the acid-catalyzed tautomerization mechanism is a two-step process. first, the enol is

Answer:

True.

Explanation:

This is because when the number of protons in the nucleus increases the neutrons needed for a stable nucleus increases even more rapidly.

Best of luck!!!

Answer:

Explanation:

Mark this answer as brainlest answer!!

Answer:

Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.

Explanation:

Answer:

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Explanation:

The results show that 10th graders from smog-filled cities had a significantly higher prevalence of asthma than their counterparts in smog-free rural areas.

Asthma is a chronic respiratory condition characterized by inflammation and narrowing of the airways, which can cause difficulty breathing, coughing, wheezing, and shortness of breath. It affects the bronchial tubes, which are the air passages that carry air in and out of the lungs.

The experiment that the scientist designed involved comparing the prevalence of asthma among 10th graders from three schools in smog-filled cities with that of 10th graders from three schools in smog-free rural areas.

Based on these results, the scientist can reject his initial hypothesis that air pollution does not increase the risk of developing asthma in children.

The data supports the claim made in the non-peer-reviewed magazine article that air pollution can cause children to develop asthma. However, it is important to note that this experiment only shows an association between air pollution and asthma and does not establish a causal relationship. Further research would be needed to establish causality and to investigate the mechanisms by which air pollution may cause asthma.

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The following statement is true: Stock A has a higher beta (1.5) compared to Stock B (0.5).

According to the CAPM, the expected return of a stock is based on its beta, the risk-free rate, and the expected market return. Stock A's beta is higher than Stock B's, which means that it is more volatile and has a higher systematic risk. Therefore, Stock A should have a higher expected return than Stock B. In equilibrium, investors will demand a higher expected return on Stock A to compensate for its higher risk.

As for which stock is a more desirable addition to a portfolio, it depends on the investor's risk tolerance and investment goals. If the investor is seeking higher returns and is willing to take on more risk, then Stock A may be more desirable. However, if the investor is more risk-averse and is looking for a more stable investment, then Stock B may be a better fit. It ultimately comes down to the individual's investment strategy and preferences.

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Answer:

Hydrogen

Explanation:

These are what hydrogen isotopes look like

If you are unsure which layer is which in an extraction procedure, there are a few steps you can take to try and identify them.

One approach is to carefully observe the physical properties of each layer, such as color, viscosity, and density. For example, the aqueous layer is typically clear or pale yellow in color, while the organic layer may be darker and more viscous.
You can also perform a simple test to determine which layer is which. One common method is to add a small amount of water to the mixture and observe which layer the water separates into. Since water is more polar than many organic solution, it will typically dissolve in the aqueous layer and not in the organic layer.
If you are still unsure which layer is which, you may need to consult a reference or an expert in the field to help you identify them. In any case, it is important to take care when working with extraction procedures, as improper identification of layers can result in loss of product or inaccurate analysis.

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Answer:

4.4 × 10^-7

3 × 10^5

Explanation:

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Answer:

Air is made up of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and other gases in meager amounts.

Answer:

True

Explanation:

They are actively non metals due to their electron configuration and number of valence electrons

Answer:

Mass =116.16 g

Explanation:

Given data:

Moles of CF₄ = 1.32 mol

Mass of  CF₄ = ?

Solution:

Molar mass of  CF₄= 88 g/mol

Formula:

Number of moles = mass/ molar mass

Number of moles × molar mass = Mass

Mass = 1.32 mol ×  88 g/mol

Mass =116.16 g

Answer:

Equation of Reaction = AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)

Steps:

1. Find the moles of AgNO3 with formula n= Mass/Mr (molecular mass)

so you will get moles= 10.0/ 169.87 = 0.05886854654

2. Using stoichiometry you know the equation has 1 mole so the moles of AgCl are gonna be the same; therefore, you will use again the same formula.

3.  moles= mass/molecular mass

0.05886854654 = x/ 143.32

You rearrange the formula to find the mass

so mass = moles x molecular mass

mass = 0.05886854654 x 143.32

mass= 8.44 grams

Explanation:

answer:

1 kilogram!

explanation:

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Answer:

when an atom loses electrons, it will then contain more protons. Thus, the charge of the atom become positive.

Answer:

Hunds rule is violated here.

Hunds rule : pairing of electrons takes place only if all the orbitals are filled with single electrons each.

Answer:

200J or 196J

Explanation:

mass = 10kg

gravity = 9.8 or 10 ( the answer might vary if u take either 10 or 9.8 as the gravitational value )

height = 2 meter

p.e= mgh

option 1

10×10×2 = 200 Joules

option 2

10×9.8×2 = 196 Joules

better to take 9.8 as gravitational value

hope it helps

Answer:

read below ( sorry if this doesn't help :/ )

Explanation:

Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. The chemical symbol for Cadmium is Cd.

Answer:

No. of proton: 48

No. of neutron:64

No. of electrons: 48

Answer:

16-x=16-5

=11

Hope it helps!

Mass of sample = 270.4g

To find the mass of a chemical compound, you need to know the chemical formula of the compound, the number of moles and the atomic masses of its constituent elements.

The formula for sodium hydroxide is NaOH, and its molar mass is 23.00 g/mol for Na + 16.00 g/mol for O + 1.01 g/mol for H = 40.01 g/mol.

To calculate the mass of the 6.761-mol sample, we can use the formula:

mass = moles x molar mass

mass = 6.761 mol x 40.01 g/mol

mass = 270.44 g

Therefore, the answer is option B) 270.4 g.

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Answer: Thus 44 g of \(CO_2\) will be produced  if 30 g of \(C_6H_{12}O_6\) were reacted with an excess of oxygen

Explanation:

To calculate the moles :

\(\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}\)    

\(\text{Moles of} C_6H_{12}O_6 =\frac{30g}{180g/mol}=0.17moles\)

The balanced chemical equation is:  

\(C_6H_{12}O_6 +6O_2(g)\rightarrow 6CO_2+6H_2O(g)\)

As \(C_6H_{12}O_6\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess reagent.

According to stoichiometry :

1 mole of \(C_6H_{12}O_6\) produce =  6 moles of \(CO_2\)

Thus 0.17 moles of \(C_6H_{12}O_6\) will produce=\(\frac{6}{1}\times 0.17=1.0mole\)  of \(CO_2\)

 Mass of \(CO_2=moles\times {\text {Molar mass}}=1.0moles\times 44g/mol=44g\)

Thus 44 g of \(CO_2\) will be produced  if 30 g of \(C_6H_{12}O_6\) were reacted with an excess of oxygen.

The standard cell potential for the given electrochemical cell is 2.14 V.

Given electrochemical cells: $$Ni^{2+}(aq) + Mg(s) \right arrow Ni(s) + Mg^{2+}(aq)$$To calculate the standard cell potential of this electrochemical cell, we can use the formula: Standard cell potential ($E_{cell}^{o}$) = Reduction potential of cathode - Reduction potential of anode Reduction potential of cathode: The reduction potential of cathode is given by the reduction potential of Ni2+.

The half-cell reaction for Ni2+ is given below:$$Ni^{2+}(aq) + 2e^{-} \right arrow Ni(s)$$$$E^{o}_{red} = -0.23V$$Note: In reduction potential, the species with higher reduction potential will reduce and it acts as a cathode. Therefore, the Ni2+ ion reduces to Ni to form Ni(s) and acts as a cathode. Reduction potential of anode: The reduction potential of anode is given by the reduction potential of Mg2+.

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Answer: atoms/molecules

Explanation:

The given cell notation "Mn(s)|Mn²⁺(aq)||Cd²⁺(aq)|Cd(s)" represents an electrochemical cell with the following half-cell reactions: At the anode (left side): Mn(s) → Mn²⁺(aq) + 2e⁻, At the cathode (right side): Cd²⁺(aq) + 2e⁻ → Cd(s)

In the overall balanced equation, we can combine these two half-cell reactions:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

The physical state of each reactant and product can be included as follows:

Solid manganese (Mn) is the anode (left side), represented as "Mn(s)".

Aqueous manganese(II) ion (Mn²⁺) is in solution, represented as "Mn²⁺(aq)".

Aqueous cadmium(II) ion (Cd²⁺) is in solution, represented as "Cd²⁺(aq)".

Solid cadmium (Cd) is the cathode (right side), represented as "Cd(s)".

The balanced equation for the given cell notation is:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

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Answer:

Temperature & Humidity

Explanation:

If the body could not adapt to these changes, we wouldn't be able to live all over the planet; from the equator up to the polar caps.