How does the structure of water molecules account for adhesion.

Answer:

i think its 8

Explanation:

O4 is 4 oxygen  and then its doubled with the 2 at the end

Answer:

Metalloid

Explanation:

A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals. There is neither a standard definition of a metalloid nor complete agreement on the elements appropriately classified as such

Answer:

The empirical formula for a compound is The molar mass of the compound is 93 grams/mole. n=2 is 0

Explanation:

is what I got

Answer:

216 K

Explanation:

T2=T1P2/P1

Change C to K

At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.

The equilibrium constant (Keq) is the ratio of the product of the concentrations of the products to the product of the concentrations of the reactants, all raised to their stoichiometric coefficients.

Only gases and aqueous species are included.

        NH₄SH(s) ⇋ NH₃(g) + H₂S(g)

I                                 0           0

C                               +x          +x

E                                x            x

Keq = 1.2 × 10⁻⁴ = [NH₃] [H₂S] = x²

x = 0.011 M

At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.

Learn more about equilibrium here: https://brainly.com/question/5081082

#SPJ1

Answer:

Ideal Gas Law?

Explanation:

PV = nRT

V is proportional to T thus at constant P it should increase with T

Answer:

The law that states that volume increases with temperature (at constant pressure) is known as Gay-Lussac's Law or the pressure-volume law. It states that the volume of a gas is directly proportional to its temperature, when the pressure is kept constant. This means that if the temperature of a gas is increased, its volume will also increase, and if the temperature is decreased, the volume will decrease. This law is a part of the ideal gas laws, which describe the behavior of gases under various conditions.

Hope this helps! Enjoy Learning!<3

Under these conditions, a hydrogen-oxygen fuel cell can generate an electrical potential of about 1.23 volts, which is the standard potential for the cell.

The actual voltage output of the cell depends on various factors such as the efficiency of the cell, the operating conditions, and the load connected to the cell.

The chemical reaction that occurs in a hydrogen-oxygen fuel cell is the combination of hydrogen and oxygen to form water, with the release of energy.

This reaction occurs at the anode and cathode of the fuel cell, and the energy released is converted into electrical energy.

The overall chemical reaction for a hydrogen-oxygen fuel cell is:

2H2 + O2 → 2H2O

At the anode, hydrogen is oxidized to produce protons and electrons:

H2 → 2H+ + 2e-

The protons generated in this reaction move through the electrolyte to the cathode, while the electrons flow through an external circuit, generating electrical current.

At the cathode, oxygen is reduced to form water, with the protons and electrons combining with oxygen:

O2 + 4H+ + 4e- → 2H2O

This reaction generates more protons, which move back to the anode through the electrolyte, completing the circuit.

Overall, a hydrogen-oxygen fuel cell is an efficient and clean source of electrical energy, with the only byproduct being water.

To know more about conditions refer here

https://brainly.com/question/29418564#

#SPJ11

The final volume of the reconstituted cefazolin solution is 4 mL.  The volume of the cefazolin powder is 0.6 mL. The final volume of the 100 mg/mL cefazolin solution is 10 mL.

The packaging insert instructs to add 3.4 mL of sterile water without bacteriostat to the 1-g vial of cefazolin. This results in a reconstituted solution with a concentration of 250 mg/mL.

To find the final volume, we can set up the equation:

Concentration of reconstituted solution = Amount of drug / Final volume

Using the given concentration (250 mg/mL) and the amount of drug (1 g = 1000 mg), we can rearrange the equation to find the final volume:

250 mg/mL = 1000 mg / Final volume

Solving for the final volume:

Final volume = 1000 mg / 250 mg/mL = 4 mL

Therefore, the final volume of the reconstituted cefazolin solution is 4 mL.

To find the volume of the cefazolin powder, we need to subtract the volume of sterile water added from the final volume of the reconstituted solution.

Given that 3.4 mL of sterile water is added to the vial, and the final volume of the reconstituted solution is 4 mL, we can calculate the volume of the cefazolin powder as follows:

Volume of cefazolin powder = Final volume - Volume of sterile water added

Volume of cefazolin powder = 4 mL - 3.4 mL = 0.6 mL

Therefore, the volume of the cefazolin powder is 0.6 mL.

To determine the final volume of the 100 mg/mL cefazolin solution, we can use the concentration and the amount of drug.

We are given that the resulting concentration after reconstitution should be 100 mg/mL. Considering the amount of drug is 1 g (1000 mg), we can set up the following equation:

Concentration of reconstituted solution = Amount of drug / Final volume

Using the given concentration (100 mg/mL) and the amount of drug (1000 mg), we can rearrange the equation to find the final volume:

100 mg/mL = 1000 mg / Final volume

Solving for the final volume:

Final volume = 1000 mg / 100 mg/mL

Final volume = 10 mL

Therefore, the final volume of the 100 mg/mL cefazolin solution is 10 mL.

To know more about cefazolin visit:

https://brainly.com/question/8549780

#SPJ11

The amount of calcium ingested by drinking eight 8-oz glasses of local water is 0.0041655 mol. By drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

1. To calculate the amount of calcium ingested by drinking eight 8-oz glasses of local water, we need to know the volume of water and the concentration of calcium ions present in it.1 oz = 29.57mL

So, eight 8-oz glasses of water = 8 x 8 oz = 64 oz= 64 x 29.57 mL = 1892.48 mL1 L = 1000 mL

Therefore, the volume of water in liters = 1892.48/1000 = 1.8925 L

Concentration of Ca ions in water = 0.0022 mol/L

So, the amount of calcium ingested = concentration of calcium x volume of water= 0.0022 mol/L x 1.8925 L= 0.0041655 mol of calcium

2. To calculate the percentage of the daily requirement of calcium met by drinking 1.0L of local water, we need to convert the amount of calcium in moles to milligrams (mg). The molar mass of calcium is 40.08 g/mol.0.0041655 mol of calcium weighs = 0.0041655 mol x 40.08 g/mol = 0.16685464 g or 166.85 mg

The percentage of the daily requirement of calcium met by drinking 1.0L of local water is given by the formula:

Percentage of daily requirement met = (amount of calcium in water/daily requirement of calcium) x 100%Daily requirement of calcium = 1150 mg

Percentage of daily requirement met = (166.85 mg/1150 mg) x 100%≈ 14.5 %

Therefore, by drinking 1.0L of local water, approximately 166.85 mg of calcium is ingested, which is 14.5% of the daily requirement of calcium.

More on calcium: https://brainly.com/question/30054587

#SPJ11

Answer:

the oil spreads to cover the water

Answer:

I think it is ; The oil floats to the surface of the water

Explanation:

I don't know about the other one.

55.44 K is the temperature that need to change in order for the neon gas to be 39.0% faster than the RMS speed of the argon.

Given

RMS speed of argon = 1.20 km/sec = 1.20 ×\(10^{3}\) m/sec

RMS speed of neon = 39% faster than the speed of argon

                                 = RMS speed of argon + \(\frac{39}{100}\) RMS speed of argon

                                 = RMS speed of argon ( 1 +0.39)

RMS speed of neon = 1.39 times of RMS speed of argon

Hence   \(\frac{v_{ne} }{v_{ar} } = \frac{1.39}{1}\) … (1)

The atomic mass of argon is 39.95 g/mol = 39.95×\(10^{-3}\) Kg/mol

and  the atomic mass of neon is 20.18 g/mol = 20.18 ×\(10^{-3}\) Kg/mol

According to the formula of root-mean-square velocities of gas molecules

\(v_{rms} = \sqrt{3RT/M}\) where,

\(v_{rms}\) = root-mean-square velocity

M = molar mass of gas (in kg per mole)

R = Molar gas constant = 8.314 J/mol/K

T = temperature (in kelvin)

\(v_{arg }\) = \(\sqrt{3RT_{arg}/M }\)

\(v_{arg} ^{2}\) = \(3RT_{arg} /M\)

1.20 ×1.20 ×\(10^{6\\\) = 3 ×8.314×\(T_{arg}\) /39.95 ×\(10^{-3}\)

\(T_{arg}\) = 1.44 × 39.95 ×\(10^{3}\) / 24.942

\(T_{arg}\) = 2306.47 K

Now,

RMS velocity is directly proportional to \(\sqrt{T}\) and inversely proportional to \(\sqrt{M}\)

\(v_{rms}\) \(\alpha\) \(\sqrt{T}\)   and  \(v_{rms} \frac{1}{\alpha } \sqrt{M}\)

\(\frac{v_{ne} }{v_{ar} }\) =  \(\sqrt{\frac{T_{ne} }{T_{ar} } }\)× \(\sqrt{\frac{M_{ar} }{M_{ne} } }\)

According to equation 1

\(\sqrt{\frac{T_{ne} }{T_{ar} } }\) × \(\sqrt{\frac{M_{ar} }{M_{ne} } }\) = 1.39

\(T_{ne}\) = 1.39 ×1.39 × 2306.47 × 20.18 / 39.95

\(T_{ne}\) = 2251.03K

Change in temp ΔT = 2306.47-2251.03= 55.44 K

Hence, 55.44 K is the temperature that need to change in order for the neon gas to be 39.0% faster than the RMS speed of the argon.

Learn more about Root-mean-square velocity here https://brainly.com/question/25806742

#SPJ4

Answer: an iceberg

Explanation: the reason for this is because it has much more mass then a hot cup of coffee even the the temputure of coffee is much warmer

In a sample of ground beef, there were 18.9% protein and 21.4% fat, both expressed in mass. Therefore, 125g of ground beef has 147.5 kilocalories.

The now-defunct kinetic theory of heat served as the basis for the calorie, a unit of energy. For historical reasons, the term "calorie" has two main definitions that are often employed.

Originally, the amount of heat needed to raise the temperature of one kg of water by one degree Celsius was referred to as a large calorie, dinner calorie, dietary nutrient, and kilo calorie (or one kelvin). A minuscule calorie or tiny calorie is the term used to describe the quantity of heat needed to produce the same increase in one kilogram of water.

The needed number of calories for ground beef is m.

protein in it = .18m

fat in it =  .21m

1 gram of protein gives 4 cals .

1 gram of fat gives 9 cals .

4 x .18m  + 9 x  .21m = 350

m = 147.5kilocalories

Therefore, 125g of ground beef has 147.5 kilocalories.

To know more about calories visit:

https://brainly.com/question/30595518

#SPJ4

The probability that the batch actually has a chemical defect is 16%. Therefore, option (a) 16% is the correct answer.

To solve this problem, we can use Bayes' theorem. Let's denote the following events:

A: The batch has a chemical defect.

B: The test result is positive for the defect.

We want to find the probability of event A given event B, denoted as P(A|B).

According to the problem statement, we have the following probabilities:

P(A) = 0.02 (2% of the batches have the defect)

P(B|A) = 0.9 (90% of the tests detect the defect, true positive rate)

P(not A) = 1 - P(A) = 0.98 (98% of the batches do not have the defect)

P(B|not A) = 0.096 (9.6% of the tests are false positives, false positive rate)

Now, let's calculate P(A|B) using Bayes' theorem:

P(A|B) = (P(B|A) * P(A)) / (P(B|A) * P(A) + P(B|not A) * P(not A))

P(A|B) = (0.9 * 0.02) / (0.9 * 0.02 + 0.096 * 0.98)

      = 0.018 / (0.018 + 0.09408)

      ≈ 0.018 / 0.11208

      ≈ 0.1606

Therefore, the odds that the batch actually has the chemical defect, given a positive defect result, is approximately 16.06%. Rounding this to the nearest percent, we get the option (a) 16%.

Learn more about probability at https://brainly.com/question/13604758

#SPJ11

The option that shows a physical change would be a cube of aluminum metal being flattened to create aluminum foil. Option C.

In chemistry, physical changes refer to reactions that only alter the physical properties of substances and not their chemical properties.

It is opposed to chemical changes which are changes that alter the chemical properties of substances, often along with their physical properties.

The changes to the color of a liquid when another liquid is added is a chemical change because the original color may not be recoverable.

The combination of two clear liquids resulting in a cloudy solution is a chemical change. So also is the combination of two clear liquids resulting in the beaker becoming hot.

The only physical change is the flattening of an aluminum cube to create aluminum foil. The chemical properties of the aluminum remain intact.

More on physical changes can be found here: https://brainly.com/question/17931044

#SPJ1

The lattice energy of ionic solid MX is -1008.37 kJ/mol.

The lattice energy of ionic solid MX can be calculated using the Born-Haber cycle, which involves several thermodynamic steps.

Step 1: Formation of MX from M and X₂ in the gas phase

M(s) + 1/2 X2(g) → MX(s)

The enthalpy change for this step is the standard enthalpy of formation of MX, ΔHf°.

ΔHf° = -463 kJ/mol

Step 2: Sublimation of M

M(s) → M(g)

The enthalpy change for this step is the sublimation energy of M, ΔHsub.

ΔHsub = 86 kJ/mol

Step 3: Dissociation of X₂

X₂(g) → 2X(g)

The enthalpy change for this step is the bond energy of X₂, which is given as 118 kJ/mol. However, since we need the enthalpy change for dissociation of one mole of X₂, we divide the given value by 2.

ΔHdiss = 1/2 × 118 kJ/mol = 59 kJ/mol

Step 4: Ionization of M

M(g) → M+(g) + e-

The enthalpy change for this step is the ionization energy of M, ΔHi.

ΔHi = 398 kJ/mol

Step 5: Electron affinity of X

X(g) + e- → X-(g)

The enthalpy change for this step is the electron affinity of X, ΔHea. However, the given value is for the formation of one mole of X-. Since we need the enthalpy change for the formation of one X- ion, we divide the given value by Avogadro's number.

ΔHea = -339 kJ/mol ÷ 6.022 × 10²³ mol⁻² = -5.63 × 10⁻¹⁹ kJ/ion

Using the Born-Haber cycle, we can write the following equation:

ΔHf° = ΔHsub + ΔHdiss + ΔHi + ΔHea + U

where U is the lattice energy of MX. Solving for U, we get:

U = ΔHf° - ΔHsub - ΔHdiss - ΔHi - ΔHea

U = (-463 kJ/mol) - (86 kJ/mol) - (59 kJ/mol) - (398 kJ/mol) - (-5.63 × 10⁻¹⁹ kJ/ion)

U = -1008.37 kJ/mol

Therefore, the lattice energy of ionic solid MX is -1008.37 kJ/mol.

The lattice energy of ionic solid MX can be calculated using the Born-Haber cycle, which involves several thermodynamic steps. In this case, the lattice energy is found to be -1008.37 kJ/mol.

To know more about Born-Haber cycle, visit:

https://brainly.com/question/31670522

#SPJ11

Answer: 1.50 J

Explanation:

Answer:

1.5 joules

Explanation:

Due to conservation of energy, half way the potential energy will be 1.5J so the remaining 1.5J is kinetic energy.

Answer:

H2O is a covalent compound because of the oxygen and hydrogen, and because they share electrons to sustain stability. Hope this helps :)

I don't know I am having the same problem

Answer:

C2H6 OR C6H12O6 THE ANSWER

Explanation:

C2H6

!!!!!!!!!!

because it has both hydrogen and carbon as given in the word "Hydro-carbon"

Answer:

0.985

Explanation:

moles= mass/Mr

Mr is the molecular mass

Cu=63.5

F2=38

Mr=63.5+38=101.5

moles=100/101.5=0.985

round answer if needed

The correct answer is $55,000. (Option A)

Based on the given information, the pretax net income for the firm selling 25,000 units of its product at $11 per unit and incurring variable costs of $6 per unit with total fixed costs of $70,000 can be calculated as follows:

Total Revenue = 25,000 units * $11 per unit = $275,000
Total Variable Costs = 25,000 units * $6 per unit = $150,000
Total Fixed Costs = $70,000

Pretax Net Income = Total Revenue - Total Variable Costs - Total Fixed Costs
Pretax Net Income = $275,000 - $150,000 - $70,000 = $55,000
Learn more about pretax net income at: https://brainly.com/question/15330628
#SPJ11

The mass percent of NaHCO₃ in an Alka Seltzer tablet is approximately 32.15%.

To calculate the mass percent of NaHCO₃ in an Alka Seltzer tablet, we need to know the mass of NaHCO₃ and the mass of the entire Alka Seltzer tablet. Let's assume that the mass of an Alka Seltzer tablet is 3.40 g, and that it contains 1.00 g of NaHCO₃.

Using the formula for mass percent, we can calculate:

mass percent = (mass of NaHCO₃ / mass of Alka Seltzer) x 100

mass percent = (1.00 g / 3.40 g) x 100

mass percent = 29.41%

Therefore, the mass percent of NaHCO3 in an Alka Seltzer tablet is approximately 29.41%. However, this calculation assumes that the only ingredient in the tablet is NaHCO₃, which is not true. In reality, Alka Seltzer tablets contain other ingredients as well, so the actual mass percent of NaHCO₃ in a tablet may differ from this calculated value.

To know more about mass percent, refer here:

https://brainly.com/question/30400742#

#SPJ11

299.7 moles of electrons are required to produce 99. 9 g of aluminum metal from a sample of molten aluminum fluoride.

Calculation,

The production of aluminium metal is given as,

\(Al^{+3} + 3e^{-}\)→ \(Al\)

The 3 moles of electrons require to produce 1 gm of atom of aluminium ( weight = 27 ) solution fluoride.

The number of moles of electrons are required to produce 99. 9 g of aluminum metal from a sample of molten aluminum fluoride = 3mol×99.9g/1g

The number of moles of electrons are required to produce 99. 9 g of aluminum metal from a sample of molten aluminum fluoride = 299.7 moles

To learn about more aluminum fluoride

https://brainly.com/question/11856173

#SPJ4

The organic compounds is the main source of energy in living organisms is Lipids and Carbohydrates.

There are numerous biomolecules that live in nature. Food is veritably essential for life processes and that food should be nutritional as well. There are five factors of foods Carbohydrates, proteins, fats, vitamins, and minerals. These are veritably essential for the mortal body and insufficiency of any of the factors may lead to serious illness.

The organic composites which are the main source of energy in any living being are lipids and carbohydrates. Carbohydrates are nutrients that are used constantly and get converted into energy. Carbohydrates are used as short- term energy storehouse while lipids are used as long- term energy storehouse.

Lipids contain further energy per gram than carbohydrates, so that's why they're used for long- term storehouse.

Learn more about Energy sources:

https://brainly.com/question/712382

#SPJ4

To calculate the mass of KNO3 created during the reaction, first compute the moles of KNO3 formed. Because the reaction involves a 1:2 mole ratio of K2CrO4 to KNO3, the moles of KNO3 formed can be calculated by multiplying the moles of K2CrO4 by 2.

As a result, 0.040 mol K2CrO4 x 2 = 0.080 mol KNO3. We can determine the mass of KNO3 created now that we know the moles of KNO3 formed by multiplying the moles of KNO3 by its molar mass. Thus, 0.080 mol KNO3 multiplied by 101.11 g/mol equals 8.089 g KNO3.

When 100.mL of 0.40 M potassium chromate solution is introduced to excess silver nitrate, the reaction can produce 8.089 g of KNO3.

Learn more about molar mass at:

https://brainly.com/question/12127540

#SPJ1

Answer:

Compare your two units. The two units must measure the same thing.

For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.

or

Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.

For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.

Explanation:

Hope this will help

please make my answer as brainelist

Explanation:

Avogadro's number. What can be said about 1 mol Ag and 1 mol Au? ... They contain the same number of atoms.

1 mole of Ag and 1 mole of Au contain the same number of particle. Therefore, option B is correct.

The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022140761023 elementary entities.

A mole is defined as the mass of a substance that has the same number of elementary particles as there are atoms in precisely 12.000 g of 12C.

In the periodic chart, group 11 includes the chemical elements roentgenium (Rg), copper (Cu), silver (Ag), and gold (Au). However, no chemical tests have yet been done to demonstrate that roentgenium behaves similarly to the heavier homologue of gold.

Thus, option B is correct.

To learn more about mole, follow the link;

https://brainly.com/question/26416088

#SPJ2