Which phrase describes a plateau?

low elevation
surface cut by streams
rounded or sharp peaks
gradual slopes on all sides
It’s not rounded or sharp peaks pls help

Explanation:

Both have the same temperature, but the large bowl of soup has more thermal energy than the small mug because there is more matter present in the bowl.

The temperature of both the bowl is same , but the thermal energy of large bowl is more than the thermal energy of small bowl.

Thermal energy is defined as the energy of an object or system due to the movement of its molecules and atoms. It is produced with rise in temperature.  

It is also defined as internal energy present in a system in the state of thermodynamic equilibrium by virtue of its temperature.

Thermal energy is also known as heat energy.

Thermal energy is directly proportional to mass of the object.
Thermal energy sources include natural gas, coal, and oil, as well as solar, heat pump electric, and geothermal heat.

Thus, the temperature of both the bowl is same , but the thermal energy of large bowl is more than the thermal energy of small bowl.

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The resulting pH after adding the HNO\(_{3}\) solution is around the same as the pKa of HF, which is 3.17. Option D is the answer.

To determine the resulting pH after adding 15 mL of a 0.1 M HNO\(_{3}\) solution to 200.0 mL of a buffer made of 0.25 M HF and 0.25 M NaF, we need to consider the buffer's capacity to resist changes in pH.

The buffer consists of a weak acid (HF) and its conjugate base (F-). When an acid (HNO\(_{3}\)) is added, it reacts with the base (F-) in the buffer to form the conjugate acid (HF) and the nitrate ion (NO\(_{3}\)-).

Since the initial concentrations of HF and F- are equal (0.25 M), the buffer is at its optimal pH, which is approximately equal to the pKa of HF (3.17).

Adding the HNO\(_{3}\) solution increases the concentration of the conjugate acid (HF) and decreases the concentration of the base (F-). However, since the concentrations of HF and F- are still equal, the pH remains close to the pKa.

Therefore, the resulting pH after adding the HNO\(_{3}\) solution is approximately equal to the pKa of HF, which is 3.17.

Option D, 3.17, is the answer.

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Answer:

One mole of carbon atoms has a mass of exactly 12 g. Because magnesium atoms each have twice the mass of carbon atoms ( 24Mg compared with 12C), one mole of magnesium has a mass of 24 g. In fact, one mole of any element has a mass in grams that is equal to its relative atomic mass. One mole of iron has a mass of 56 g.

Explanation:

IRON

I don't know

I don't know

I don't know

I don't know

Explanation:

5 trial, had an average destiny of 7.40. g/cm

The property or aspect of carbon that makes it so important to life on earth is that it can form four (4) covalent bonds.

Carbon is the fourth most abundant element in the universe and is the building block of all known life forms. Carbon's ability to form four covalent bonds is the characteristic that distinguishes it from other elements and makes it the basic building block of life on Earth.

Because of carbon's unique properties, it is found in all organic molecules, including proteins, carbohydrates, and lipids, which are the building blocks of life. Carbon is also found in nucleic acids, the molecules that encode genetic information, and is essential to the functioning of cells and organisms.

Thus, the ability of carbon to form four covalent bonds makes it crucial to the formation of complex molecules that are essential to life.
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Answer:

first question: 16.5 sleps

second question: 1.50 moles

Explanation:

Answer:

23 43 45 43

Explanation:

Answer:

lol where is your questions??

Chromatography is a widely used analytical technique that separates and identifies the various components of a mixture. The two essential components of any chromatography experiment are the stationary phase and the mobile phase.

The stationary phase refers to the material that is fixed in place and does not move during the experiment. This phase is often a solid or a liquid that is coated onto a solid support such as a column or a plate. The mobile phase, on the other hand, is the liquid or gas that moves through the stationary phase and carries the sample to be analyzed. The mobile phase is usually a solvent that has a different polarity than the stationary phase, allowing the components of the mixture to be separated based on their affinity to the stationary phase. In summary, the two essential components of any chromatography experiment are the stationary phase and the mobile phase, and these components play a crucial role in separating the various components of a mixture and identifying them.

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A structural isomer is a compound that has the same number of atoms but is arranged differently. Therefore, to know which will be the structural isomer of the compound they give us, we must count the atoms of each compound.

When comparing the compounds we see that pent-2-yne has C5H8 just like 3-methylcyclobutene, therefore these two compounds are structural isomers.

The answer will be: 3-methylcyclobutene

The example that shows the correct way to set up the calculation will be the second example.

Mathematically:

  Number of moles = mass/molar mass

In this case, mass = 23.4 g and molar mass = 110.98 g/mol

Number of moles = 23.4/110.98 = 0.21 moles

Thus, the second example is the correct way.

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The pH of the solution is 6.11.

The first step is to write out the chemical equations for the ionization of the diprotic acid, H2A. The equations are:

\(H_2A \rightleftharpoons H^+ + HA^- \ \ \ \ (K_{a1})$$HA^- \rightleftharpoons H^+ + A^{2-} \ \ \ \ (K_{a2})$\)

The equilibrium constant for the second ionization, Ka2, is given as 5.37 × 10⁻⁷. We can use the equation for Ka2 to calculate the concentration of H+ in the solution:

\(K_{a2} = \frac{[H^+][A^{2-}]}{[HA^-]}$$[H^+] = \frac{K_{a2}[HA^-]}{[A^{2-}]}$[H^+] = \frac{5.37 \times 10^{-7}(0.0226)}{0.0158}$$[H^+] = 7.7 \times 10^{-7} \ M$\)

Now, we can use the equation for the pH of a solution to calculate the pH of the solution:

pH = -log[H+]

pH = -log(7.7 × 10⁻⁷)

pH = 6.11

Therefore, the pH of the solution is 6.11.

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Answer:

21.16 g

Explanation:

Balance the equation

3 Zn + 2 MoO3 = Mo2O3 + 3 ZnO

And prepare their molar masses

Zn - 65.38

MoO3 - 143.96

Mo2O3 - 239.92

ZnO - 81.38

Since Zn is the limiting reagent; (you can determine this by trial and error but I'm too lazy), basically 29.2 g of MoO3 needs 19.892 g of Zn to react; while 17 g of Zn would need 24.955 g of MoO3 so we have shiet leftover. So we should always use the limiting reagent, in this case,

Zn

as it gets used up completely.

Anyway:
We can now solve using the ratio between Zn and ZnO.
(17 g of Zn /

65.38 g per Zn) x (3 mol of ZnO / 3 mol of Zn) x (81.38 g per ZnO / 1 mol of ZnO) = 21.16 g of ZnO

sooooo you get

21.16 g

(typing this on mobile and kinda hungover so yea)

The element that we can be able to use for the experiment in place of potassium is sodium.

We know that the elements that can be found in the same group does react in the same way. Now we know that we have to look about among the options so that we would be able to know element that is in the same group as potassium.

Given that both sodium and potassium are members of group 1, we have to look out for the element that element thus we have to select sodium.

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Answer:

d is the right answer

please mark me brainlist

Answer:

Two moles.

Explanation:

Sulphuric (sulfuric) acid \(\rm H_2SO_4\) is a diprotic acid. When one mole of \(\rm H_2SO_4\) molecules dissolve in water, two moles of \(\rm H^{+}\) ions would be produced.

\(\rm H_2SO_4 \to 2\, H^{+} + {SO_4}^{2-}\).

On the other hand, sodium hydroxide \(\rm NaOH\) is a monoprotic base. When one mole of \(\rm NaOH\) formula units dissolve in water, only one mole of hydroxide ions \(\rm OH^{-}\) would be produced.

\(\rm NaOH \to Na^{+} + OH^{-}\).

Note that \(\rm H^{+}\) and \(\rm OH^{-}\) react at a one-to-one ratio:

\(\rm H^{+} + OH^{-} \to H_2O\).

As a result, it would take \(2\; \rm mol\) of \(\rm OH^{-}\) to react with the \(\rm 2\; mol\) of \(\rm H^{+}\) that was released when \(1\; \rm mol\) of \(\rm H_2SO_4\) is dissolved in water. Since one mole of \(\rm NaOH\) formula units could produce only one mole of \(\rm OH^{-}\), it would take \(\rm 2\; mol\) of \(\rm NaOH\) formula units to produce that \(2\; \rm mol\) of \(\rm OH^{-}\) for reacting with \(1\; \rm mol\) of \(\rm H_2SO_4\).

The atomic theory describes Dalton's theory because electron, proton and neutron.

The first a part of his theory states that every one matter is product of atoms, which might be indivisible. The second one part of the concept says all atoms of a given element are equal in mass and houses. The  element says compounds are combos of two or extra distinctive forms of atoms.

One of the maximum essential merits of Dalton's atomic idea is the truth that the idea does no longer violate numerous fundamental laws of chemical combination consisting of the regulation of precise proportions, the regulation of multiple proportions, and the regulation of conservation of mass.

In 1803 Dalton located that oxygen mixed with both one or  volumes of nitric oxide in closed vessels over water and this pioneering remark of fundamental more than one proportions supplied vital experimental proof for his incipient atomic thoughts.

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setup 1 : to the right

setup 2 : equilibrium

setup 3 : to the left

The reaction quotient (Q) : determine a reaction has reached equilibrium

For reaction :

aA+bB⇔cC+dD

\(\tt Q=\dfrac{C]^c[D]^d}{[A]^a[B]^b}\)

Comparing Q with K( the equilibrium constant) :

K is the product of ions in an equilibrium saturated state  

Q is the product of the ion ions from the reacting substance  

Q <K = solution has not occurred precipitation, the ratio of the products to reactants is less than the ratio at equilibrium. The reaction moved to the right (products)

Q = Ksp = saturated solution, exactly the precipitate will occur, the system at equilibrium

Q> K = sediment solution, the ratio of the products to reactants is greater than the ratio at equilibrium. The reaction moved to the left (reactants)

Keq = 6.16 x 10⁻³

Q for reaction N₂O₄(0) ⇒ 2NO₂(g)

\(\tt Q=\dfrac{[NO_2]^2}{[N_2O_4]}\)

Setup 1 :

\(\tt Q=\dfrac{0.0064^2}{0.098}=0.000418=4.18\times 10^{-4}\)

Q<K⇒The reaction moved to the right (products)

Setup 2 :

\(\tt Q=\dfrac{0.0304^2}{0.15}=0.00616=6.16\times 10^{-3}\)

Q=K⇒the system at equilibrium

Setup 3 :

\(\tt Q=\dfrac{0.230^2}{0.420}=0.126\)

Q>K⇒The reaction moved to the left (reactants)

Answer:

The system will shift toward the products

The system is at equilibrium

The system will shift toward the reactants

Explanation:

This is correct on edg... Good Luck!!!!

Using this formula, we can calculate the confidence interval once we have the sample data, without the sample data, it is not possible to provide an accurate confidence interval estimate.

To construct a 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system, we would need the sample data, specifically the number of cell phone users and the number of users who developed cancer. Without the sample data, it is not possible to provide an accurate confidence interval estimate.

However, if we assume that we have the necessary sample data, we can proceed with the calculation. The formula for calculating a confidence interval for a proportion is:

Confidence interval

\(=�^±�×�^(1−�^)�Confidence interval= p^​ ±z× np^​ (1− p^​ )​ ​ where:�^p^​\)

 is the sample proportion (number of users with cancer divided by the total number of cell phone users).

\(�\)

z is the z-score corresponding to the desired confidence level (90% confidence level corresponds to a z-score of approximately 1.645).

\(�\)

n is the sample size (total number of cell phone users).

Using this formula, we can calculate the confidence interval once we have the sample data.

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Answer:

4

Explanation: it's a carbon atom right....soo it'll form 4 bonds(single)

An atom can form 4 single covalent bonds is carbon with two electron shell.

The bonds are defined as a strong bond that binds atoms, ions, or molecules together and promotes the production of molecules.

There are three types of bonds.

Covalent bonds are defined as the bond formed by sharing of electrons with each other.

Covalent bonding is a stable equilibrium of the attractive and repulsive forces between two atoms that occurs when they share electrons. Bonding pairs or sharing pairs are other names for these electron pairs.

It can also be defined as a type of chemical link where atoms share electrons to create electron pairs.

Covalent bonds  has low melting point, boiling point, enthalpy of fusion and enthalpy of vaporization.

Thus, an atom can form 4 single covalent bonds is carbon with two electron shell.

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Answer:

1.25 mL/s

Explanation:

Your are told that 25.0 mL of H2 was produced 20 seconds. This is equal to rate 25/20 = 1.25 mL/s

When a reaction progresses, the reactant concentration gradually decreases and the product concentration gradually increases. Here the rate of the reaction is 1.25 mL/s.

The rate of a chemical reaction is defined as the rate of decrease of concentration of a reactant or the rate of increase of concentration of a product. The rate of the reaction is usually expressed in units mol L⁻¹s⁻¹. The rate of the reaction are affected by several factors like concentration of the reactants, temperature, etc.

An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentration of the reactants which determine the rate of the reaction is called rate equation.

Here it is seen that 25.0 mL of H2 was produced 20 seconds. So the rate is given as:

Rate = 25/20 = 1.25 mL/s

Thus the rate of the reaction is 1.25 mL/s.

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Answer:

0.7943448326634696 moles.

The reaction is endothermic with a heat of reaction is 2613 kJ/mol

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature of the immediate surroundings.

We have that;

O=O = 5(495) = 2475

O - C - O = 4(358) = 1432

C- H = 2(413) = 826

O-H = 2(467) = 934

Then we have that;

Reactant side = ( 826 + 1678) + 2475 = 4979

Products side = 1432 + 934 = 2366 kJ/mol

Heat of reaction ion = Recants - Products

= 4979 - 2366

= 2613 kJ/mol

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Answer:

Neon

(if you want a thorough explanaion, just ask for one)

It is C! <3

The reason it's C because pt3 is Sugar science name get it?

Answer:

D. The pressure of the gas decreases!

Explanation:

According to Boyle's Law, there is an inverse relationship between the volume of a gas and its pressure!

So, if the volume of a gas increases, its pressure will decrease; the same thing will happen if the pressure of the gas increases -- the volume will decrease!

↑P↓V and ↓P↑V    <---- this is what it would look like visually!!

Hope this helps! :)

When the volume of a gas increases then the pressure of the gas decreases.

Ideal gas equation is a hypothesis which tells about the behavior of gas in different conditions and it will be represented as:
PV = nRT

From this equation it is clear that pressure and volume are inversely proportional to each other:
P ∝ 1/V

Means if pressure increases ten volume decreases or if pressure decreases then volume increases.

Hence option (4) is correct.

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Answer:

Nitrogen is the main component because it comprises 78% of total air while oxygen comprises 21%

\(.\)

Answer:nitrogen

Explanation:

None of the above mechanisms are consistent with the given rate law.

The given reaction is 2 N₂O₅ (g) → 4NO₂ (g) + O₂ (g), and the experimentally-determined rate law is rate = k[N₂O₅]².

To determine the mechanisms that are consistent with the given rate law, we need to propose a plausible mechanism and check if the derived rate law matches the experimentally-determined rate law.

Possible mechanisms for the reaction can involve various steps such as collision, dissociation, and recombination of molecules. However, without specific information about the reaction mechanism, it is not possible to determine the exact steps involved.

However, we can analyze the stoichiometry of the reaction to gain some insights. The balanced equation shows that 1 mole of N₂O₅ produces 2 moles of NO₂. Therefore, the rate law should include the square term for [N₂O₅] to account for the stoichiometry.

If we consider any of the proposed mechanisms, none of them would lead to a rate law with a square term for [N₂O₅]. Hence, none of the above mechanisms are consistent with the given rate law.

In conclusion, without further information or a proposed mechanism, we can determine that none of the above mechanisms are consistent with the experimentally-determined rate law, which includes the squared concentration term for [N₂O₅].

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Complete Question:

the reaction and experimentally-determined rate law for the reaction shown below are: 2 N₂O₅ (g) → 4NO₂ (g) + O₂ (g) rate:  k[N₂O₅]² which mechanism(s) is/are consistent with the rate law given? check all that apply.