The density of gold is 19.3 grams per cubic centimeter. What is the mass of a bar of gold that measures 15.24 cm in length, 10.16 cm in width, and 5.08 cm in height?

Answer: Physical and then chemical

Explanation: Cast iron is porous, meaning that long exposure to water can cause it to soak up the moisture and eventually rust.

Answer:

How do one confess feelings to her if he is introvert?

Answer:

Proton: A positively charged particle found in the nucleus of an atom. A proton contributes one atomic mass unit to the total atomic weight of an atom.

Explanation:

Answer:

A proton

Explanation:

A proton is a positive charge found in an atom

The mixtures would result in the pk, of the acid being obtained from a direct pH measurement of the resulting solution is  25 cm³ 0.1 mol dm⁻³HCl and 25 cm³ 0.1 mol dm⁻³ NaCl. Therefore, option A is correct.

The pH scale, which previously stood for "potential of hydrogen," is used to describe how acidic or basic an aqueous solution is. The pH values of acidic solutions are lower than those of basic or alkaline solutions.

The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. In reality, pH is a measurement of the proportion of free hydrogen and hydroxyl ions in water.

A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.

Thus, option A is correct.

To learn more about pH, follow the link;

https://brainly.com/question/15289741

#SPJ1

8.80 is the total mass, in grams, of carbon dioxide when 2.20 grams of propane is burned in excess oxygen.

The sum of an object's mass is determined by the type, weight, and number of atoms in that object. The unit of measurement for mass is the kilogram, or kg. There are several methods for calculating the mass in physics.

The molecular weight of propane (C3H8) is 44.096 g/mol. For each unit of propane burned when there is too much oxygen present, one mole of carbon dioxide (CO2) is produced. Since carbon dioxide has a molecular weight of 44.01 g/mol, the mass of carbon dioxide created is equal to the mass of propane burned. 2.20 g of propane could end up in 8.80 g of carbon dioxide within this scenario (2.20 g x 44.01 g/mol = 8.80 g).

Learn more about total mass, here:

https://brainly.com/question/15582690

#SPJ4

10g is the mass (in grams) of KCl needed to prepare 200.0 mL of a 5.000% (m/v) solution of KCl in water.

A body's mass is an inherent quality. Prior to the discoveries of the atom or particle physics, it was widely considered to be tied to the amount of matter within a physical body.

It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses. There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent.

mass/volume×100 = 5.000

mass/ 200.0×100 = 5.000

mass =5.000×200.0/100

          = 10g

To know more about mass, here:

https://brainly.com/question/19694949

#SPJ1

Answer: The percentage of the (R)-limonene in the sample is 67.24%.

The percentage of the (R)-limonene in a sample of limonene with a specific rotation of -38 can be calculated using the following equation:

Percentage (R)-limonene = (Specific rotation of sample - Specific rotation of (S)-limonene) ÷ (Specific rotation of (S)-limonene) x 100%

In this case, the equation is:

Percentage (R)-limonene = (-38 - (-116)) ÷ (-116) x 100% = 67.24%

Therefore, the percentage of the (R)-limonene in the sample is 67.24%.

Learn more about enantiomer here:

https://brainly.com/question/30845514#

#SPJ11

The managing underwriter will retain $1,250,000 in fees if the entire offering is sold.

The company is offering 5,000,000 new shares to the public at $13 per share. These shares are being sold to a syndicate for $12 per share, with the underwriters receiving $0.75 per share sold and the selling group receiving $0.30 per share sold. The managing underwriter retains $0.25 per share sold by anybody. The selling group is responsible for selling 1,000,000 out of the 5,000,000 shares offered. To calculate the managing underwriter's fees, we need to first determine the total number of shares sold. If the entire offering is sold, 5,000,000 shares will be sold. The total compensation to the underwriters is $0.75 per share, which amounts to $3,750,000 for the entire offering. The selling group will receive $0.30 per share sold, which amounts to $300,000 for the 1,000,000 shares they are responsible for selling. Therefore, the managing underwriter will retain $1,250,000 in fees ($0.25 per share sold multiplied by 5,000,000 shares sold).

Know more about share here:

https://brainly.com/question/30324507

#SPJ11

must be dead and must be brokin down in the exacto form It must be

Answer:

a

Explanation:

Answer:

Gain 3 electrons.

Explanation:

If element X have 5 valence electrons it will more than likely gain 3 electrons to fill its octet to become stable. Gaining the 3 electrons is much easier for the atom than if it were to give away it's 5 valence electrons. Elements with 5 valence electrons that could represent element X are:

Answer:

true

Explanation:

ionic transfer of e^- ions formed (charges)

ionic=non-metal+ metal

ex: F+Ca

covalent sharing e^- no true charges

covalent= non-metal+ non-metal

ex: F+P

( my notes)

Answer: Thus 9.75 moles of iron will be required.

Explanation:

The balanced chemical reaction is:

\(2Fe+3O_2\rightarrow 2Fe_2O_3\)  

According to stoichiometry :

2 moles of \(Fe_2O_3\) are produced by= 2 moles of \(Fe\)

Thus 9.75 moles of \(Fe_2O_3\) are produced by=\(\frac{2}{2}\times 9.75=9.75moles\)  of \(Fe\)

Thus 9.75 moles of iron will be required.

The social process that Nicky used is social referencing. This is when an individual looks to others, in this case, Nicky's mother, for guidance on how to react in a new or uncertain situation.

The social process that Nicky used in the given scenario is social referencing. Social referencing is a psychological term that refers to the act of seeking emotional cues or guidance from others in ambiguous or uncertain situations. It typically occurs when an individual is faced with a new experience or environment and looks to a trusted person, such as a parent or caregiver, to understand how to react or interpret the situation.

In the example you provided, Nicky is observing their mother's facial expression and body language to gauge how they should respond to the clown. By seeking cues from their mother, Nicky is using social referencing to determine whether the clown is safe or potentially threatening. This process allows individuals, especially children, to rely on the social and emotional information provided by others to navigate unfamiliar or potentially challenging situations.

The social process that Nicky used is social referencing. This is when an individual looks to others, in this case, Nicky's mother, for guidance on how to react in a new or uncertain situation. By observing his mother's facial expression, Nicky was able to determine that the stairs may be dangerous and stopped in a safe manner. This is an important developmental milestone for infants and toddlers as they learn to navigate and understand their environment.

To know more about environment visit:

https://brainly.com/question/13699919

#SPJ11

Answer: The second reaction took place at a higher temperature

Explanation:

Rate is affected by temperature, as higher temperatures cause the reacting molecules to have more energy.

Collision theory states that in order for a reaction to occur, each reacting molecule must collide with one another in the correct orientation and with enough energy, called the activation energy.

A higher energy caused by a higher temperature will cause the molecules to collide much more frequently, leading to a higher chance of a successful collision, and with more energy to satisfy the activation energy.

Therefore, the second reaction must have taken place at a higher temperature, since the molecules had more energy than the first reaction leading to a higher rate of reaction, and a higher rate constant.

Hope this helps!

The molar concentration of the NaOH solution is 0.883 M.

The balanced equation for the reaction is:

H₂C₂O₄·2H₂O + 2 NaOH → Na₂C₂O₄ + 4 H₂O

From the equation, we can see that 2 moles of NaOH are required to neutralize 1 mole of H₂C₂O₄·2H₂O.

First, we need to calculate the number of moles of H₂C₂O₄·2H₂O used:

moles of H₂C₂O₄·2H₂O = (mass of H₂C₂O₄·2H₂O)/(molar mass of H₂C₂O₄·2H₂O)
moles of H₂C₂O₄·2H₂O = (2.3688 g)/(126.07 g/mol)
moles of H₂C₂O₄·2H₂O = 0.0188 mol

Since 2 moles of NaOH are required to neutralize 1 mole of H₂C₂O₄·2H₂O, the number of moles of NaOH used is:

moles of NaOH = 2 x moles of H₂C₂O₄·2H₂O
moles of NaOH = 2 x 0.0188 mol
moles of NaOH = 0.0376 mol

Finally, we can calculate the molar concentration of the NaOH solution:

molar concentration of NaOH = (moles of NaOH)/(volume of NaOH solution in liters)
molar concentration of NaOH = (0.0376 mol)/(0.04256 L)
molar concentration of NaOH = 0.883 M

Learn more about molar concentration here: https://brainly.com/question/26255204

#SPJ11

Since ΔG° = -RT ln(K), we can derive the expression for K at a given temperature by plugging in ΔG° for the reaction.

We will assume that the value for ΔG° is provided in kJ. The negative sign preceding the value indicates that the reaction is exothermic and spontaneous in the forward direction.

ΔG° = -29.4 kJ
R = 8.314 J/mol·K (universal gas constant)
T = 298 K
Converting the units of ΔG° into joules.

ΔG° = -29,400 J/mol
Thus, we have
ΔG° = -RT ln(K)

Rearranging the above equation, we get
ln(K) = -(ΔG°)/(RT)
ln(K) = -(-29,400)/(8.314 × 298)
ln(K) = 12.62
Taking the exponential of both sides of the equation to solve for K:

K = e12.62
K =  5.16 × 1012
The value of the equilibrium constant (Keq) at a given temperature can be calculated using Gibbs free energy (ΔG°). For exothermic reactions, the value of ΔG° is negative, and for endothermic reactions, the value of ΔG° is positive. The value of Keq determines whether a reaction proceeds more in the forward direction or in the reverse direction. If the value of Keq is greater than one, the reaction is said to proceed in the forward direction. If the value of Keq is less than one, the reaction is said to proceed in the reverse direction. If the value of Keq is equal to one, the reaction is said to be at equilibrium. When the reactants and products are in the equilibrium state, the reaction proceeds in both directions at the same rate, and the value of Keq remains constant.
The value of the equilibrium constant (Keq) for a given chemical reaction at 298 K can be calculated using Gibbs free energy (ΔG°). The value of Keq determines the direction in which the reaction proceeds. If Keq is greater than one, the reaction proceeds in the forward direction, if Keq is less than one, the reaction proceeds in the reverse direction, and if Keq is equal to one, the reaction is at equilibrium. For the given chemical reaction with a ΔG° of -29.4 kJ, the value of Keq is calculated to be 5.16 × 1012 at 298 K.

To know more about temperature visit:

brainly.com/question/7510619

#SPJ11

Answer:

Fats are created by the ribsome to store excess energy

Answer:

I'm not sure but i think it's D

Amino acids are the building blocks for creating proteins.

The produced at the anode in the electrolysis of molten CuF2 is A. F₂.

During electrolysis, CuF₂ will separate into Cu₂⁺ cations and F⁻anions. Cu₂⁺ will be reduced to copper metal, which will deposit on the cathode, whereas F⁻ anions will be oxidized to fluorine gas on the anode in the electrolysis of molten CuF₂. Hence, the answer is option A. Fluorine gas (F₂) is generated at the anode in the electrolysis of molten CuF₂.

Therefore, during the electrolysis of molten CuF₂, Cu₂⁺ is reduced to copper metal, which deposits on the cathode, and F⁻ anions are oxidized to fluorine gas on the anode, which is produced at the anode. The chemical reactions taking place during electrolysis of CuF₂ are given below: At the cathode, Cu₂⁺ cations get reduced to copper metal. Cu₂⁺ + 2e⁻ ⟶ Cu. At the anode, F⁻ anions get oxidized to fluorine gas. 2F⁻ ⟶ F₂ + 2e⁻. Therefore, option A is correct.

Learn more about electrolysis at:

https://brainly.com/question/12994141

#SPJ11

1,1-hexene > 2,3,3-dimethyl-2-butene > 3-methyl-3-hexene > cis-3-hexene

The Saytzeff rule states that an alkene becomes more stable the more highly substituted it is. Since 2,3-dimethyl-2-butene is the most substituted alkene among the ones listed, it will thus be the most stable.

Ozone treatment of 2,3-dimethyl but-2-ene results in ozoinde, which with further reduction yields propanone and water. Trans-2-butene undergoes ozonolysis, producing the main ozonide. Acetaldehyde, syn- and anti-acetaldehyde oxide, and this main ozonide are the products of its breakdown.

Let's not forget that the alkenes' pi bonds are least stabilized by alkyl groups, making terminal alkenes the least stable of the group. This means that among the alkenes listed, 1-hexene is the least stable.

Learn more about 2,3-dimethyl-2-butene  here brainly.com/question/24146247

#SPJ4.

Answer:

1 atmospheric pressure = 760.0 mm Hg

Thus 580 mm Hg = (580 mm Hg/(760 mm Hg/atm))

= 0.763 atm

107 g of aluminum can be heated from 12.71 to 72.03 by 5,737.39 amount of energy.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                 Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Q = 5737.39 J

ΔT = ( 72.03 - 12.71) = 59.32 ⁰C

Q = mcΔT

5737.39 = m × 0.9 × 59.32

mass = 107.46g

Learn more about Specific heat, here:

https://brainly.com/question/11297584

#SPJ1

Answer:

3 KOH(aq) + H3PO4(aq) = K3PO4(aq) + 3 H2O

Explanation:

The moles of CO2 are in the tank is mathematically given as

n=1.431

Question Parameters:

A 10-liter tank of CO2 is at a pressure of 3.5 atm and a temperature of

25°C.

Generally, the equation for the ideal gas  is mathematically given as

PV=nRT

Therefore

n=PV/RT

n=354.638kpa*10/8.314 J/mol·K *298k

n=1.431

In conclusion,  moles of CO2 is in the tank is

n=1.431

Read more about Pressure

https://brainly.com/question/25688500

A 1.26 g sample of He gas has a pressure of 0.123 arm and a volume of 32.6 L, then the temperature of the gas is -117.7 degree C.

Temperature of any gas will be calculated by using the ideal gas equation as:

PV = nRT, where

P = pressure of gas = 0.123 atm

V = volume of gas = 32.6 L

R = universal gas constant = 0.082 L.atm / K.mol

T = temperature of gas = ?

n is moles of He gas and will be calculated as:

n = W/M, where

W = given mass = 1.26g

M = molar mass = 4 g/mol

n = 1.26 / 4 = 0.315 moles

On putting values we get,

T = (0.123)(32.6) / (0.315)(0.082)

T = 155.41 K = 155.41 - 273.15 = -117.7 degree C

Hence required temperature of the helium sample is -117.7 degree C.

To know more about ideal gas equation, visit the below link:

https://brainly.com/question/25290815

Answer:

Potassium (K)

Explanation:

Out of the four options, Potassium is the only one to fill a total of 4 energy levels.

Both Cesium (Cs) and Rubidium (Rb) fill more than three energy levels, with Cesium filling 6 and Rubidium filling 5.

Sodium (Na) only fills 3 energy levels.

Thus, that leaves Potassium (K), which has 4 energy levels.

Hope this helped ^-^

The statement "Cross interactions between components of a mixture are represented by the ideal mixture model." is False.

The ideal mixture model represents interactions between components of a mixture as zero. According to the ideal mixture model, the energy of a mixture of gases is determined entirely by the kinetic energy of the individual molecules in the mixture.

A binary solution is a mixture of two pure components. An ideal solution is one in which the behavior of each component is ideal, implying that the intermolecular forces between the different molecules are identical, as are the intermolecular forces between the like molecules. In this case, the interactions between the molecules in the solution would be identical to the interactions between the molecules in the pure liquids.

The model that represents cross interactions between components of a mixture is the non-ideal mixture model. Non-ideal mixtures are mixtures in which the intermolecular forces between the components vary from one component to the next.

Learn more about ideal mixture model at https://brainly.com/question/31005241

#SPJ11

Answer:

Square

Explanation:

A square is a quadrilateral with r sides the same length

Answer:

Radiation goes with the number 3

convection goes with 2

conduction goes with 1

Explanation: