Which statement accurately describes how electrical power and current are related

Answer:

yes

Explanation:

While galvanic corrosion is driven by the difference in corrosion potential between two metals, the electrolytic corrosion is driven by the external sources of EMF.

The number of gold atom : 1.204 x 10²¹

Given

0.6 g of 18 carat gold

mass number of gold = 197

24 carat as 100% gold

Required

The number of gold atom

Solution

Percentage of gold in 18 carat :

\(\tt \dfrac{18}{24}\times 100\%=75\%\)

Mass of gold in 0.6 g of 18 carat :

\(\tt 75\%\times 0.6~g=0.45~g\)

mol :

\(\tt mol=\dfrac{mass}{MW}=\dfrac{0.45}{197}=0.0023\)

A mole is a number of particles(atoms, molecules, ions)  in a substance

1 mole = 6.02.10²³ particles  

So the number of gold atom :

\(\tt 0.0023\times 6.02\times 10^{23}=1.204\times 10^{21}\)

Answer:

1)In organic chemistry, the bromine test is a qualitative test for the presence of unsaturation (carbon-to-carbon double or triple bonds), phenols and anilines. ... The more unsaturated an unknown is, the more bromine it reacts with, and the less coloured the solution will appear.

2)The equation for incomplete combustion of propane is: 2 C3H8 + 9 O2 → 4 CO2 + 2 CO + 8 H2O + Heat. If not enough oxygen is present for complete combustion, incomplete combustion occurs. The result of incomplete combustion is, once again, water vapour, carbon dioxide and heat. But it also produces carbon monoxide.

Explanation:

3)Propene, also known as propylene, is an unsaturated organic compound with the chemical formula {\displaystyle {\ce {CH3CH=CH2}}}. It has one double bond, and is the second simplest member of the alkene class of hydrocarbons. It is a colorless gas with a faint petroleum-like odor. 

Formula: C3H6

IUPAC ID: Propene

4)Margarines are chemically created during hydrogenation which, until January 1, 2006, relied upon trans fats to solidify their vegetable oils. Food companies have been exploring options for replacing trans fat in partially hydrogenated margarine.

Answer:

I think 2

Explanation:

Answer:

365 mL

Explanation:

There are 1,000 mL per every 1 L. As such, to convert between the two measurements, you need to multiply the given volume (0.365 L) by the conversion. To allow for the cancellation of units (liters), liters should be in the denominator of the conversion.

1,000 mL = 1 L

 0.365 L            1,000 mL
----------------  x  -----------------  = 365 mL
                               1 L

The molecular formula of the unknown compound is determined as  C₉H₁₁NO₂.

The molecular formula is calculated as follows;

CHNO  +  O₂ ------------> CO₂  + H₂O

Mass of carbon, C:  = (6.64 x 12)/44 = 1.81 g in 2.77 g sample

Mass of hydrogen, H: = (1.67 x 2)/18 = 0.186 g in 2.77 g sample

Mass of Nitrogen, N: = (2.77 x 0.143)/1.69 = 0.234 g

Mass of oxygen, O:  = 2.77 g - 1.81 g - 0.186 g - 0.234 g = 0.54 g

C = 1.81 g = 0.15 mol

H = 0.186 g = 0.186 mol

N = 0.234 g = 0.017 mol

O = 0.54 g = 0.0337 mol

divide through with the smallest number of moles (0.017 mol);

C = 9

H = 11

N = 1

O = 2

Molecular formula = C₉H₁₁NO₂

Check the molar mass of the compound = (9 x 12) + (11 x 1) + (14) + (2 x 16) = 165 g/mol

Thus, the molecular formula of the unknown compound is determined as  C₉H₁₁NO₂.

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The element between Krypton and Argon as decribed is; Niobium (Nb).

An element which is +1/2, +1/2, +1/2 in the p area when looking at it's orbital configuration can be described as follows;

The element is therefore am element with valency 5 between Krypton and Argon.

The element in discuss is Niobium (Nb).

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For a normal boiling point of a liquid is 282 °C, the temperature is mathematically given as

T2=181.55°C\

Generally, the equation for the gas  is mathematically given as

ln(p1/p2)=dHvap/R(1/T2-1/T1)

Therefore

ln(1/0.26)=23500/8.214(1/T2-1/555)

T2=181.55^C

In conclusion

T2=181.55°C

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All the balanced chemical equations obey the law of conservation of mass. The numbers which are used to balance the chemical equation are called the coefficients. So here the mass of zinc is 55 g.

According to the law of conservation of mass, the mass can neither be created nor be destroyed but it can be converted from one form to another. The reactants appear on the left hand side and the products appear on the right hand side.

The amount of products is equal to the amount of reactants according to the law of conservation of mass.

25 + 125 = 95 + Zn

Zn = 55 g

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Answer:

If I were an element, I would want to be Carbon. I would want to combine with  oxygen. It would create carbon dioxide. It has daily life uses. For heat, and for refridgment and more.

Explanation:

Hello!

Answer:

32.8 °C

Hope this helps :)

Answer:

thermal energy

Explanation:

Thermal conduction is the diffusion of thermal energy (heat) within one material or between materials in contact. The higher temperature object has molecules with more kinetic energy; collisions between molecules distributions this kinetic energy until an object has the same thermal energy throughout.

Answer:

energy is transferred when one molecule collides with another.

Explanation:

aP33x

0.766 mL volume of formic acid is needed to prepare the buffer.

What is volume of formic acid?

To calculate the amount of formic acid needed to prepare the buffer, we can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

where pH is the desired pH of the buffer, pKa is the acid dissociation constant of the weak acid, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid.

First, we can rearrange the Henderson-Hasselbalch equation to solve for the ratio of [A-]/[HA]:

[A-]/[HA] = \(10^{(pH - pKa)}\)

[A-]/[HA] = \(10^{(4.75 - 3.74)}\)

[A-]/[HA] = 3.52

Next, we can use the fact that the sum of the concentrations of [A-] and [HA] must be equal to the total volume of the buffer solution times the total concentration of the buffer components:

[A-] + [HA] = (0.0500 L)(0.600 M + 0.3000 M)

[A-] + [HA] = 0.0450 mol

We can also express [A-] in terms of [HA] using the ratio we calculated above:

[A-] = 3.52[HA]

Substituting this into the previous equation, we get:

3.52[HA] + [HA] = 0.0450 mol

4.52[HA] = 0.0450 mol

[HA] = 0.00994 mol

Finally, we can use the molar mass of formic acid (46.03 g/mol) to calculate the volume of formic acid needed to prepare the buffer:

volume of formic acid = (0.00994 mol)(46.03 g/mol) / (0.600 mol/L)

volume of formic acid = 0.766 mL

Therefore, 0.766 mL of formic acid is needed to prepare the buffer.

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The mass percentage is an important method which is used to calculate the concentration of a solution. The amount of water needed to add in order to make 17.85 % NaCl solution is 230.1 g.

The mass percentage of a component in a solution is defined as the mass in grams of that component present per 100 g of the solution. The term mass percentage is denoted as w/w. It is used to calculate the concentration of a binary solution.

Mass percentage = Mass of the component in the solution / Total mass of solution × 100

17.85 = 50.0 / 50.0 + x × 100

0.1785 (50.0 + x) = 50.0

8.925 + 0.1785 x = 50.0

0.1785 x = 41.075

x = 230.1 g

Thus the amount of water added to make the solution is 230.1 g.

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The reaction rate increases by increasing the temperature of the reaction system , increasing the concentration of a reactant in solution and increasing the surface area of a solid reactant.

In the reaction of calcium with 1 M hydrochloric acid, The factor which  will increase the reaction rate is by increasing the temperature of the reaction system. When the temperature of the reaction increases , the molecules kinetic energy of the molecules increases more than the activation energy and it will increases the rate of reaction.

The activation energy of the reaction decreases and therefore the rate of the reaction increases. The reaction rate increases by increasing the concentration of the reactant in the solution and increasing the surface area of the solid reactant.

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Ok, so

First of all, let's remember what a mole is:

A mole can be described as the molecular mass of a compound or the mass of an element.

For example:

The molar mass of Zn is 65.38g. So, 1 mole of Zn equals to 65.38g of Zn. We can find the value of molar mass in the periodic table.

Now, we want to find the number of moles that are contained within 18.6g Zn.

For this, we could use the fact that:

In this case, our given mass is 18.6g of Zn, and, the molar mass of Zn is 65.38g/mole. Then, if we replace:

Therefore, there are 0.284 moles of Zn in 18.6g of Zn.

Answer:

51.14%

Explanation:

The following data were obtained from the question:

Mass of hydrated salt = 7.212 g

Mass of anhydrous salt = 3.524 g

Percentage mass of water =..?

Next, we shall determine the mass of the water in the hydrated salt. This can be obtained as follow:

Mass of hydrated salt = 7.212 g

Mass of anhydrous salt = 3.524 g

Mass of water =.?

Mass of water = (Mass of hydrated salt) – (Mass of anhydrous salt)

Mass of water = 7.212 – 3.524

Mass of water = 3.688 g

Finally, we shall determine the percentage mass of water in the hydrated salt as follow:

Percentage of water

= mass of water /mass of hydrated salt × 100

Percentage of water = 3.688/7.212 × 100

Percentage of water = 368.8/7.212

Percentage of water = 51.14%

Therefore, the percentage of water in the hydrated salt is 51.14%

A neutral atom of on element has two electrons with n=1, eight electrons with n=2, eight electrons with n=3 and one electron with n =4 and has mass number of 39 then the atomic number of element is 39 and number of neutron in the nucleus is 50 and total number of s electron is 2 and total number of p electron is 8 and the group is 3rd group

Yttrium is a metallic element with atomic number 39 usually included in the rare earth group that occur usually with other rare earth element in minerals and is used especially in phosphorous and YAG laser and alloy etc and element with mass number of 39 is yttrium and the atomic number of element is 39 and number of neutron in the nucleus is 50 and total number of s electron is 2 and total number of p electron is 8 and the group is 3rd group

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The given statement is true. A skeleton equation shows the formulas of the compounds participating in a chemical reaction and their states of matter but not the ratio in which they react.

A skeleton equation defines the chemical formulas and physical states of the reactants and products, yet it does not account for the relative amounts of the reactants and products. Chemical reactions result simply from the rearrangement of atoms, thus the law of conservation of mass have to be observed.

Skeleton Equations are the equations where there is only chemical formula of reactants and products but no state mentioned and no balancing of atoms on either side of the equation done. For example: Mg + O2 → MgO, it is a skeleton equation. In the equation, the only thing mentioned is the chemical formula of reactant.

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Answer:

D

acid+base-----> salt + water

The empirical formula of the given compound is \(CaO\).

A chemical compound's empirical formula in chemistry is the simplest whole number ratio of atoms within a molecule.

Given:

Mass of Ca = 2.514g

Mass of O = 1.004g

Molar mass of Ca = 40.078g/mol

Molar mass of O = 15.999g/mol

To find:

Empirical formula = ?

Formula:

Empirical formula = Moles of Ca : Moles of O

Calculations:

No. of moles of Ca = 2.514 / 40.078

n of Ca = 0.06273 moles

No. of moles of O = 1.004 / 15.999

n of O = 0.06275 moles

Divide both by the lowest no. of moles

n of Ca : n of O = 1 : 1

Empirical formula = \(CaO\)

Result:

\(CaO\) is the empirical formula of the compound.

The complete question is:

In an experiment, a 2.514 g sample of calcium was heated in a pure stream of oxygen, and was found to increase in mass by 1.004 g. Calculate the empirical formula for the given compound.

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Answer:Ok den...

Explanation:

Nope

The solubility of BaF₂ is 0.18 g/L

Solubility is defined as the maximum quantity of a substance that can be dissolved in another. It is the maximum amount of solute that can be dissolved in a solvent at equilibrium, which produces a saturated solution

The solubility product constant, Ksp​, is the equilibrium constant for a solid substance dissolving in an aqueous solution.

It represents the level at which a solute dissolves in solution.

The more soluble a substance is, the higher the Ksp  value it has.

Given,

Ksp for barium fluoride = 2.4 × 10⁻³

We know that, Barium Flouride dissociates as -

                                          BaF₂ ⇒ Ba²⁺ + 2F⁻

Let the solubility be s = [ Ba²⁺] = [F⁻]

Thus, Ksp = [Ba²⁺] [2F⁻]²

                  = s × 4s² = 4s³

Substituting the values, we get

                     2.4 × 10⁻³ = 4s³

                  s³ = 2.4 × 10⁻³ ÷ 4

                      s³ = 6 × 10⁻³

                    s = ∛ 6 × 10⁻³

                     s = 0.18 g/L

Therefore, the solubility of BaF₂ is 0.18 g/L

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Answer:

Explanation:

To calculate the molarity of the solution, we first need to determine the mass of calcium chloride (CaCl2) in 100 g of the solution.

If the solution is 22.3% calcium chloride by mass, this means that there are 22.3 g of CaCl2 in 100 g of the solution.

We can use the density of the solution to convert 100 g of the solution to its volume:

volume of 100 g of the solution = mass of the solution / density of the solution

volume of 100 g of the solution = 100 g / 1.20 g/mL = 83.3 mL

Now, we can calculate the molarity of the solution using the following formula:

molarity = moles of solute / volume of solution (in L)

The molar mass of CaCl2 is 40.08 + 2(35.45) = 110.98 g/mol. Therefore, the number of moles of CaCl2 in 22.3 g of the solution is:

moles of CaCl2 = 22.3 g / 110.98 g/mol = 0.2008 mol

The volume of the solution containing 22.3 g of CaCl2 is:

volume of solution = 83.3 mL / 1000 mL/L = 0.0833 L

Substituting these values into the formula for molarity, we get:

molarity = 0.2008 mol / 0.0833 L = 2.41 M

Therefore, the molarity of the aqueous solution that is 22.3% by mass calcium chloride is 2.41 M.

Answer:

Explanation:

Therefore, the pH of the HCl solution is 5.

A chemist determines that a substance is composed of 30.4% nitrogen by mass and 69.6% oxygen by mass. The molar mass of the compound is 230.5 g/mol, the molecular formula is NO₂.

We must compute the empirical formula in order to ascertain the compound's chemical composition.

If we have 100 grams of the compound.

This suggests we have:

30.4 g of nitrogen

69.6 g of oxygen

Now, we have to convert the mass of each element to moles.

The molar mass of nitrogen (N) = 14.01 g/mol

the molar mass of oxygen (O)  =  16.00 g/mol.

Number of moles of nitrogen (N):

2.17 mol

Number of moles of oxygen (O):

4.35 mol

The simplest whole-number ratio between the moles of nitrogen and oxygen must now be determined. To calculate the ratio, we divide both numbers by the smaller value.

Moles N / moles O = 2.17 mol / 2.17 mol = 1.00

Moles O / moles O = 4.35 mol / 2.17 mol = 2.00

The ratio is approximately N₁O₂.

We divide the subscripts by their greatest common divisor to obtain the simplest ratio, since we are looking for the empirical formula. The empirical formula is NO₂ since the greatest common divisor in this situation is 1.

The molecular formula of the compound is NO₂.

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Answer:

yes

Explanation:

Yes, size of molecule has greatly affected the gas law.

The gas laws affected depending on whether we use heavy gas particles or light gas particles because the heavy gas particles can't move faster as light gas particles with the increase of temperature.

If the temperature is increased, the gas particles move faster due to absorb of heat energy so they hit the walls of the container. This causes the pressure to rise. The pressure of a gas also increases when the volume of container in which it is placed is decreased. Bigger the molecule size, the stronger the intermolecular forces, so the molecule has higher melting and boiling points so we can conclude that big size molecule greatly affected the gas law.

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Answer:

methane

Explanation: methane is obtained from the decaying of flora and fauna mostlyunder damp