The forces between water molecules are stronger
than the forces between ethanol molecules. Which
liquid would probably be most difficult for an insect
to walk on? Explain your answer.

The concentration of the HF solution is  0.03.

We know that the concentration has to do with the amount of the substance that is present in the system. We know that what we have is an acid hence we can only talk about the concentration of the acid if we can obtain the amount of the hydrogen ion.

We know that the acid is defined as any substance in which there is the presence of the hydrogen ion is what we call and acid. Since the hydrogen fluoride does have the hydrogen, we can say that the substance that we are dealing with here is an acid.

Thus;

pH = 14 - pOH

pOH = hydroxide ion concentration

pH = hydrogen ion concentration

pH = 14 - 12.5

= 1.5

[HF]  = Antilog (-1.5)

= 0.03

The acid would have a concentration of  0.03.

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Answer:

it was stable because of it was in Potential energy and unstable because it was in kinetic energy or vice Versa. im somehow confused

Answer:Most rivers begin their life high up in the mountains and hills of the world.

Explanation:Rivers flow downhill, not necessarily south. Gravity is the ultimate determining force in terms of water flow. Water will flow downhill from the highest point to the lowest point using the path of least resistance.

Answer:

most rivers begin in a steep high area

To form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

The compound Al2O3, commonly known as aluminum oxide, is formed when two aluminum atoms and three oxygen atoms bond. To determine the number of total electrons that must be transferred to form one formula unit of Al2O3, we first need to find the number of electrons that are present in one formula unit of Al2O3.

Aluminum has an atomic number of 13, which means it has 13 protons and 13 electrons in a neutral atom. Each aluminum atom in Al2O3 contributes 3 electrons, and since there are two aluminum atoms in one formula unit of Al2O3, the total number of electrons contributed by aluminum atoms is 6.

Oxygen has an atomic number of 8, which means it has 8 protons and 8 electrons in a neutral atom. Each oxygen atom in Al2O3 contributes 2 electrons, and since there are three oxygen atoms in one formula unit of Al2O3, the total number of electrons contributed by oxygen atoms is 6.

Therefore, to form one formula unit of Al2O3, a total of 12 electrons (6 from aluminum and 6 from oxygen) must be transferred.

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The  true statement is, the leaving group ability of the heteroatom group determines the reactivity towards nucleophilic acyl substitution.

Nucleophilic acyl substitution describes a class of substitution reactions involving nucleophiles and acyl compounds.

Also, nucleophilic acyl substitution is a type of substitution reaction involving an acyl group and a nucleophile.

Thus, the statement that is true regarding nucleophilic acyl substitution is, the leaving group ability of the heteroatom group determines the reactivity towards nucleophilic acyl substitution.

Thus, in nucleophilic acyl substitution, a nucleophile displaces the leaving group, resulting in a carbonyl compound.

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Explanation:

At 4th point the slump block is located

hope this helps you

have a great day :)

It is point 2, for anyone who sees this is the future

Beakers are simple containers used it to hold materials and reagents, making them among the most extensively used forms of laboratory glassware.

lead glass, borosilicate glass, and soda-lime glass. Around 95% of the cullet material used in manufacturing is made up of these three forms of glass. Special-purpose glass makes up the final 5% of all glass.

The list of glasses covers eyeglasses utilized in the catering sector as well as drinking glasses (drinkware) & crockery used only to arrange a tables for eating a meal. Glassware used in laboratories is excluded.

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Answer:

≈ 76.16%

Explanation:

What is Percent Yield? In chemistry, percent yield is the percent ratio of the weight of the product obtained to the theoretical yield. We calculate the percent yield by dividing the experimental yield by the theoretical yield and multiplying the result by 100 to express the final answer in %.

\(\frac{actual}{theoretical} (100)=percentyield\)  ⇒  \(\frac{278}{365} (100)=76.1643835616\)

≈ 76.16%

hope this helped :)

Answer:

76.16%

Explanation:

I know answer is correct because I got the exact same question :)

The f-block portion of the periodic table spans 14 groups because it includes the rare earth elements, which have partially filled f-orbitals.

The f-orbitals are shielded by the outer electrons in the d- and s-orbitals, which makes them less reactive and more difficult to study.

The 14 groups of the f-block correspond to the 14 different f-orbitals that can be filled by electrons. These f-orbitals are labeled by the principal quantum number n and the azimuthal quantum number l.

For example, the first f-orbital (n=4, l=3) is labeled 4f. The rare earth elements fill the 4f orbital, which is why they are sometimes called the "4f series".

Because the f-orbitals are partially filled and shielded by other electrons, the rare earth elements have similar chemical properties and are difficult to separate from one another. This makes them important for industrial applications, such as in the production of magnets and electronics.

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Answer:

0.333J/g°C is the specific heat of the metal

Explanation:

The heat that the metaal gives is equal to the heat that water is absorbing. The equation is:

S(metal)*ΔT(metal)*Mass(metal) = S(H2O)*ΔT(H2O)*Mass(H2O)

Where S is specific heat, ΔT is change in temperature and mass the mass in grams of the metal and water.

Replacing:

S(metal)*(100.0°C-27.2°C)*125.0g = 4.184J/g°C*(27.2°C-24.3°C)*250.0g

S(metal) = 4.184J/g°C*(27.2°C-24.3°C)*250.0g / (100.0°C-27.2°C)*125.0g

S(metal) = 0.333J/g°C is the specific heat of the metal

Answer:

Nitrogen = 0.3 atm

Oxygen = 0.25 atm

Argon  = 0.45 atm

Explanation:

According to Dalton's law of partial pressure, the total pressure in the container is equal to sum of the partial pressures of the individual gases.

Given;

Total pressure of the gases, P_total = 1 atm

Pressure of nitrogen, P_nitrogen = 0.3 atm

Pressure of oxygen, P_oxygen = 0.25 atm

Pressure of argon, P_argon = ?

\(P_{total} = P_{nitrogen} + P_{oxygen} + P_{argon}\\\\1 \ atm= 0.3 \ atm + 0.25 \ atm + P_{argon}\\\\1 \ atm= 0.55 \ atm + P_{argon}\\\\ P_{argon} = 1 \ atm - 0.55 \ atm\\\\ P_{argon} = 0.45 \ atm\)

Therefore, the contribution of each gas to the total pressure of the gas mixture is;

Nitrogen = 0.3 atm

Oxygen = 0.25 atm

Argon  = 0.45 atm

Answer: hope this helps :)

Explanation:

Heterogeneous:

soy sauce, pizza, fruit salad, halo halo, iced mango juice (assuming this is a mango milkshake), sago milk tea

Homogeneous:

vinegar, salt solution, sugar syrup

abno ka hahaha hatdog hamburger

ANSWER

OPTION B

EXPLANATION:

Compounds are pure substances that are composed of atoms of two or more different elements that are chemically combined together.

Looking at the images provided in the question, you will see that the atoms in model X are chemically combined together due to one of the atoms releasing electrons and the other atom receiving it just to complete their octet structure. Hence, Mode X is a compound because two different atoms are chemically combined together.

The correct option is B

The pressure of the gas in the container when the volume is 132.5 mL is 465.54 torr (rounded to the nearest 0.01) with units of torr.

To solve this question, we can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature. Since the sample of neon is at a constant temperature and the number of moles of gas is constant, we can use the equation P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Using the given values, we can write:
P1V1 = P2V2
(757.2 torr) x (81.4 mL) = P2 x (132.5 mL)
Solving for P2, we get:
P2 = (757.2 torr x 81.4 mL) / 132.5 mL
P2 = 465.54 torr
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The main safety hazards of trimethylsilyl chloride (tmscl)  in the lab are,

It could cause severe eye burns.

It is harmful if absorbed through the skin. It could cause severe burns.

It may be harmful if swallowed. Causes severe digestive tract burns.

It may be harmful if inhaled. Causes chemical burns to the respiratory tract.

Prolonged or repeated skin contact may cause dermatitis.

Trimethylsilyl chloride, commonly referred to as chlorotrimethylsilane, is a silyl halide (organosilicon chemical) with the formula (CH3)3SiCl. It is also referred to as Me3SiCl or TMSCl. It is a volatile, colorless liquid that is stable when there is no water present. It has many applications in organic chemistry.

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Answer:

D

Explanation:

Salinity is the saltiness or amount of salt dissolved in a body of water

Answer:

its b trust me i got it right

Explanation:

Answer: Its true, mental ions and hydrogen ion both have the same type of charge.

Answer:

TRUE, Metal ions, and hydrogen ions both have the same type of charge. Explanation: Metal atoms lose one or more electrons at their maximum energy level and improve positively charged ions. A hydrogen ion is created when a hydrogen atom loses electrons and then becomes positively charged (charge +1).

The temperature on planet X can be determined using the ideal gas law, which states that the product of pressure, volume, and temperature is proportional to the number of moles of gas.

The formula is:

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.

To solve for the temperature on planet X, we need to convert the given volume to liters and the pressure to atmospheres, and then plug the values into the equation.

Given:
Pressure (P) = 0.13 atm
Volume (V) = 3.08 L

First, we need to convert the volume to liters:
3.08 L = 3.08 L

Next, we need to convert the pressure to atmospheres:
0.13 atm = 0.13 atm

Now, we can rearrange the equation to solve for temperature:
T = PV / nR

Since the number of moles (n) and the gas constant (R) are not given in the question, we cannot calculate the exact temperature on planet X. The temperature will depend on the number of moles of gas present and the gas constant, both of which are missing.

Therefore, without the values for n and R, we cannot determine the temperature on planet X. It is important to have all the necessary information to solve a problem accurately.

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Answer:

225kg.m.s

Explanation:

Momentum equals to mass times velocity

Answer:

if youre talking about macros to lose/gain weight then the Macronutrients refer to carbs, fats and protein — the three basic components of every diet. you cant tell them apart by looking at them but read labels and ingredients listed from packages or you can search them up

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C. 0.5

This is the answer.

(assuming that the D option is 1, if it is 0.1 then the answer is 0.1)

\(0.5\)

Explanation:

As you know that decreasing in the concentration of OH- (i.e., 14, 13, 12, 11,..) makes to increase in the concentration of H+ ions (5,4,3,2,1).

We are given that–

\(\qquad\)________________________

As we know –

\(\qquad\)\( \pink{\bf\longrightarrow {Mass = Volume \times Density } }\)

\(\qquad\)\( \bf\longrightarrow Mass_{(Propane)} = 389 \times 19.3 \)

\(\qquad\)\( \bf\longrightarrow Mass_{(Propane)} = 7507.7 \: g\)

\(\qquad\)______________________

Mass of a substance is the amount of the constituting particles per unit volume. The mass of the \(\bold { 389\ cm^3}\) of propane is 7.507 kg.

Mass of a substance is the amount of the constituting particles per unit volume. It is measured in kilograms (kg).

The formula for mass,

M =  v x d

Where,

M - mass

v - volume = \(\bold { 389\ cm^3}\)

d - density = 19.3 g/cm

Put the values in the formula,

M =  \(\bold { 389\ cm^3}\)  x   19.3 g/cm

M = 7507.7 g

M  = 7.507 kg

Therefore, the mass of the \(\bold { 389\ cm^3}\) of propane is 7.507 kg.

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4709.25 joules of heat are absorbed when 25 grams of water increases temperature by 45 K.

Let suppose that temperature change experienced by water is entirely sensible. Then, we can estimated the heat absorbed by the water sample (\(Q\)), in joules, through this expression:

\(Q = m\cdot c \cdot \Delta T\) (1)

Where:

If we know that \(m = 25\,g\), \(c = 4.186\,\frac{J}{g\cdot K}\) and \(\Delta T = 45\,K\), then the heat absorbed by the water sample is:

\(Q = (25\,g)\cdot \left(4.186\,\frac{J}{g\cdot K} \right)\cdot (45\,K)\)

\(Q = 4709.25\,J\)

4709.25 joules of heat are absorbed when 25 grams of water increases temperature by 45 K.

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Answer:

Sodium hydroxide is very corrosive. It can cause irritation to the eyes, skin, and mucous membrane; an allergic reaction; eye and skin burns; and temporary loss of hair. Workers may be harmed from exposure to sodium hydroxide.

Explanation:

How to reduce:

Inhalation: Move victim to fresh air.

Skin Contact: Avoid direct contact

Eye Contact: Avoid direct contact

Ingestion: Have victim rinse mouth with water.

In de Morceau's nomenclature scheme, the smaller atom appears first.

Nomenclature is an organism name system used in biological classification. Genus and species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species to which the creature belongs.

On August 26, 1743, Antoine-Laurent Lavoisier was born in Paris, France. He was a well-known French chemist and a key player in the 18th century chemical revolution. In addition to co-creating the current system for identifying chemical compounds, he established an experiment-based explanation of the chemical reactivity of oxygen.

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Answer:

The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m

Explanation:

The wavelength is defined for every periodic wave, that is, for the type of wave that repeats itself with exactly the same shape every given interval of time. It is the distance between two points from which the wave repeats.

Radiation is the emission, propagation and transfer of energy in any medium in the form of electromagnetic waves or particles.

The energy carried by electromagnetic radiation travels by waves. This energy is transmitted grouped in small "quanta" of energy called photons. The energy of a photon is measured in Joules (J) and is

\(E=\frac{h*c}{wavelength}\)

Being:

and replacing:

\(3.92*10^{-19}J =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s} }{wavelength}\)

you get:

\(wavelength =\frac{6.626*10^{-34}J.s*2.99*10^{8}\frac{m}{s} }{3.92*10^{-19}J}\)

wavelength= 5.054*10⁻⁷ m

The wavelength, λ, of a photon that has an energy of E = 3.92×10⁻¹⁹ J is 5.054*10⁻⁷ m

Answer:

Methane gas will burn in air. This is an example of a combustion reaction. This type of reaction produces CO2 and H2O.

Explanation:

Elements: C, H, O

Reactants: 1, 4, 2

Products: 1, 2, 3

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