Why is it not possible to use solid sodium hydroxide directly to make a standard NaOH
solution?

Answer: 23.0ºC

Explanation:

Just trust me

ice particles have a strong bonding and arranged regularly so the atom is very close bond to each other in regular arrangement.

the liquid bonding is weaker than ice and the movement of atom is slightly flow around so the atom is slighty close to each other,

vapor bonding is weaker than the liquid and the atom movement is in all direction so the atom of water in this state is far apart from each other and move in all direction

Answer:

No

Explanation:

The stronger the intermolecular forces the molecules tend to stay in the liquid phase. Compounds with weak intermolecular forces are more volatile and more molecules overcome those forces to pass to the gas phase.

Answer:

1) Without our atmosphere we wouldn't have life! The atmosphere protects our earth from letting harmful substances or rocks into our planet, which could cause damage.

2) You interact with the atmosphere in both good ways and bad. You interact by putting up things like flowers and trees, but in bad ways by releasing bad things (like carbon dioxide) and by light pollution!

3) The factors that can affect climate of an area, by latitude and longitude!

Explanation:

Hope this helps! Plz mark as brainliest! :)

Answer:

25

Explanation:

fing the highest common factor

pime factorisation:

125=5×5×5

150=2×3×5×5

225=3×3×5×5

find the common numbers in all prime numbers

》5×5=25

Answer:

a: palladium or Pd

b: arsenic or As

c: magnesium or Mg

d: radon or Rn

e: francium kr Fr

Explanation:

i looked at the periodic table haha

a. The element in group 10 and period 5 is palladium or Pd. b. The element in group 15 and period 4 is arsenic or As.  c. The element in group 2 and period 3 is magnesium or Mg. d. The element in group 18 and period 6 is  radon or Rn. e. The element in group 1 and period 7 is francium or Fr.

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

A substance is considered to be an element if it cannot be reduced to a less complex form. They can be identified by their particular atomic number. The periodic table groups the elements according to their atomic number and draws attention to those with related qualities.

Each element's atom contains a specific number of protons. For instance, a carbon atom has six protons compared to the one proton in a hydrogen atom. Ions are created by changing the number of electrons in an element's atom.

Thus,  The element in group 10 and period 5 is palladium or Pd.

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Answer:

Include:

--Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

--Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

--Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

I Hope This Helps You!

Answer:

Dot structures do not show the distribution of electrons in orbitals and take up a lot of space.

Arrow and line diagrams take up a lot of space and make it difficult to count electrons.

Written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Explanation:

edge.

We know the standard reduction potentials of the half-cells involved, so we can find the cell voltage and the spontaneous reaction. Thus;

The anode reaction is:

Pb(s) → Pb2+(aq) + 2e-

This is the oxidation half-reaction that occurs in the Pb half-cell.

The cathode reaction is:F2(g) + 2e- → 2F-(aq).

This is the reduction half-reaction that occurs in the F2 half-cell.

The spontaneous cell reaction is

:Pb(s) + F2(g) → Pb2+(aq) + 2F-(aq).

This is the combination of the oxidation and reduction half-reactions, with the electrons canceled out from both sides.

The cell voltage is 2.996 V The standard cell potential is calculated as follows:

standard cell potential = E°(reduction) - E°(oxidation)standard cell potential = 2.870 V - (-0.126 V)standard cell potential = 2.996 V, The cell voltage is positive, indicating that the reaction is spontaneous.

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Answer:

Elemental mercury is the most common form. It is a metallic, silvery liquid ( also referred to as quicksilver) that is processed from an ore called cinnabar. It readily breaks into droplets and easily vaporizes at room temperature into an odorless, colorless vapor that can easily be inhaled.

Explanation:

The repeating monomer unit of polyglycine is simply the amino acid glycine. The chemical structure of glycine is:

H

|

H2N — C — COOH

|

H

The polymerization of glycine involves the condensation of the amino group (-NH2) of one glycine molecule with the carboxyl group (-COOH) of another glycine molecule, releasing a molecule of water (H2O) in the process. The resulting bond is called a peptide bond, and it connects the carbon atom of one glycine molecule to the nitrogen atom of the other glycine molecule.

The repeating monomer unit of polyglycine can be represented as:

H          H          H

|          |          |

H2N — C — CO — NH — C — CO — NH — C — COOH

|                               |

H                               H

Note that the NH group on the left side of the monomer unit represents the amino group of one glycine molecule, and the CO group on the right side represents the carboxyl group of the other glycine molecule. This pattern repeats indefinitely to form the polyglycine polymer.

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Answer:

NO ONE DOSE :(

Explanation:

Answer:

The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10 -7 m, which is red).

(Hope this helps) Sky

Answer:

the bike is moving at a speed of 0.115810 mph

Nitrogen dioxide (NO2) reacts with water (H2O) to form nitric acid (HNO3). The reaction occurs through a series of steps involving the dissolution of NO2 in water and subsequent chemical reactions.

Initially, when nitrogen dioxide is dissolved in water, it forms nitric acid by undergoing the following reaction:

NO2 + H2O → HNO3

The nitrogen dioxide molecule reacts with a water molecule to produce a molecule of nitric acid. In this reaction, the oxygen atom from the water molecule combines with the nitrogen atom from the nitrogen dioxide molecule to form the nitric acid molecule.

The reaction is facilitated by the presence of water, which acts as a solvent and allows the dissolution and subsequent chemical transformation of nitrogen dioxide into nitric acid.

This reaction is an important step in the formation of nitric acid, which has various industrial applications, including the production of fertilizers, explosives, and certain chemicals.

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Answer:

50 moles

Explanation:

took the quiz

Here's link to the answer:

tinyurl.com/wpazsebu

There are approximately 1.067 x 10²⁴ molecules in 230 grams of CoCl₂ (cobalt(II) chloride).

To determine the number of molecules in 230 grams of CoCl₂ (cobalt(II) chloride), we need to use the concept of molar mass and Avogadro's number.

The molar mass of CoCl₂ can be calculated by adding up the atomic masses of its constituent elements: cobalt (Co) and chlorine (Cl). The atomic mass of cobalt is approximately 58.93 grams/mol, and chlorine has an atomic mass of approximately 35.45 grams/mol. Since there are two chlorine atoms in one CoCl₂ molecule, we multiply the atomic mass of chlorine by 2.

Molar mass of CoCl₂ = (58.93 g/mol) + 2*(35.45 g/mol)

                    = 129.83 g/mol

Now, we can use the molar mass to calculate the number of moles of CoCl₂ in 230 grams:

Number of moles = Mass (g) / Molar mass (g/mol)

                = 230 g / 129.83 g/mol

                ≈ 1.771 moles

Finally, we can use Avogadro's number, which is approximately 6.022 x 10²³ molecules/mol, to calculate the number of molecules:

Number of molecules = Number of moles x Avogadro's number

                   ≈ 1.771 moles x (6.022 x 10²³ molecules/mol)

                   ≈ 1.067 x 10²⁴ molecules

Therefore, there are approximately 1.067 x 10²⁴ molecules in 230 grams of CoCl₂.

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i)   Either Q or R could potentially form an ionic bond with S because the element S has the highest electronegativity (6), while the other two elements have lower electronegativity values.

ii)

S and Q are more likely to form a polar covalent bond because the electronegativity difference between S and Q (6 - 3.64 = 2.36) is greater than the electronegativity difference between S and R (6 - 3 = 3).

iii)

The electronegativity difference between Q and R (3.64 - 3 = 0.64) is relatively small, indicating that they are more likely to form a non-polar covalent bond.

In a polar covalent bond, the electrons are shared unequally between the two atoms, thus creating a partial positive charge on one atom and a partial negative charge on the other.

The greater the difference in electronegativity between the two atoms, the more polar the bond will be.

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In molecules of carbon dioxide both the carbon and oxygen atoms are hybridized. The hybridization of carbon is sp hybridize. the oxygen is sp² hybridizes.

The molecule of the carbon dioxide is given as :

   ..            ..

 : O = C = O :

The hybridization is given as :

the steric number = no. of lone pairs + no. of the atoms attached directly

The steric number of carbon, C = 0 + 2

                                                      = 2

that means it has sp hybridize.

the steric number = no. of lone pairs + no. of the atoms attached directly

The steric number of oxygen , O  = 2 + 1

                                                       = 3

so, the oxygen atom has sp² hybridizes.                          

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The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.

Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.

The balanced chemical equation for this synthesis reaction is:

Mg + Cl₂ ⇒ MgCl₂

Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.

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The pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure, and many other vital physical functions and processes.

(Puberty is a big catch-all.)

The functional group of vanillin that is mostly responsible for the slight water solubility is the hydroxyl group (-OH).

Vanillin is not completely soluble in water because it is an organic compound composed of non-polar molecules, which are not able to form hydrogen bonds with water molecules. This means that, even though vanillin is slightly soluble in warm water, it is not completely soluble and can be recrystallized from the water. Vanillin is an organic compound composed of a phenolic group (-C6H5OH) and an aldehyde group (-CHO). The phenolic group is responsible for its characteristic odor, while the aldehyde group is responsible for the slight water solubility of vanillin. The hydroxyl group (-OH) in the phenolic group is mostly responsible for the slight water solubility of vanillin, as it can form hydrogen bonds with water molecules.

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The volume of compressed gas will be 67.2 ml.

A gas is compressed from 1.08 atm to 2.72 atm at constant temperature and the volume of the gas would result if 169 mL of neon gas are compressed. We can utilize Boyle’s law in order to calculate the result of the compressed gas.

Initial volume of neon gas is given as V₁=169 mL, Initial pressure of neon gas is given as P₁=1.08 atm.Final pressure of neon gas is given as P₂=2.72 atm.

Boyle’s Law states that for a fixed amount of gas at a constant temperature, pressure is inversely proportional to volume. Mathematically, this law can be expressed as follows:P₁V₁=P₂V₂Where, V₂ is the final volume of gas after compression, and P₂ is the final pressure of gas after compression. The volume of compressed gas can be calculated as follows:

V₂= (P₁V₁)/P₂V₂= (1.08 atm × 169 mL)/2.72 atmV₂= 67.2 mL

Boyle’s Law states that for a fixed amount of gas at a constant temperature, pressure is inversely proportional to volume. This law is used to calculate the final volume of a gas after compression. If the initial volume of a gas is given, along with the initial pressure and the final pressure, the final volume of the gas can be calculated.

The formula for Boyle’s Law is:P₁V₁=P₂V₂Where, V₂ is the final volume of gas after compression, and P₂ is the final pressure of gas after compression. In order to calculate the final volume of a gas after compression, the initial volume of the gas, the initial pressure of the gas, and the final pressure of the gas must be known.

Once these values are known, the final volume of the gas can be calculated using the formula provided above. For example, if the initial volume of a gas is 169 mL, and the initial pressure is 1.08 atm, and the final pressure is 2.72 atm, the final volume of the gas can be calculated as follows:V₂= (P₁V₁)/P₂V₂= (1.08 atm × 169 mL)/2.72 atmV₂= 67.2 mLTherefore, the volume of compressed gas is 67.2 mL.

the volume of gas that would result if 169 mL of neon gas is compressed from 1.08 atm to 2.72 atm at constant temperature is 67.2 mL. This was calculated using Boyle’s Law, which states that pressure is inversely proportional to volume at constant temperature. The initial volume of the gas, the initial pressure of the gas, and the final pressure of the gas were used to calculate the final volume of the gas using the formula P₁V₁=P₂V₂.

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Answer:

CaO

Explanation:

Group 2 Carbonates decompose to form oxides of the Group 2 element and Carbon dioxide

Answer:

Explanation:  It's simple work really but the answers are

Li : 1

I : 7

B : 3

P : 5

Mg : 2

The number of valence electrons in Li, I, B, P, and Mg are 1, 7, 3, 5, and 2 respectively.

Valence electrons can be defined as the electrons filled in the outermost shell of an atom while the electrons in the inner electron shell are called core electrons. Lewis structures can be helpful to find the number of valence electrons and knowing the types of chemical bonds.

Valence electrons are occupied in different electron shells and these electrons are responsible for the interaction between atoms and participate in the formation of chemical bonds.

The Lithium element with 2s¹ valence shell configuration so it has one valence electron.

The Iodine element with 5s²5p⁵  valence shell configuration so it has seven valence electrons.

The Boron element with 2s²2p¹ valence shell configuration so it has three valence electrons.

The phosphorous with 3s²3p³ valence shell configuration so it has five valence electrons.

The Magnesium with 3s² valence shell configuration so it has two valence electrons.

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Answer:

a. i. 5.092 × 10²⁰ Hz ii. 588.98554 nm ii. 10667809.11 rad/m

b. i. 5.087 × 10²⁰ Hz ii. 589.58286 nm iii. 10657001.3 rad/m

Explanation:

refractive index, n = λ/λ'  where λ = wavelength in vacuum = and λ' = wavelength in air

a. For λ = 589.15788 nm,

i. Frequency,

f = c/λ where c = speed of light in vacuum = 3 × 10⁸ m/s and λ = 589.15788 nm = 589.15788 × 10⁻⁹ m

So, f = 3 × 10⁸ m/s ÷ 589.15788 × 10⁻⁹ m

= 0.005092 × 10¹⁷ /s

= 5.092 × 10²⁰ /s

= 5.092 × 10²⁰ Hz

ii. Wavelength,

Since n = λ/λ'  where λ = wavelength in vacuum = and λ' = wavelength in air

and n = 1.0002926

λ' = λ/n

= 589.15788 nm/1.0002926

= 588.98554 nm

k = 2π/λ'

= 2π/588.98554 nm

= 0.01066780911 rad/nm

= 0.01066780911 rad/nm × 10⁹ nm/1m

= 10667809.11 rad/m

b. For λ = 589.755 37 nm.,

i. Frequency,

f = c/λ where c = speed of light in vacuum = 3 × 10⁸ m/s and λ = 589.755 37 nm. = 589.755 37 × 10⁻⁹ m

So, f = 3 × 10⁸ m/s ÷ 589.755 37 × 10⁻⁹ m

= 0.005087 × 10¹⁷ /s

= 5.087 × 10²⁰ /s

= 5.087 × 10²⁰ Hz

ii. Wavelength,

Since n = λ/λ'  where λ = wavelength in vacuum = and λ' = wavelength in air

and n = 1.0002926

λ' = λ/n

= 589.755 37 nm./1.0002926

= 589.58286 nm

k = 2π/λ'

= 2π/589.58286 nm

= 0.0106570013 rad/nm

= 0.0106570013  rad/nm × 10⁹ nm/1m

= 10657001.3 rad/m

Answer:

36.04g H2O

Explanation:

2 moles H2O converted into grams using the mass of a mole of water as grams (1.01 x 2 + 16.00 = 18.02g = 1 mole h2o) is 36.04g

i can try to explain further if you want?

Answer: they help stop bacteria and diseases

Explanation:

Answer:

thier job is to fight diseaeses, they make up the immune system of the body

Explanation:

Answer:

They need to use energy from other tress to survive so that they can do basic functions, like absorbing nutrients from the ground, and growing back leaves. They don't have chlorophyll, so they need that energy to do the functions I mentioned above.

Explanation: Hope this helps!

Answer:

Trees need chlorophyll to make energy. Because albino trees don’t have chlorophyll, they can’t create their own energy. So, they must take energy from other trees to survive.

Explanation:

Answer:

315 kg

Explanation:

If the ore is 65% waste material, then the mass of the actual sodium in 1 tonne of ore is:

mass of sodium = 0.35 x 1000 kg = 350 kg

The process of electrolysis separates the sodium from the other components of the ore. The amount of sodium extracted will depend on the efficiency of the electrolysis process, which is typically measured by its Faraday efficiency.

The Faraday efficiency is the ratio of the amount of substance actually produced by electrolysis to the amount predicted by the theoretical stoichiometry of the reaction. For the electrolysis of sodium, the theoretical stoichiometry is:

2 Na+ + 2 e- → 2 Na

This reaction requires 2 moles of electrons (2 Faradays) to produce 2 moles of sodium.

If we assume a Faraday efficiency of 90%, this means that 90% of the theoretical amount of sodium is actually produced by electrolysis. Therefore, the mass of sodium extracted from 1 tonne of ore would be:

mass of sodium extracted = 0.9 x (2/2) x 350 kg = 315 kg

So, the company would extract 315 kg of sodium from 1 tonne of ore that is 65% waste material, assuming a Faraday efficiency of 90%.