An 85 L solution has a pH of 3.0. How many moles of H3O+ are in the solution? o 0.085 mole o 3.0 moles o 0.0010 mole o 0.035 mole

164 g of H₃PO₃ (phosphorus acid) would require 3 moles of H₂O for the reaction.

Given information,

Mass of H₃PO₃ = 164g

Moles of H₃PO₃ = 82 g/mol

The balanced chemical equation:

P₂O₃ + 3H₂O → 2H₃PO₃

For every 2 moles of H₃PO₃ produced, 3 moles of H₂O are required.

The number of moles of H₃PO₃:

Moles of H₃PO₃ = mass of H₃PO₃ / molar mass of H₃PO₃

Moles of H₃PO₃ = 164 g / 82 g/mol

Moles of H₃PO₃ = 2 mol

The number of moles of H₂O:

Moles of H₂O = (3/2) × moles of H₃PO₃

Moles of H₂O = (3/2) × 2 mol

Moles of H₂O = 3 mol

Therefore, 164 g of H₃PO₃ would require 3 moles of H₂O for the reaction.

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Answer:

A chemical reaction is a process in which the chemical bonds of a substance are broken or rearranged. One or more substances are formed with different properties because of this chemical reaction. Examples of chemical reactions are rust, combustion, and oxidation.

Answer:

We have the wavelength which is 10,speed/velocity=340 and frequency=?.

The formula is velocity=frequency × wavelength.

340=f × 10.

340=10f.

frequency=34hertz.

Answer:

34hertz

Explanation:

We have the wavelength which is 10,speed/velocity=340 and frequency=?.

The formula is velocity=frequency × wavelength.

340=f × 10.

340=10f.

frequency=34hertz.

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

Nitrous Acid \(N_{2}O_{3}\)

Nitrogen is in the +3 oxidation state in N2O3. Nitrous acid is a weak acid.

The compound contains nitrogen with an oxidation number of +3 is N₂O₃ and nitrous acid HNO₂. Nitrous acid is a weak acid.

The term oxidation state is defined as the total number of electrons that an atom either gains or loses in order to produce a chemical bond with another atom. The oxidation state is also called as oxidation number.

The formula for calculating oxidation states would be : The Highest Oxidation State for a Transition metal = Number of Unpaired electrons + Two s-orbital electrons.

The compound contains nitrogen with an oxidation number of +3 is N₂O₃ because it can acquire three electrons to form a chemical bond and to complete its outermost orbit (octet).

Thus, The compound contains nitrogen with an oxidation number of +3 is N₂O₃ and nitrous acid HNO₂.

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Answer:

Flame: Flammable materials or substances liable to self ignite when exposed to water or air (pyrophoric), or which emit flammable gas.

Flame

Flame

Exclamation Mark: An immediate skin, eye or respiratory tract irritant, or narcotic.

Exclamation Mark

Exclamation Mark

Gas Cylinder: Gases stored under pressure, such as ammonia or liquid nitrogen.

Gas Cylinder

Gas Cylinder

Corrosion: Materials causing skin corrosion/burns or eye damage on contact, or that are corrosive to metals.

Corrosion

Corrosion

Exploding Bomb: Explosives, including organic peroxides and highly unstable material at risk of exploding even without exposure to air (self-reactives).

Exploding Bomb

Exploding Bomb

Flame Over Circle: Identifies oxidizers. Oxidizers are chemicals that facilitate burning or make fires burn hotter and longer.

Flame Over Circle

Flame Over Circle

Skull and Crossbones: Substances, such as poisons and highly concentrated acids, which have an immediate and severe toxic effect (acute toxicity).  

Skull and Crossbones

Skull and Crossbones

Environmental Hazard: Chemicals toxic to aquatic wildlife. (Non-Mandatory)

Explanation:

Answer:

A. Sodium (Na)

Explanation:

The total number of electrons in the outermost principal energy level of an element is called the valence electrons of that element.

Na (11)---→1s2 2s2 2p6 3s1

There 1 electron in the outermost principal energy level of Sodium. So, the number of valence electron of Sodium is 11.

Answer:

Na

Explanation:

I was learning about it recently, that dude's right, it's Sodium

Answer:

Yes, methanol can be a gas. Methanol is a chemical compound that is composed of carbon, hydrogen, and oxygen atoms. At room temperature and standard atmospheric pressure, methanol is a liquid, but it can easily be converted into a gas by heating it to a sufficiently high temperature.

Methanol has a relatively low boiling point of 148.5 degrees Fahrenheit (64.7 degrees Celsius), which means that it can be readily vaporized at relatively low temperatures. When methanol is heated to its boiling point, it will begin to convert from a liquid into a gas, and will continue to vaporize until it reaches a state of equilibrium with its surroundings.

Methanol gas has a number of important uses, including as a solvent, a fuel, and a starting material for the synthesis of other chemicals. It is also commonly used as a laboratory reagent, due to its low toxicity and low cost.

Answer:

Cinder cone-made of pieces of lava

caldera-bowl-shaped depression

volcanic soil-rich in nutrients

lava plateau-material fills in valleys

shield volcano-wide summit, gentle slope

Explanation:

Just did it

Answer: See image

Explanation: match the landform to its description

Answer:

Explanation:Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room ...

Answer:

i dont knowww bro lollll

Answer:

The level of toxins in solutions

Answer:

The definition of toxicity is: the quality of being toxic or poisonous.

The term for the substance formed during a chemical reaction is product.

Product is the name for the substance that results from a chemical reaction. A chemical reaction is a process that converts one material into another. As a result, during a chemical reaction, new compounds known as products are created.

The species that result from chemical reactions are called products. Reactants undergo a high energy transition state before becoming products in a chemical reaction. The reactants are consumed as a result of this reaction.

For example

CH₄ +2O₂⇒CO₂ +H₂O

Oxygen and methane are reactants while water and Carbon dioxide is the products.

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Answer:

Covalent bond between identical atoms

Covalent bonds occur between identical atoms or between different atoms whose difference in electronegativity is insufficient to allow transfer of electrons to form ions. ... The two hydrogen atoms are attracted to the same pair of electrons in the covalent bond.

The mass of H₂SO₄ that must dissolved in 1.08 liters of solution to make 2.69M solution is 271.52 grams.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

In this case,

The volume of the solution is 1.08 L.

The required molarity of the substance is 2.69M.

So,

we can write,

Molarity = Moles/Volume

Moles = Molariyt x volume

Moles =2.69 x 1.03

Moles = 2.77

Moles = Mass required/molar mass.

Molar mass of H₂SO₄ is 98 g/mol.

Putting values,

2.77=Mass required/98

Mass required = 271.52 grams.

So, 271.52 grams of H₂SO₄ is required to make 2.69M solution.

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Answer:the parts of the body which is nearest to  the ground ie thier back will show discoloration

Explanation:

If the body remains at a position for long hours, the parts of the body which is nearest to  the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.

Answer:

Cu

Explanation:

because it is 39.814% of CuSO4

The chemical reaction between 8.0 mol of O2 and 189 g of C2H4 (ethylene) can be represented as shown below:C2H4 + 3O2 → 2CO2 + 2H2OThe balanced equation for the combustion of C2H4 (ethylene) in oxygen is:C2H4 + 3O2 → 2CO2 + 2H2O.

According to the chemical equation above, 1 mol of C2H4 reacts with 3 mol of O2 to produce 2 mol of CO2 and 2 mol of H2O. Hence, the amount of O2 required for the complete combustion of 8.0 mol of C2H4 will be:3 moles of O2 for 1 mole of C2H48.0 moles of C2H4 require:8.0 mol C2H4 x 3 mol O2/mol C2H4 = 24 mol O2Therefore, 8.0 mol of O2 is sufficient for the combustion reaction.

Therefore, the limiting reagent is C2H4 and the excess reactant is O2. Now, we will calculate the amount of C2H4 used. The molar mass of C2H4 is 28.05 g/mol. So, 189 g of C2H4 is:189 g / 28.05 g/mol = 6.74 mol of C2H4Since the 8.0 mol of C2H4 given in the problem is greater than 6.74 mol of C2H4 calculated above, C2H4 is in excess. Thus, all the C2H4 will not be used up in the reaction, and there will be some C2H4 remaining after the combustion reaction has completed. Hence, some C2H4 will remain after the completion of the reaction.

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Answer:

Molecular formula is CaCl2 i.e. 1 atom of Ca and 2 atoms of Cl . Hence, molecular weight = 1 x 40 + 2 x 35.5 = 40 + 71 = 111 g / mol . But if you look at the weight online, it says 110.98 g / mol , which is close to 111

Explanation:

Hope this helped :)

The 9.713 g sample of hydrogen gas at a pressure of 404.2 torr and a temperature of 47°C occupies a volume of approximately X liters.

To determine the volume of the hydrogen gas sample, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, we need to convert the given values to the appropriate units. The pressure of 404.2 torr can be converted to atmospheres (atm) by dividing it by 760 torr/atm, resulting in 0.531 atm. The temperature of 47°C needs to be converted to Kelvin by adding 273.15, giving us 320.15 K.

Next, we need to calculate the number of moles of hydrogen gas. We can use the molar mass of hydrogen, which is approximately 2 g/mol. Divide the mass of the sample (9.713 g) by the molar mass to obtain the number of moles, which is approximately 4.856 moles.

Now we have all the values we need to solve for the volume. Rearranging the ideal gas law equation to solve for V, we have V = (nRT)/P. Substituting the values, we get V = (4.856 moles * 0.0821 L·atm/(mol·K) * 320.15 K) / 0.531 atm. Solving this equation yields a volume of approximately X liters.

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Answer:

The energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.

Explanation:

There's no diagram....but I kinda figured it from the description.

The best explain at location F is the energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP ( Adenosine triphosphate) that can be used by the cell. Carbon dioxide and water are created as byproducts. The overall equation for aerobic cellular respiration is: In cellular respiration, glucose and oxygen react to form ATP ( Adenosine triphosphate)

Adenosine triphosphate is an organic compound which gives energy to living organisms to drive many operations in living cells such as muscle contraction, muscle pumps, nerve impulse propagation, condensate dissolution, and chemical synthesis.

Therefore, the best explain at location F is the energy consumed by animals in the form of glucose is conserved because it is transformed into chemical energy as carbon dioxide is produced during respiration.

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The moment of inertia about the axis through the center of mass of the two nuclei is approximately $2.95 \times 10⁻⁴⁵ \mathrm{~kg \cdot m²}$.

The moment of inertia of a diatomic molecule about an axis perpendicular to the line joining the nuclei can be calculated using the formula $I = 2 \mu R²$, where $\mu$ is the reduced mass of the system and $R$ is the equilibrium distance between the nuclei.

The reduced mass $\mu$ is given by $\mu = \frac{m_1 m_2}{m_1 + m_2}$, where $m_1$ and $m_2$ are the masses of the individual atoms.

Substituting the given values, we have

$\mu = \frac{(2.21 \times 10⁻²⁵ \mathrm{~kg})²}{2(2.21 \times 10⁻²⁵ \mathrm{~kg})}

= 2.21 \times 10⁻²⁵ \mathrm{~kg}$.

Then, using the equation for moment of inertia, $I = 2 \mu R²$, we have $I = 2(2.21 \times 10⁻²⁵ \mathrm{~kg})(0.447 \mathrm{~nm})² = 2.95 \times 10⁻⁴⁵ \mathrm{~kg \cdot m²]$.

Therefore, the moment of inertia about an axis through the center of mass of the two nuclei and perpendicular to the line joining them is approximately $2.95 \times 10⁻⁴⁵ \mathrm{~kg \cdot m²}$.

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Answer:

1,103.47 milliliters

Explanation:

The total percentage of alcohol from solution A and solution B is 29. In a solution that is a mixture of solution A and B, the percentage of alcohol that would be contributed by solution A would be:--

                   11/29 x 100% = 37.93%

--while the percentage of alcohol that would be contributed by solution B would be:

               18/29 x 100 = 62.07%

Hence, if a mixture of A and B has 320 milliliters of alcohol, the amount of alcohol contributed by B would be:

                     320 x 62.07/100 =  198.624 milliliters

Now, remember that solution B is 18% alcohol. This means that the 18% alcohol content of solution B is 198.624 milliliters. Thus, the total volume of solution B would be:

                 198.624 x 100/18 = 1,103.47 milliliters.

Therefore, the total milliliters of solution B Amanda used would be 1,103.47.

In the balanced equation for the reaction\(MnO_{4}^-(aq) + Fe_{2} ^+(aq) -- > Mn_{2}^+(aq) + Fe_{3}^+(aq)\) in basic aqueous solution, the coefficient for OH−(aq) is 4.

To balance the given equation in basic aqueous solution, we need to ensure that the number of atoms of each element is equal on both sides of the equation and that the overall charge is balanced. Here's how the equation is balanced:

First, we balance the atoms other than hydrogen and oxygen. The equation becomes:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)\)

Next, we balance the oxygen atoms by adding water molecules (H2O):

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)\)

Now, we balance the hydrogen atoms by adding OH−(aq) ions:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)+4OH^-(aq)\)

Therefore, in the balanced equation, the coefficient for OH−(aq) is 4. This balances the hydrogen atoms and ensures that the equation is balanced in basic aqueous solution.

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Answer:

Well, the acetone has a dipole, so dipole-dipole forces will be present. Water has a dipole and can also hydrogen bond, as can isobutyl alcohol.

Explanation:

All the possible intermolecular forces between acetone and water will be dipole - dipole interaction force and hydrogen bond.

The attractive interactions between both the positive ends of one polar molecule as well as the negative ends of another polar molecule were known as dipole-dipole forces.

A hydrogen bond seems to be an electrical attraction between such a hydrogen atom covalently bonded to a much more electronegative "donor" atom and group and maybe another electronegative with a single pair of electrons.

Acetone possesses a dipole, there must be dipole-dipole forces. Isobutyl alcohol, like water, does have a dipole and therefore can hydrogen bond.

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To find the mass of the sample of silver, we can use the formula: q = mcΔT. Where q is the amount of heat energy absorbed, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

Plugging in the values we have:

255 J = m x 0.235 J/(g°C) x 23.1°C

Simplifying, we get:

255 J = 5.4335 m

Dividing both sides by 5.4335, we get:

m = 46.9 g

Therefore, the mass of the sample of silver is 46.9 g.

To find the mass of the silver sample when the temperature increased by 23.1°C and 255 J of heat was applied, you can use the formula:

Q = mcΔT

where Q is the heat energy (255 J), m is the mass of the sample (in grams), c is the specific heat capacity of the substance (in J/(g°C)), and ΔT is the temperature change (23.1°C).

For silver, the specific heat capacity is 0.235 J/(g°C). Now we can rearrange the formula to solve for the mass (m):

m = Q / (cΔT)

Plugging in the given values:

m = 255 J / (0.235 J/(g°C) × 23.1°C)

m ≈ 47.45 g

The mass of the sample is approximately 47.45 grams.

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The mass percentage of water in the hydrated salt is approximately 55.95%.

To calculate the mass percentage of water in the hydrated salt, follow these steps:
Step 1: Calculate the mass of the anhydrous salt.
The given formula mass of the anhydrous salt is 126.835 g/mol.
Step 2: Calculate the mass of 10 moles of water.
Since there are 10 moles of water associated with the hydrated salt, the mass of water can be calculated as:
Mass of water = (10 moles) × (18.015 g/mol) = 180.15 g.
Step 3: Calculate the mass of the hydrated salt.
The mass of the hydrated salt is the sum of the anhydrous salt mass and the water mass.
Mass of hydrated salt = 126.835 g/mol (anhydrous salt) + 180.15 g (water) = 306.985 g.
Step 4: Calculate the mass percentage of water in the hydrated salt.
Mass % of water = (Mass of water / Mass of hydrated salt) × 100
Mass % of water = (180.15 g / 306.985 g) × 100 ≈ 55.95%.
So, the mass percentage of water in the hydrated salt is approximately 55.95%.

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Cu will be produced at the negative electrode for the following reaction:

2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,therefore option (b) is correct.

Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a molten  form.

Characteristics of negative electrode -:

The negative electrode in an electrolytic cell, is the one toward which positively charged particles are attracted.

The cathode has a negative charge because it is connected to the negatively charged .

When an electrolyte is dissolved in water and an electric current is passed through it, the Cations move towards the cathode and Anions move towards anode .

Cu will be produced at the negative electrode for the following reaction:

2CuSO4 (a q) + 2H20 (1) -> 2Cu(s) + 2H2SO4(l) + O2(g) ,hence option (b) is correct.

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The  H2  product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.

The electrode is an electrical conductor or source of electricity that carries electric current or circuit to the non-metallic circuit parts of a circuit, some examples are electrolyte and semiconductor.

The following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O2(g) is a redox reaction in which the negative end is producing the H2 gas and copper gets solidify  at the positive end.

Therefore, H₂  product will be produced at the negative electrode for the following reaction 2CuSO₄ (aq) + 2H₂0 (1) -> 2Cu(s) + 2H₂SO₄(l) + O₂(g). option D is correct.

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One can observe two ionization energy bands in the photoelectron spectra of potassium.

The number of ionization energy bands that can be found in photoelectron spectroscopy depends on the specific atom or molecule being studied, as well as the conditions under which the spectroscopy is performed.

For potassium, the most common form of photoelectron spectroscopy is X-ray photoelectron spectroscopy (XPS), which typically results in the observation of two ionization energy bands one corresponding to the removal of an electron from the 1s orbital and another corresponding to the removal of an electron from one of the higher-energy orbitals, such as the 2p or 2s orbitals.

It's worth noting that the number of ionization energy bands observed can be influenced by various factors, such as the level of energy resolution of the spectrometer and the presence of impurities or other chemical species in the sample. Additionally, the presence of spin-orbit coupling can give rise to additional, splitted peaks in the XPS spectra, which would increase the number of ionization energy bands observed.

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