When excess potassium hydroxide and H2SeO3 react whats the net ionic reaction for the acid-base rxn

Answer:

Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na⁺ and hydroxide anions OH⁻

Explanation:

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Answer:

radiation is the answer

Answer:

what are sediments???????????????????????

Explanation:

Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.

I hope that helped you.

Answer:

a naturally occurring material that is broken down by processes of weathering and erosion.

Explanation:

Dictionaries help with definitions such as the one I've given you.    :)

Answer:

Testing of thesis testing is used to determine the plausibility of a thesis.

The test assess the plausibility of the thesis of a sample data.

It occurs through different way, the first step is used to test the state the two suppositions.

In the coming step evaluation of data, third step include carry out plan and dissect the data.

The final step is to dissect the results of the data, it can moreover accept the thesis and reject the null thesis.

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Gasoline, rubber, and plastics all use alkane, alkene, and alkyne, respectively. Examples of alkanes include methane (CH4) and ethane (C2H6). Alkenes include substances like propane (C3H8) and ethene.

Alkanes are saturated hydrocarbons in nature. Saturated hydrocarbons are alkanes with only one atom in the chemical structure. The formula for an alkane is CnH2n+2. Methane, butane, propane, and ethane are the four alkanes.

The simplest alkane molecule, methane, is made up of one carbon atom and four covalently bound hydrogen atoms. The compounds were detected as the methyl compound is created when we swap out one hydrogen atom for another atom or molecule.

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Answer:

Explanation:

40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ

Answer:

Option A kinetic energy

As the bow initially was at rest it had potential energy (an object at rest potential energy) and when it was at motion it will kinetic energy (object at rest will have kinetic energy)

Francesca receives a salary that's also 2% more than the previous year's wage each year. Francesca made $169684 in her first year of employment.

It is the total compensation that workers gain before adjustments for taxes, social security, and other expenses. After deduction, an individual's monthly income is the amount that is deposited towards their bank account once a month.

You ought to be placed on the PAYE system (Pay As You Earn). Inside this way, before your employer deposits your operating income into your bank account, they should deduct any taxes and Unemployment Benefit that are owed from your pay.

A = X(1 + r)ⁿ

A = $187345

n = 5 years

r = 2%

X = ?

187345 = X(1.02)⁵

187345 = 1.10408 X

X = $169684.14

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10 molecules of water (H₂O) are produced.

The balanced chemical equation for the reaction between hydrogen and oxygen to produce water is:

2H₂ + O₂ → 2H₂O

This means that for every 2 molecules of hydrogen and 1 molecule of oxygen that react, 2 molecules of water are produced. Therefore, for 10 molecules of hydrogen and 5 molecules of oxygen, the number of molecules of water produced can be calculated as follows:

Number of moles of hydrogen = 10 molecules / 6.022 x 10²³ molecules/mol = 1.66 x 10⁻²³ moles

Number of moles of oxygen = 5 molecules / 6.022 x 10²³ molecules/mol = 8.30 x 10⁻²⁴ moles

From the balanced equation, 2 moles of water are produced for every 2 moles of hydrogen used, or 1 mole of water for every mole of hydrogen used.

Therefore, the number of moles of water produced is equal to the number of moles of hydrogen used, which is 1.66 x 10⁻²³ moles.

Finally, we can convert moles of water to molecules of water by multiplying by Avogadro's number: 1.66 x 10⁻²³ moles x 6.022 x 10²³ molecules/mol = 9.98 molecules, which we can round up to 10 molecules of water.

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Answer:

CO < BF < KI < LiF

Explanation:

The magnitude of ionic character in a bond is dependent on the magnitude of electronegativity difference between the atoms in the bond.

Remember that no bond is 100% ionic or covalent according to Linus Pauling. However, the percentage ionic character depends on electronegativity difference between the bonding atoms and polarizability (Fajan's rules).

Between LiF and KI, Fajan's rules become very important. The Li^+ is small and highly polarizing.  The stronger the polarising power of the cation and the higher the polarisability of the anion the more covalent character is expected in a bond

Answer:

Fe + CuCl2 = FeCl2 + Cu

Explanation:

This is already balanced.

Explanation:

A and D is the answer

Hope the answer is right

Answer:

Explanation:

To solve this problem, we can use the formula:

Molarity (M) = moles of solute / volume of solution in liters

We can rearrange this formula to solve for the volume of solution:

Volume of solution (in liters) = moles of solute / Molarity

First, we need to calculate the number of moles of CuNO3 in the solution. We can do this using the formula:

moles = mass / molar mass

The molar mass of CuNO3 is:

(1 x atomic mass of Cu) + (1 x atomic mass of N) + (3 x atomic mass of O) = (1 x 63.55 g/mol) + (1 x 14.01 g/mol) + (3 x 16.00 g/mol) = 187.55 g/mol

So, the number of moles of CuNO3 in the solution is:

moles = mass / molar mass = 8.70 g / 187.55 g/mol = 0.0464 mol

Now we can use the formula for volume of solution:

Volume of solution (in liters) = moles of solute / Molarity

We know the moles of solute (0.0464 mol) and the molarity of the solution (0.170 M), so we can plug in and solve:

Volume of solution (in liters) = 0.0464 mol / 0.170 mol/L = 0.273 L

Finally, we need to convert the volume from liters to milliliters:

Volume of solution (in milliliters) = 0.273 L x 1000 mL/L = 273 mL

Therefore, the volume of the solution is 273 milliliters.

To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.

The equation of the Ideal Gas Law is the following:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)

Where:

We clear for V₂:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)

Where:

Substituting the known values:

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)

\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)

\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)

The nuclide represented as X is thorium and this is an alpha decay.

The equation shown represents an alpha decay. In an alpha decay, an alpha particle is given off.

The atomic number of the parent nuclide is greater than that of the daughter nuclide by two units while the mass number of the parent is greater than that of the daughter nuclide by four units.

Hence the equation occurs as follows;

\(\frac{232}{92} Th ------> \frac{228}{88} Ra + He\)

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The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

Explanation:

1.1 we have to find mass of Na3PO4;

for that we have to Calculate the moles of Na3PO4 needed:

volume is 100mL = 0.1L

Molar concentration = Moles of solute / Volume of solution in L

0.1 mol/L = Moles of Na3PO4 / 0.1 L

Moles of Na3PO4 = 0.1 mol/L * 0.1 L

Moles of Na3PO4 = 0.01 mol

Now, Calculate the mass of Na3PO4 needed:

so, Mass = Moles of Na3PO4 * Molar mass of Na3PO4

Mass = 0.01 mol * 164 g/mol

Mass = 1.64 g of Na3PO4.

1.2 materials and glassware needed:

1.64 g Sodium phosphate (Na3PO4)

100 mL volumetric flask

weighing balance

Distilled water

Glass rod

Pipette and burette

When a substance or radiation's heat is stated quantitatively, it is called its temperature.

Three different categories of temperature scales exist:

those, like Kelvin's original definition, that solely rely on macroscopic characteristics and thermodynamic concepts;

those that rely on actual, empirical particle qualities as opposed to theoretical concepts;

Additionally, there are scales like the SI scale that are determined by the typical translational kinetic energy per freely moving tiny particle, such as an atom, molecule, or electron in a body.

The equation q = mcΔT, where m is the sample mass, c is the specific heat, and T is the temperature change, can be used to determine how much heat a a sample gains or loses (q).

Therefore,

q = m*c*ΔT

2072.87 = 335 * 4.184 * ΔT

ΔT = 1.479 °c

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Explanation:

The balanced equation is

2  H2        +    02 ======> 2 H2 O

so it takes twice as many H2 moles as O2 to complete the reaction

  the chemist does not have enough  H2 (needs 8 moles)   , so H2 is the limiting reactant .

Covalent and ionic bonds refer to atoms joined by their electrons. In covalent bonds, electrons are shared by the involved non-metal atoms. Option 2 is correct. Occurs due to the sharing of electrons between two non-metal atoms.

Both of them, covalent and ionic bonds, are chemical bonds that can form between atoms.

Ionic bonds occur between atoms with different electronegativity. When they bind, they transfer electrons from one atom to the other creating ions with opposite charges that attract each other.

Ionic compounds are formed by anions and cations.

• Cations are positive ions derivated from metals.

• Anions are negative ions derivated from non-metals.

The metal atoms share its electrons with the non-metal ones, creating stable configurations. Ionic bonds do not create molecules.

Covalent bonds are formed between atoms share electrons to be more stable. Atoms involved share electrons equally, creating a strong bond between them.

Covalent bonds are usually formed between non-metal atoms.

Option 2 is correct. Occurs due to the sharing of electrons between two non-metal atoms

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Complete question

A template of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is shown.

Which of the following characteristics can be written only in space C?

On the diagram,

Options,

Strong bases like sodium ethoxide (NaOEt) or sodium hydroxide (NaOH) are used to treat 2-bromooctane, which then goes through an elimination process (also known as dehydrohalogenation) to produce various alkenes.

Ethene, propene, butene, and pentene are the first four alkenes.

Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.

Both the hydrocarbons alkene and alkyne are unsaturated.

Whereas two Carbon atoms in Alkyne are joined by a triple bond, two Carbon atoms in Alkene only have a double bond.

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Answer:

51.03g/mol is the molar mass of X

Explanation:

Based on the reaction:

2XI₃ + 3Cl₂X → 2XCl₃ + 3I₂

Where 2 moles of XI₃ reacts to produce 2 moles of XCl₃ -The ratio of reaction is 1:1-

To solve this question we must find the mass of X per mole (This is the atomic mass of X).

As the moles of both compounds are the same:

1.196g / 0.436g = Molar mass XI₃ / molar mass XCl₃ (1)

Also:

Molar mass XI₃ = Molar mass X + 380.71g/mol

Molar mass XCl₃ = Molar mass X + 106.36g/mol

Replacing in (1):

2.7431 = (Molar mass X + 380.71g/mol) / (Molar mass X + 106.36g/mol)

2.7431 Molar mass X + 291.76g/mol = Molar mass X + 380.71g/mol

1.7431 Molar mass X = 88.95g/mol

Molar mass X = 51.03g/mol

Answer:

photosynthesis uses light as energy source,and cell respiration uses chemical energy

#1

\(\boxed{\sf {O_3\atop Ozone}\longrightarrow {O_2\atop Oxygen}+{O\atop Atomic\:Oxygen}}\)

2

\(\boxed{\sf {S\atop Sulphur}+{O_2\atop Oxygen}\longrightarrow {SO_2\atop Sulphur\:Dioxide}}\)

The balanced equation of the decomposition reaction is written as below:

\(\rm O_{3}(g) \rightarrow O_{2} (g)+ [O](g)\)

Balanced reaction between atmospheric oxygen and sulphur gas is written as follows:

\(\rm O_{2} (g)+ S_{2} (g)\rightarrow 2 SO_{2}(g)\)

Ozone is a toxic gas formed by the combination of atmospheric oxygen with nascent oxygen gas. Ozone exists as a layer in the stratospheric layer of the atmosphere.

Ozone protects earth from harmful UV rays. Decomposition of ozone results in depletion of ozone layer which leads to the UV radiation reaching intensely to the earth's surface.

The oxygen gas formed from the decomposition of ozone further reacts with sulphur gas as written above produce harmful sulphur dioxide. Sulphur dioxide further reacts with water forms sulphuric acid causes acid rain.

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Answer:

4.33 L

Explanation:

Assuming ideal behaviour and that all 0.300 moles of gas reacted, we can solve this problem using Avogadro's law, which states that at constant temperature and pressure:

Where in this case:

We input the given data:

And solve for V₂: