuel

q=ΔnH

H  acetylene = -1300 kJ/mo

n=given mass/molar mass

given mass= 250 g

molar mass=26

n= 250/26

n=9.61

q=ΔnH

q=9.61× -1300 kJ/mo

q=-12500 joule

In thermodynamics, heat has a very specific definition that is different from how we generally use the word. When two systems with various surface temperatures come into touch with one another, heat is the thermal energy that is transferred. The letters q or Q stand for heat, which is measured in joules.

Heat is sometimes referred to as a process quantity since it is defined in the context of a process through which energy can be conveyed. We may talk about the heat that a hot cup of coffee imparts to your hand, but we don't talk about the heat that a cup of coffee itself holds. Heat is yet another noteworthy quality.

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The volume of the solution is obtained as 414 mL.

Often times, we want to  reduce the concentration of a solution and the way that we can be able to do that is by the process of dilution. When we say dilution what it means is that we are going to increase the volume of the solution.

In this case;

C1 = initial concentration

V1 = initial volume'

C2 = final concentration

V2 = final volume

Then;

C1V1 = C2V2

V1 = C2V2/C1

=  7.77 M * 842 mL/ 15.8 M

= 414 mL

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Decantation is widely used to purify a liquid by separating it from an insoluble particle suspension (e.g. in red wine, where the wine is decanted from the potassium bitartrate crystals to avoid unsavory taste).

Decantation is a process of separating solid-liquid mixtures or two or more immiscible liquids. Allowing the mixture to settle into various layers, the lightest/heaviest liquid layers are drained out.

This approach is used in the following ways:

1. Mud-water mixture separation (solid-liquid mixture)

2. Oil and water separation (immiscible liquid mixture)

3. Kerosene and water separation

Decantation is the process of separating liquid from solid and other immiscible (non-mixing) liquids by eliminating the liquid layer on top from the solid or liquid layer underneath.

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Explanation:

Neon is a non-metal. it belongs to group 8 or 18 of the periodic table of elements and is also referred to as a noble gas.

The IUPAC name and molecular formula for the following are,

a) prop-1-yne, C3H4

b) non-4-yne, C9H16

c) hex-3-yne, C6H10

What is IUPAC name?

International Unit for Pure and Applied Chemistry (IUPAC) is the method of naming the organic compounds in chemistry. It creates a standardized naming for the chemical compounds. There are prefixes, suffixes and parent chain considered while naming a compound.

The IUPAC name can be written by counting the parent chain carbons and considering the functional group present which is a triple bond in the given compounds. The molecular formula can be written by counting the number of different atoms present in the compound.

Therefore, the IUPAC name and molecular formula of the given compounds can be written as,

a) prop-1-yne, C3H4

b) non-4-yne, C9H16

c) hex-3-yne, C6H10

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Answer:

Heterotrophs

Explanation:

Heterotrophs are known as consumers because they consume producers or other consumers. Dogs, birds, fish, and humans are examples of heterotrophs. Heterotrophs occupy the second and third levels of the food chain, the chains of organisms that provide energy and nutrients to other organisms.

Answer:

Octane can be written as C8H18.

The balanced equation for combustion of octane is:

2C8H18 + 25 O2 ==> 16CO2 + 18H2O

Finding the limiting reactant:

10.g C8H18 x 1 mol C8H18 / 118 g = 0.0847 moles (÷2->0.042)

61.2 g O2 x 1 mol O2 / 32 g = 1.91 moles (÷25->0.077)

C8H18 is the limiting reactant and will dictate the maximum amount of H2O that can form.

Maximum H2O formed:

0.0847 moles C8H18 x 18 moles H2O / 2 moles C8H18 x 18 g H2O/mol = 14 g H2O formed (2 sig.figs.)

Explanation:

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The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, the mass of CH[tex]_2[/tex]O is 4.80g.

Molarity can be calculated by dividing number of moles of solute by volume of solution in liter. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute÷ Volume of solution in liter

number of moles of solute =given mass÷ Molar mass of solute

number of moles of solute =mass÷30.03 g/mol

Molarity=0.314 M

Volume of solution=0.505 liters

Substituting all the given values, we get

0.314 M= {mass÷30.03 g/mol}÷ 0.505 liters

mass÷30.03 g/mol=0.15

mass =4.80g

Therefore, the mass of CH[tex]_2[/tex]O is 4.80g.

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The molarity of the stock Mn²⁺ ions is 0.0288 M

Based on the dilution formula;

The molarity of a solution is the number of moles of a solute dissolved in a given volume of solution in liters.

The molarity of the stock solution is:

moles of Mn²⁺ ions = mass / molar mass

molar mass of  Mn²⁺ ions = 55.0 g/mol

moles of Mn²⁺ ions = 1.584 / 55

moles of Mn²⁺ ions = 0.0288 moles

molarity of Mn²⁺ ions = 0.0288 / 1

molarity of Mn²⁺ ions = 0.0288 M

The dilution formula is used to determine the molarities of A, B, and C.

C₁V₁ = C₂V₂

C₂ = C₁V₁ / V₂

Where;

Molarity of A = 50 * 0.0288 / 1000

Molarity of A = 0.00144 M

Molarity of B = 10 * 0.00144 / 250

Molarity of B = 0.0000576 M

Molarity of C = 10 * 0.0000576 / 500

Molarity of C = 0.000001152 M

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Since energy can neither be created nor destroyed, it follows that the wavelength that was absorbed by the electron is also emitted.

We know that the Bohr model posses the idea that an electron could move from a lower to higher energy level by the absorption of a photon of light. Thus we know that, when we supply energy to the electron, it is that energy that leads to the electronic transition.

It is clear that the energy that the electron has taken in when it moves up is the same as the energy that it would give out when it comes down in accordance with the law of conservation of energy.

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The molality of 6.2g of LiBr in 52.6g water is 0.0013mol/kg

The molecular weight of LiBr is 86.845 g/mol thus substituting this value in the formula of moles,

Moles of LiBr = grams/molecular weight

Moles of LiBr = 6.20/ 86.845

Moles of LiBr = 0.071 mol

Substituting the value of moles in the formula of molality

Molality= moles/grams of solvent

Molality= 0.071/52.6

Molality= 0.0013 mol/g

Molality, or more specifically, the number of moles of solute contained in a kilogram of solvent, is a unit used to express the concentration of a solution.

The quantity of moles of solute per kilogram of solvent is known as molality, which is denoted by a tiny "m."

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The set of reactions that best represents the diagram of a precipitation reaction is given below:

Li₂SO₄ (aq) + AgNO₃ (aq)  ---->

The net ionic equation is given below:

SO₄²⁺ (aq) + 2 Ag⁺ (aq)  ----> Ag₂SO₄ (s) (a precipitate)

Precipitation reactions are reactions in which two soluble solutions when they are mixed result in the formation of an insoluble precipitate.

Precipitation reactions rea usually double replacement reactions.

Double replacement reactions also known as double displacement reactions are reactions in which an exchange of radicals occurs between two metallic cations resulting in the formation of an insoluble compound that forms the precipitate observed.

Considering the given reactions and the products obtained:

NH₄Br (aq) + Pb(C₂H₃O₂)₂ (aq) ---> forms no precipitate

KNO₃  (aq) + CuCl₂(aq) ---->  forms no precipitate

Li₂SO₄ (aq) + 2 AgNO₃ (aq)  ---->  2 LiNO₃ (aq) + Ag₂SO₄ (s) (forms a precipitate)

NaClO₄ (aq) + CaCl₂ (aq)  ---->  forms no precipitate

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The metals known as Alkaline Earth metals are Na, Mg, or Ca. They are known as "alkaline" earth metals because when they interact with water, they produce "alkaline" hydroxides solutions.

Any of the six chemical elements that make up Group 2 (II a) of the periodic table is an alkaline-earth metal. Beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium are the constituent elements (Ra).

The alkaline earth oxides, formerly known as beryllia, magnesia, lime, strontium, and baryta, are what give the alkaline earth metals their name. These oxides turn basic when combined with water (alkaline).

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The way that scientists predict how much of a product can be formed is through the use of Stoichiometry.

The quantitative examination of the constituents of a chemical process is known as chemical stoichiometry. The Greek words "stoikhein" (which means element) and "metron" (which means measure) are the roots of the English word "stoichiometry."

Stoichiometry describes the correlation between the amounts of reactants and products before to, during, and after chemical processes.

Therefore, the quantity of the generated good is predicted by stoichiometry. To calculate how many S'more "reactants," for instance, we employed stoichiometry.

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The statement " Inertia and distance combine to keep Earth in orbit around the Sun and the Moon in orbit around Earth " is false.

According to Sir Isaac Newton, he proposed and concluded in his investigation that the earth is being kept in its orbit around the Sun and the Moon in orbit around Earth by means of gravity and inertia. This is not done through inertia and distance.

In conclusion, it can be deduced from the explanation given above that inertia and gravity combine to keep the earth in orbit around the Sun and the Moon in orbit around Earth.

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The mass of the magnesium oxide will produce is equal to 9.32 grams

A limiting reagent can be described as the reactant in the chemical reaction which is consumed first during the completion of a chemical reaction.

The limiting reagent decides the yield of the product when the amount of the reactants is not taken in stoichiometry.

Given, chemical reaction of magnesium and iron oxide is:

[tex]3 Mg + 1 Fe_2O_3 \longrightarrow2 Fe + 3 MgO[/tex]

The mass of the magnesium = 5.6 g

The number of moles of Mg = 5.6/24 = 0.233

The mass of the iron oxide = 10 g

The number of moles of  Mg = 10/103.8 = 0.096

The 3 moles of Mg react with iron oxide = 1

Then 0.233 moles of Mg react with iron oxide = 0.233/3 = 0.077

Therefore magnesium is a limiting reagent.

The 0.233 moles of Mg will produce magnesium oxide 0.233 moles.

The mass of the magnesium oxide = 0.233 × 40 = 9.32 g

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We obtain the mass percent of the element T as 96.5%.

We know that the mass percent actually has to do with the mass of the object that we could have in a compound expressed as a percentage. Note that we are told that most of the new elements that were discovered do exist as oxides this implies that they are binary compounds of the element that is involved and oxygen.

Now we have to look at the section of the table that have been given in the question so as to be able to obtain the the mass percent of the element as we have it. We can see as it has been written in the table that the atomic mass of the element T is found to be 362.31.

We would now have;

Molar mass of the compound = 6(362.31) + 5(16)

= 2173.86 + 80

= 2253.86

Mass percent composition of element T =  6(362.31)/2253.86 * 100/1

= 96.5%

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A) The work you do on the pumpkin is 31.36 J as you lift it from the ground.

B) The work is zero as you carry it from the field.

Work can be defined as the energy spent when applying a force to move an object through a certain displacement.

The work by a force to move an object through a displacement (d) can be written as:

W = Fdcosθ

Where θ is angle between force and displacement.

(a) The mass, the displacement of the pumpkin from the ground, and the angle are:

m = 3.2 kg

d = 1.4 m

θ = 0∘

Here, the force exerted during lifting the pumpkin is equal to the weight of the pumpkin:

F = mg = (3.2)(9.8) = 31.36 N

Thus, the work done when lifting the pumpkin is

W = F d cosθ = (31.36 N)(1.4m)cos(0∘) = 44 J

(b) When carrying the pumpkin, the force exerted will be upward while the displacement of the pumpkin will always be directed forward. Therefore, they are perpendicular (i.e. θ = 90∘) to each other which is the reason why the work is zero.

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On average, the total mass of ions in 4.75 liters of Mackenzie River water is 0.466 g grams.

The formula mass of an ionic compound is determined in the same manner as the formula mass of a covalent compound is determined: by adding the average atomic masses of all the atoms in the compound's formula.

Hence, the total mass is computed as follows:

(0.820 mM Ca 2⁺) X ( 2.25 L) = 1.845 mmoles at 40.0 g/mol = 73.8 mg

(0.430 mM Mg 2⁺) X ( 2.25 L) = 0.9675 mmoles at 24.3 g/mol = 23.51 mg

(0.300 mM Na⁺) X ( 2.25 L) = 0.675 mmol at 23.0 g/mol = 15.52 mg

(0.0200 mM K⁺) X ( 2.25 L) = 0.045 mmol at 39.1 = 1.75 mg

(0.250 mM Cl-) X ( 2.25 L) = 0.5625 mmol at 35.45 g/mol = 19.94 mg

(0.380 mM SO₄²-) X ( 2.25 L) = 0.855 mmol at 96.06 g/mol = 82.13 mg

(1.82 mM HCO₃ -) X ( 2.25 L) = 4.095 mmol at 61.02 g/mol = 249.87 mg

Thus, total mass = 73.8 + 23.51 + 15.52  + 1.75 + 19.94 + 82.13 + 249.87

= 466.52mg

Converted into grams  we have:
466.52/1000

= 0.46652

Hence, on average, the total mass of these ions 4.75 L [tex]\approx[/tex] 0.47 grams.

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Answer:

Cu(NO3)2 (aq) + K2CO3 (aq) => CuCO3 (s) + 2KNO3 (aq)

Explanation:

I interpret your question is how to balance the above reaction, right?

Cu(NO3)2 (aq) + K2CO3 (aq) => CuCO3 (s) + 2KNO3 (aq)

Cu: 2

NO3: 2

K: 2

CO3: 2