you have 100 grams of rubidium bromide (rbbr). how many moles do you have? responses 0.61 mol 0.61 mol 1.00 mol 1.00 mol 1.22 mol 1.22 mol 2.00 mol

The molecular formula consistent with the given mass spectrum data is C₆H₆.

What is a mass spectrum data?

A mass spectrum is a plot that shows the distribution of ions based on their mass-to-charge ratio (m/z) in a sample. Mass spectrometry is a technique used to determine the molecular weight and structural information of compounds by ionizing them and separating the resulting ions based on their mass-to-charge ratios.

To determine the molecular formula consistent with the given mass spectrum data, we need to consider the m/z values and their relative heights.

Let's analyze the options:

1.C₆H₆: The molecular weight of C₆H₆ is 78 g/mol, and the M^+ peak is observed at m/z = 78. This is consistent with the data since the mass spectrum shows the M^+ peak at m/z = 78. However, we need to check if the (M+1)^+ peak is also consistent.

The (M+1)^+ peak should correspond to the presence of one additional hydrogen atom (due to the natural abundance of carbon-13 isotopes). In this case, the (M+1)^+ peak would be expected at m/z = 79. With a relative height of 0.78%, it is consistent with the data.

2.C₃H₇Cl: The molecular weight of C₃H₇Cl is 78 g/mol, matching the M^+ peak at m/z = 78. However, the (M+1)^+ peak would correspond to the presence of a chlorine-37 isotope, resulting in m/z = 79.5. Since the (M+1)^+ peak is observed at m/z = 79, this option is not consistent with the data.

3.C₃O₂H₁₀: The molecular weight of C₃O₂H₁₀ is 106 g/mol, which does not match the M^+ peak observed at m/z = 78. Therefore, this option is not consistent with the data.

4.CO₄H₂: The molecular weight of CO₄H₂ is 106 g/mol, which also does not match the M^+ peak observed at m/z = 78. Thus, this option is not consistent with the data.

Based on the analysis above, the molecular formula consistent with the given mass spectrum data is C₆H₆.

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Air is mixture.

But pure air compound .

Explanation:

So the answer is Compound.

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Solution used to white wash the walls is Quick lime(CaO) and when it is mixed with slaked lime [Ca(OH)2]. When this paste is used for white washing it combines with atmospheric CO2 to form calcium carbonate (CaCO3) which gives it a shiny texture.

Answer:

Chemicals can enter and irritate the nose, air passages and lungs. They can become deposited in the airways or be absorbed by the lungs into the bloodstream. The blood can then carry these substances to the rest of the body. Ingestion (swallowing) of food, drink or other substances is another route of exposure.

Explanation:

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Answer: The mass of lead (II) nitrate required is 74.52 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\) ......(1)

Given mass of lead (II) chloride = 62.6 g

Molar mass of lead (II) chloride = 278.1 g/mol

Plugging values in equation 1:

\(\text{Moles of lead (II) chloride}=\frac{62.6g}{278.1g/mol}=0.225 mol\)

The chemical equation for the reaction of lead (II) chloride and sodium nitrate follows:

\(Pb(NO_3)_2+2NaCl\rightarrow PbCl_2+2NaNO_3\)

By the stoichiometry of the reaction:

1 mole of lead (II) chloride is produced from 1 mole of lead (II) nitrate

Then, 0.225 moles of lead (II) chloride will react with = \(\frac{1}{1}\times 0.225=0.225mol\) of lead(II) nitrate

Molar mass of lead (II) nitrate = 331.2 g/mol

Plugging values in equation 1:

\(\text{Mass of lead (II) nitrate}=(0.225mol\times 331.2g/mol)=74.52g\)

Hence, the mass of lead (II) nitrate required is 74.52 g

When GABA binds to enough ligand-gated ionotropic channels, it increases the permeability of chloride ions, making chloride the ion with the dominant permeability and contributing to the inhibitory effects of GABA in the nervous system.

When GABA (gamma-aminobutyric acid) binds to enough ligand-gated ionotropic channels, Cl- (chloride) becomes the ion with the dominant permeability. GABA is an inhibitory neurotransmitter in the central nervous system and when it binds to its specific receptors, called GABA-A receptors, it opens chloride ion channels. This allows the influx of chloride ions into the neuron, leading to hyperpolarization and inhibiting the firing of action potentials.

In normal conditions, the resting membrane potential of the neuron is determined by the balance between the inward and outward flow of ions. The permeability of ions, such as chloride and potassium, plays a crucial role in this balance.

When GABA binds to enough ligand-gated ionotropic channels, it causes an increased permeability of chloride ions. This results in a larger influx of chloride ions, shifting the membrane potential closer to the chloride equilibrium potential. As a result, the neuron becomes more resistant to depolarization, making it harder for action potentials to be generated.

In summary, when GABA binds to enough ligand-gated ionotropic channels, it increases the permeability of chloride ions, making chloride the ion with the dominant permeability and contributing to the inhibitory effects of GABA in the nervous system.

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Azoisobutyronitrile(AIBN) is a radical indicator.

(The structure is shown in the image below.)

A highly popular method for creating polymers is radical polymerization. There are several fairly dependable techniques for conducting radical polymerization, which produces high molecular weight polymers. A common instance is the production of polystyrene when the radical initiator azoisobutyronitrile is present (AIBN).

The compound decomposes when AIBN is employed as an initiator in part due to the strong N-N triple bond and in part due to the very stable radical that is produced. This radical is delocalized and tertiary. Radical polymerizations may also make use of additional initiators.

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Answer:

One arrow is positioned in each box according to Hund's Rule which tells us to maximise the number of unpaired electrons in orbitals of the same subshell, and, to give those electrons the same "spin" (parallel spin).

Explanation:

Answer:

D.

The concentration of reactants and the concentration of products are constant.

Explanation:

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As heat and pressure act upon petroleum over millions of years, it undergoes a process called thermal decomposition or maturation, leading to the formation of hydrocarbon compounds with higher molecular weights. This process ultimately results in the formation of hydrocarbon mixtures known as crude oil and natural gas.

Under high temperatures and pressures, the long-chain hydrocarbon molecules present in petroleum undergo various chemical reactions, including cracking, polymerization, and condensation. These reactions break down the complex hydrocarbon structures and rearrange the carbon and hydrogen atoms to form simpler hydrocarbon compounds.

The exact composition and properties of the resulting hydrocarbon mixtures can vary depending on the specific conditions and source of petroleum. Crude oil typically contains a range of hydrocarbons, including lighter fractions such as gasoline and diesel fuel, as well as heavier fractions such as lubricating oils and bitumen.

If the conditions are more favorable for the formation of lighter hydrocarbons, such as in high-temperature and high-pressure environments, natural gas can be produced. Natural gas is primarily composed of methane (CH4) along with smaller amounts of other hydrocarbons like ethane, propane, and butane.

It's important to note that the transformation of petroleum into crude oil and natural gas occurs over geological timescales and involves complex geological processes. These processes typically take place deep underground in sedimentary basins where petroleum source rocks, such as shale or sandstone, are subjected to heat and pressure.

Overall, the application of heat and pressure on petroleum leads to the conversion of complex organic compounds into simpler hydrocarbons, resulting in the formation of crude oil and natural gas.

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Answer: 360g potassium chlorate

40g KCIO3 - 400g H2O = 360g KCIO3

The half-life of carbon-11 is 20 minutes, so after one hour from when the original sample was measured, the amount of carbon-11 left in the sample would be: 6.25 mCi (millicuries).

This can be determined by calculating the decay rate, the amount of carbon-11 present in the sample after 1 hour is equal to the original amount multiplied by (1/2) to the power of the number of half-lives that have elapsed.

In this case, the number of half-lives that have elapsed is 3 (since the half-life of carbon-11 is 20 minutes and 20 minutes x 3 is 1 hour). Therefore, the equation would look like this: 25 mCi x (1/2)^3 = 6.25 mCi. In other words, after 1 hour has passed, there would be 6.25 mCi of carbon-11 left in the sample.

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No, noninvasive can not be used to study the responses of single neuron.

It is not possible to study the responses of a single neuron non-invasively using current technology. The information related to the activity of a single neuron can be studied using invasive methods such as microelectrode recordings from a single neuron. It is crucial to be cautious while performing such methods as it might damage the brain tissue.

Some non-invasive techniques like fMRI, EEG, and MEG can only record neural activity from many neurons together. EEG, fMRI, and MEG provide information on the activity of groups of neurons, but they cannot provide information on single neuron activity. Hence, invasive techniques are preferred as they can provide detailed information about the activity of individual neurons.

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Answer:

product

Explanation:

Answer:

products

Explanation:

The mass of HONH2 required to dissolve in enough water to make 250.0 mL of solution having a pH of 10.00 is 3.20 x 10^-13 g.

The first step in solving this problem is to recognize that HONH2 can act as a weak base in water. To find the mass of HONH2 required to make a 250.0 mL solution of pH 10.00, we need to use the equation for the ionization of a weak base:

HONH2 + H2O ⇌ H3O+ + ONH2-

The equilibrium constant expression for this reaction is:

Kb = [H3O+][ONH2-] / [HONH2]

We can find Kb from the given pH:

pOH = 14.00 - pH = 4.00

pKb = 14.00 - pOH = 10.00

Kb = 1.00 x 10^-10

We also know that the concentration of ONH2- is equal to the concentration of H3O+ in this solution:

[ONH2-] = [H3O+] = 1.00 x 10^-4 M

Substituting these values into the Kb expression and solving for [HONH2], we get:

[HONH2] = Kb / [ONH2-] = 1.00 x 10^-10 / 1.00 x 10^-4 = 1.00 x 10^-14 M

Now we can use the definition of molarity to find the number of moles of HONH2 required:

Molarity = moles of solute / liters of solution

moles of HONH2 = Molarity x liters of solution = 1.00 x 10^-14 mol

Finally, we can use the molar mass of HONH2 to convert moles to grams:

mass of HONH2 = moles of HONH2 x molar mass of HONH2

molar mass of HONH2 = 32.04 g/mol

mass of HONH2 = 1.00 x 10^-14 mol x 32.04 g/mol = 3.20 x 10^-13 g

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Explanation:

B. Recycles slowly

And it also depends on the organism

The statement "The fatty acid portion of fat can readily be used to synthesize glucose, but glucose cannot be used to synthesize fat" is true.

The fatty acid portion of fat can be converted into glucose via a metabolic process called gluconeogenesis. This process involves the conversion of certain amino acids and the glycerol portion of fat into glucose when glucose levels in the blood are low.On the other hand, glucose cannot be used to synthesize fat. When glucose is consumed in excess, it is converted into glycogen, which is stored in the liver and muscle tissue. If glycogen stores are full, the excess glucose is then converted into fat and stored in adipose tissue. In summary, the body has the ability to convert the fatty acid portion of fat into glucose when needed, but cannot convert glucose into fat.

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Answer:

Explanation:

the tendency for items have 2 electrons in their outermost shell by interacting with others items through electron sharing or transfer is known as duplet rule. if an atom has 2 electrons in it's outermost shell then it is called duplet rule and if a 8 electrons in it's outermost shell than it is called octet rule .

Answer:

The kinetic energy is transferred from the ball to the bumper. The bumper gives the same energy back and the ball eventually stopped due to friction of the ground.

Explanation:

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When the ball hits/bounces off  the bumper kinetic energy is transferred between the bumper and the ball, while the slowing down is caused by surface friction ( applied force )

In the scenerio explained in the question there is an applied force between the surface and the pool ball, and an energy transfer occurring between the pool ball and the bumper.

hence the applied force that cause the ball to come to a halt is friction while the energy transferred is Kinetic energy ( between the ball and bumper )

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The effect or process responsible for the higher temperatures that occur in urban areas is the Heat island effect. The correct option is 1.

Urbanized areas known as heat islands have greater temperatures than nearby rural areas. More than natural landscapes like trees and water bodies, structures like roads, buildings, and other infrastructure reflect and absorb solar heat.

The heat island effect is the reason for high temperatures that happen in urban areas.

Thus, the correct option is 1. Heat island effect.

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The question is incomplete. Your most probably complete question is given below:

Nutritionists express energy in calories, which are 1000 real calories. One real calorie is equivalent to 4.18 joules, the universal energy unit and hence, one nutrition calorie is equivalent to: 4.18 kilojoules.

In the nutrition world, calorie indicate amount of energy in foods. As a food calorie is equal to 1,000 small calories, it is also called a large calorie or a kilocalorie (kcal). Food calories come from these four sources: carbohydrates, proteins, fats, and alcohol.

The calorie and nutrient content of single ingredients and individual foods  is found in the USDA's National Nutrient Database. Most of the packaged foods list information in the Nutrition Facts panel.

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Answer:

energy stored is potential.

Explanation:

Answer:

The answer is

Explanation:

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

\(volume = \frac{mass}{density} \)

From the question

mass of object = 30.5 g

Density = 2.6 g/cm³

The volume is

\(volume = \frac{30.5}{2.6} \\ = 11.7307692...\)

We have the final answer as

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Yes, a precipitate is likely to form for the given aqueous solution because Q is greater than Ksp. The precipitate of PbSO₄ is likely to form in this solution.

The expression Q refers to the ion product, which is calculated by multiplying the concentrations of the ions involved in the equilibrium reaction. In this case, Q = [Pb²⁺][SO₄²⁻] = (0.0120 M)(1.52 x 10⁻⁵M) = 1.82 x 10⁻⁷. Since Q is greater than Ksp (1.82 x 10⁻⁷ > 1.82 x 10⁻⁸), the system is not at equilibrium and more solid PbSO₄ will continue to form until Q = Ksp.

Comparing Q with the solubility product constant (Ksp) of PbSO₄, which is 1.82 x 10⁻⁸, we find that Q is greater than Ksp (1.82 x 10⁻⁷ > 1.82 x 10⁻⁸). This indicates that the system is not at equilibrium and the solution is supersaturated with respect to PbSO₄.

As a result, more solid PbSO₄ will continue to form until the ion product (Q) equals the solubility product constant (Ksp). This leads to the formation of a precipitate of PbSO₄ in the solution. Therefore, based on the comparison of Q and Ksp, it is likely that a precipitate of PbSO₄ will form in the given aqueous solution.

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Answer:

3,or 4 i think please be right

Answer:

I pretty sure it's dichormate based off my research

Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

From the question

mass of metal = 34 g

volume of metal = final volume of water - initial volume of water

volume = 25.3 - 22.3 = 3.0 mL

The density is

\(density = \frac{34}{3} \\ = 11.33333...\)

We have the final answer as

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