A substance with a high [h+] would likely have which additional characteristics?a. a high [ohâ€" ] and a high poh b. a low [ohâ€" ] and a high pohc. a high [ohâ€" ] and a low poh d. a low [ohâ€" ] and a low poh

The endpoint and equivalence point are two significant phases that are attained throughout the procedure.

The chemical equivalent between the added titrant and the sample analyte is referred to as the point of equivalence in a titration. Endpoint, on the other hand, is the location where the color of the solution changes. The equivalence point, or the ideal point for the termination of the titration, occurs when the moles of a standard solution (the titrant) equal the moles of a solution of unknown concentration (the analyte). At the titration's equivalence point, just enough titrant is given to totally neutralize the analyte solution.

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Answer:

Filtration and evaporation

Explanation:

A mixture of sand, pink sugar and water can be separated by filtration and evaporation.

The pink sugar is already dissolved in the water but the sand remains undissolved in the water hence it can be filtered off. The filtrate now contains the sugar.

The sugar is obtained from the filtrate by evaporation of the solution to yield the solid pink sugar and steam which can be condensed again to give liquid water.

1) Gas P is hydrogen as hydrogen burns with a pop sound

2) OH -ve is the ion responsible for making Q alkaline

3)Since OH (-ve ) ion is responsible so it must be basic means Ph is more than 7 or can say between 7 and 14

4)Reaction of calcium with cold water:

Ca (s) + 2H2O (l) --> Ca(OH)2(aq.) + H2 (g)

So basically it is an experiment you also can perform when you hold a lighter near the bubble that formed during the reaction it will burn out with a pop sound.

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Answer:

roman numeral

Explanation:

Explanation:

The reaction between magnesium ribbon and dilute hydrochloric acid is a classic example of a single replacement reaction, which can be represented by the following chemical equation:

Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

In this reaction, magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2).

The rate of this reaction can be altered by changing the concentration of the hydrochloric acid. This is because the rate of a chemical reaction depends on the concentration of the reactants. Specifically, the rate of the reaction is proportional to the concentration of the reactants raised to some power, which is determined by the reaction's rate law.

In this reaction, the rate law can be expressed as:

Rate = k [Mg] [HCl]^x

Where k is the rate constant and x is the order of the reaction with respect to hydrochloric acid. The order of the reaction with respect to magnesium is one, since the concentration of magnesium does not change during the reaction.

When the concentration of hydrochloric acid is increased, the rate of the reaction increases because there are more hydrochloric acid molecules available to collide with magnesium atoms and react. This means that the value of x is greater than zero and the reaction is dependent on the concentration of hydrochloric acid.

Conversely, when the concentration of hydrochloric acid is decreased, the rate of the reaction decreases because there are fewer hydrochloric acid molecules available to react with magnesium. This means that the value of x is less than one and the reaction is not entirely dependent on the concentration of hydrochloric acid.

Answer:

More

Explanation:

Answer:

It is broken down into water and oxygen

Explanation:

2H2O2 -----> 2H2O +O2

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

b) Na, Mg, K

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Decomposition of hydrogen peroxide has a thermodynamic instability. It decomposes at higher temperatures and concentrations to form water and oxygen. Other compounds, such as transition metals like silver and platinum, can catalyze the decomposition of hydrogen peroxide.

In the absence of a catalyst, the reaction of hydrogen peroxide decomposition is very slow at moderate temperatures. It can be accelerated by raising the temperature, which initiates the thermal decomposition reaction. This reaction can take place in either the liquid or vapour phase.

\(H_{2} O_{2}\) is the chemical formula for hydrogen peroxide. It is a very pale blue liquid that is slightly more viscous than water in its pure form. It is used as an oxidizer, bleaching agent, and antiseptic in water, usually in a dilute solution (3%-6% by weight) for consumer use, and in higher concentrations for industrial use. Concentrated hydrogen peroxide, also known as "high-test peroxide," decomposes explosively when heated and has been used as a rocket propellant.

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Answer:

Carbon dioxide is a very soluble gas. It dissolves readily in water. As the oceans formed, carbon dioxide dissolved to form soluble carbonate compounds so its amount in the atmosphere decreased. Carbonate compounds were then precipitated as sedimentary rocks, eg limestone.

Uptake by living organisms

Carbon dioxide was also absorbed from the oceans into photosynthetic algae and plants. Many of these organisms, and the simple organisms in the food chains that they supported were turned into fossil fuels, eg crude oil, coal and natural gas, which all contain carbon.

Coal is a fossil fuel which was formed from trees which were in dense forests in low-lying wetland areas. Flooding caused the wood from these forests to be buried in a way that prevented oxidation taking place. Compression and heating over millions of years turned the wood into coal.

Crude oil and natural gas were formed from simple plants and tiny animals which were living in oceans and lakes. These small organisms died and their remains sank to the bottom where they were buried under sediments. The lack of oxygen prevented oxidation from occurring.

Over millions of years, heat and pressure turned the remains of the organisms into crude oil and natural gas. Natural gas contains the smallest molecules and is often found on top of crude oil, trapped under sedimentary rock.

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Answer:

Changes in the atmosphere

Explanation:

Answer:

The limiting Reactant would be KI

Explanation:

The reaction between KI (potassium iodide) and Na2SO4 (sodium sulfate) is a double displacement reaction. In this type of reaction, the cations and anions of two different compounds switch places, forming two new compounds.

The balanced chemical equation for this reaction is: KI (aq) + Na2SO4 (aq) → K2SO4 (aq) + NaI (aq)
In this reaction, the potassium (K) ions from KI switch places with the sodium (Na) ions from Na2SO4, forming new compounds K2SO4 (potassium sulfate) and NaI (sodium iodide).

It is important to note that this reaction only occurs when both compounds are in aqueous (dissolved in water) form. If either compound is in solid form, the reaction will not occur.
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The relative formula mass of 12 kg of aluminum oxide would be101.93 amu.

The relative formula mass of a compound is the sum of the relative atomic masses of the atoms that make up the compound.

Aluminum oxide goes by the chemical formula, \(Al_2O_3\). In other words, there are 2 atoms of aluminum and 3 atoms of oxygen.

The relative atomic mass of aluminum is 26.98

The relative atomic mass of oxygen is 15.99

Thus, the relative formula mass of aluminum oxide would be:

= (26.98x2) + (15.99x3)

= 101.93 amu

In other words, the relative formula mass of 12 kg of aluminum oxide would be 101.93 amu.

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The number of unpaired electrons in a complex ion depends on the number of electrons in the d-orbitals of the metal ion. The d-electron configuration of each complex ion is as follows: 1) d5, 2) d3, 3) d8, 4) d5, and 5) d2.

The complex ion with the fewest number of unpaired electrons will be the one with the highest d-electron pairing energy, which is the energy required to pair up electrons in the same orbital. The complex ion with the highest pairing energy is [Ni(NH3)6]2+, with all of its electrons paired up. Therefore, the answer is 3) [Ni(NH3)6]2+.

The octahedral complex ion with the fewest number of unpaired electrons is 3) [Ni(NH_3)_6]^2+. This is because Ni^2+ has an electron configuration of 3d^8, which means all its d-orbitals are either completely filled or contain paired electrons. In contrast, the other complex ions have metal ions with more unpaired electrons in their d-orbitals, such as Fe^3+ (3d^5), Cr^3+ (3d^3), Rh^3+ (4d^6), and V^3+ (3d^2). The ligands in each complex do not significantly affect the number of unpaired electrons. Thus, [Ni(NH_3)_6]^2+ has the lowest number of unpaired electrons among the given options.

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Answer: Option 1

Explanation: hopes it helps

Valence Shell Electron Pair Repulsion (VSEPR) theory is employed in prophesying the geometrical organisation of the specific molecule with the aid of electron sets found encompassing the atom.

The correct answer is:

Option A. If a molecule has four pairs of electrons, it will always have a tetrahedral structure.

This can be explained as:

Therefore atom containing four pairs of electrons will have a tetrahedral shape.

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Answer:

3.2 moles of H2SO4

Explanation:

We need to start with a balanced equation.  Lets assume the sulfuric acid is formed from sulfur dioxide and water.

   SO2 + H2O = H2SO4

This equation is balanced.  (Check it)

It tells us that 1 mole of SO2 will form 1 mole of H2SO4, if the reaction proceeds as planned.  That's a molar ratio of 1 to 1.  They are equal.  What moles we react, we should expect the same number of moles of product.  [And we need 1 mole of water at the same time]

So if we react 3.20 moles of sulfur dioxide, and keep out lab partner back, we'll obtain 3.2 moles of H2SO4.

The study conducted by Janzen and Bettany in 1984 investigated the influence of nitrogen and sulfur fertilizer rates on the sulfur nutrition of rapeseed plants.

The researchers examined the relationship between the application rates of nitrogen and sulfur fertilizers and their effects on the growth and sulfur uptake of rapeseed plants.

In their study, Janzen and Bettany focused on understanding the impact of nitrogen and sulfur fertilizers on rapeseed plants' sulfur nutrition. They conducted experiments where different rates of nitrogen and sulfur fertilizers were applied to the soil, and the growth and sulfur uptake of rapeseed plants were measured. The researchers aimed to determine the optimal fertilizer rates that would promote adequate sulfur nutrition in the plants, leading to better growth and development.

The study's findings provided insights into the relationship between nitrogen and sulfur fertilizers and their influence on rapeseed plants' sulfur nutrition. This information can be valuable for agricultural practices, helping farmers optimize fertilizer application to enhance crop yield and quality. Additionally, the study contributes to the broader understanding of plant nutrient interactions and the importance of sulfur nutrition in the growth of rapeseed plants.

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Answer:

Whats the question

Explanation:

Answer:

Where is the question?

Explanation:

Anyways hru all? I've been pretty good

Answer:

4

Explanation:

The given atomic structure appears to have 2 shells/orbits containing electrons – 2 in the inner orbit and 4 in the outer orbit.

Since valence electrons are the electrons present in the outermost orbit/shell of an atom, their number in the given atom becomes 4. (If the 2nd orbit is the outermost orbit, the number of electrons it contains becomes the number of valence electrons).

Why is the number of valence electrons important?

Atoms are neutral, that contain an equal amount of positive and negative charges. All atoms are not stable. Their stability depends upon the number of electrons in specific orbits,( for eg 2 in the innermost orbit, then 8, 18 and so on.)

Valence electrons are loosely attracted by the nucleus and hence can easily be removed from an atom. The number of valence electrons an atom needs to donate/share/accept becomes its valency.

For elements and compounds to exist, the atoms they contain demand stability – which can only be attained by the loss/gain of these valence electrons.

_________________

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Answer:0.137

Explanation:

Answer:

c = 0.39 J/g.°C

Explanation:

Given data:

Energy required = 242.2 J

Mass of copper = 81.6 g

Initial temperature = 27.5°C

Final temperature = 35.2°C

Specific heat capacity of copper = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 35.2°C -  27.5°C

ΔT = 7.7°C

242.2 J = 81.6 g ×c ×  7.7°C

242.2 J / 81.6 g = c ×  7.7°C

c = 3 J/7.7g.°C

c = 0.39 J/g.°C

The largest atom or ion among the options given is option D, Ca2+.

What are atoms and ions?

An atom is the basic unit of matter that makes up all elements. An atom is composed of a nucleus, which contains protons and neutrons, and electrons, which occupy energy levels or orbitals surrounding the nucleus.

An ion is an atom or molecule that has gained or lost one or more electrons. When an atom loses one or more electrons, it becomes a positive ion, or cation. When an atom gains one or more electrons, it becomes a negative ion, or anion. Ions are formed by the transfer of electrons from one atom to another.

The size of an atom or ion is determined by the number of electrons it has in its outermost energy level, or valence shell. The more electrons an atom or ion has in its valence shell, the larger it will be. The valence electron number (VNE) of an element is a measure of how many electrons it has in its valence shell.

Option A, K, is the symbol for potassium, which has 19 electrons, so it has a VNE of 1.

Option B, K+, is a potassium ion that has lost one electron, so it has 18 electrons and a VNE of 0.

Option C, Ca, is the symbol for calcium, which has 20 electrons, so it has a VNE of 2.

Option D, Ca2+, is a calcium ion that has lost two electrons, so it has 18 electrons and a VNE of 0.

Option E, Li, is the symbol for lithium, which has 3 electrons, so it has a VNE of 1.

Since Ca2+ has less electrons than K, Ca, and Li, it has a smaller electron cloud, which makes it the largest among the options given.

Hence, the largest atom or ion among the options given is option D, Ca2+.

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The ion crucial to skeletal muscle fiber contraction is C) Ca2+ (calcium ions). Calcium ions play a key role in initiating the sliding filament mechanism, which leads to muscle contraction in skeletal muscle fibers.

The distance between an atom's nucleus and its last electron in its outermost shell is known as the ionic radius. An atom's ionic radius falls when it loses an electron (becomes a cation), but it increases when it gets an electron (becomes an anion).

As we well know, chemical synapsis is the form of synapsis that causes muscular contractions; therefore, when calcium enters, a neurotransmitter is released that stimulates the neighbouring cell, and sodium enters.

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Answer:

The three methods of heat transfer include: conduction, convection, and radiation. It is through one of these processes of heat transfer that the air temperature over water is warmer than the water over land during the winter months. You'll notice on the graph, that January (month 1) and February (month 2) water temperatures are about 20 degrees while the respective air temperatures are about 15 degrees. This is a 5 degree difference in temperature between the air and the water at the same geographical location. Which process do you believe to be the cause of the air temperature differences between land surfaces and a body of water? A) Heat goes directly from water to air through conduction. B) The heat of the ocean is being radiated into the air through the process of radiation. C) Cooler air is replaced by warmer air rising from the surface in the process of convection. D) Heat is transferred through the circulation of the water through the atmosphere in the process of convection.

Explanation:

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Answer:

Im pretty sure its convection

P2 = 54.6 kPa

Explanation:

Given:

V1 = 10.0 L. V2 = 50.0 L

P1 = 273 kPa. P2 = ?

We can use Boyle's law to solve this problem.

P1V1 = P2V2

Solving for P2,

P2 = (V1/V2)P1

= (10.0 L/50.0 L)(273 kPa)

= 54.6 kPa

Answer:

d = 3 g/cm³

Explanation:

Given data:

Mass of stone = 27 g

Volume of water = 10 cm³

Volume of water+ stone = 19 cm³

Volume of stone = ?

Density of stone = ?

Solution:

Volume of stone = total volume - volume of water

Volume of stone = 19 cm³ -  10 cm³

Volume of stone = 9 cm³

Density of stone:

d = m/v

d = 27 g/ 9 cm³

d = 3 g/cm³

The composition of the alpha phase in the alloy is 45 wt % A.

To find the composition of the alpha phase in the alloy (A-B), we can use a mass balance approach.

Let's assume we have a total mass of 100 grams of the alloy. Given that the mass fraction of both the alpha and beta phases is 0.5, we can determine the mass of each phase.

Mass of alpha phase = 0.5 × 100 grams

= 50 grams

Mass of beta phase = 0.5 × 100 grams

= 50 grams

Now, let's consider the composition of the beta phase, which is 90 wt % B and 10 wt % A. We can calculate the mass of each element in the beta phase.

Mass of B in beta phase = 90 wt % × 50 grams

= 45 grams

Mass of A in beta phase = 10 wt % × 50 grams

= 5 grams

Since the total mass of the alpha phase is 50 grams and the total mass of A in the beta phase is 5 grams, we can subtract the A mass in the beta phase from the alpha phase to get the composition of the alpha phase.

Composition of A in alpha phase = 50 grams - 5 grams

= 45 grams

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Answer:

Your answer is 92.48 degrees Fahrenheit, or just 92 degrees.

Explanation:

The formula for finding degrees Celsius and turning them into Fahrenheit is: (C x 9/5) + 32. So,

33.6 x 9/5 = 60.48

60.48+ 32= 92.48.

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