The sheet of gold foil Rutherford used was 304 mm wide and 0.016 mm thick. What maximum length of gold foil could be made from 1.10 x 103 g of gold?

To balance the given equation remember to start by the elements that are different from oxygen and hydrogen, in this case, let's start by chlorine:

As chlorine in AlCl3 is 3 times and in CaCl2 is 2 times, we have to write a 2 in AlCl3 and a 3 in CaCl2, with this coefficients we will have 6 chlorines in total at each side of the equation.

Then, as we put that 2 in front of AlCl3, we will also have 2 aluminium. After the reaction we have only one aluminium, it means that we need to write 2 in front of Al to balance the number of aluminium in the equation.

The correct option is 2.

There are only two electrons that could posses the quantum numbers as shown.

We now that it is often common to seek to describe the probability of finding the electrons in the atom. While it is know that the electron is not a given point in the atom. The probability of finding the electron in the atom is given by the help of the quantum numbers that can be used to describe the position of the electron as shown.

In tis case, we have an electron that has the quantum numbers; n = 3, l = 2, ml = -2. This describes an orbital and there are two electrons in a given orbital.

Learn more about quantum numbers:https://brainly.com/question/16977590

#SPJ1

Ca(NO3)2 and H₂O. Option C is correct

The combination of acid and base to form salt and water at the product is known as a neutralization reaction.

Hence the products of the neutralization reaction between HNO3 and Ca(OH)2 must be salt and water

From the given option, the equivalent product that are salt and water is Ca(NO3)2 and H₂O which gives the required product.

Light below the necessary critical frequency doesn't eject electrons from metal because no electrons will be emitted when the light shines on the metal.

This is a term in physics which is used to describe the number of occurrences of a repeating event per unit of time.

The amount of energy which is present in each photon in the beam is determined by and proportional to the frequency of the beam. This therefore means that if there is light which is below the threshold frequency, there will be no electrons emitted when light shines on the metal thereby making it the correct choice.

Read more about Frequency here https://brainly.com/question/395982

#SPJ1

Answer:

The pH of the solution is 1.60.

Explanation:

1st) It is necessary to write and balance the chemical reaction:

Now we can see that 1 mole of NaOH reacts with 1 mole of HCl.

2nd) We have to calculate the moles contained in 15mL of 0.10M NaOH solution and the moles contained in 25mL of 0.10M HCl solution:

• Moles contained in NaOH solution:

• Moles contained in HCl solution:

Now we know that there are 1.5x10^-3 moles of NaOH and 2.5x10^-3 moles of HCl.

3rd) According to the stoichiometry of the reaction, 1 mole of NaOH reacts with 1 mole of HCl, so in this case, 1.5x10^-3 moles of NaOH will react with 1.5x10^-3 moles of HCl, because NaOH will be the limiting reactant and HCl will be the excess reactant.

So, now we have to calculate the excess of HCl:

2.5x10^-3moles - 1.5x10^-3moles = 1x10^-3moles

Now we know that there are 1x10^-3 moles of HCl left.

4th) Excess HCl will remain dissociated into H+ and Cl-, according to the following equation:

That means that for every mole of HCl, 1H+ dissociates. So, in this case, there are 1x10^-3 moles of H+.

Remember that these moles are contained in 40mL, so the molarity of H+ is 0.025M:

5th) Finally, we can calculate the pH of the solution, by replacing the H+ concentration in the pH formula:

So, the pH of the solution is 1.60.

Combination (also called synthesis): Where two elements or one compound and one element will bond and form a new compound as a product, the representation for this reaction is:

A + B -> AB

Decomposition: The opposite from Combination, now one compound will decompose and form 2 new elements or compounds as the product:

AB -> A + B

Single Replacement: One element will take the place of another element in already existing compound:

A + BC -> AB + C

Double Replacement: Now we have two compounds switching elements and forming two new compounds:

AB + CD -> AC + BD

Combustion: Reactions that involve oxygen as reactant and we have CO2 and H2O as products:

X + O2 -> CO2 + H2O

According to the explanation, what we have in this reaction is a Single Displacement reaction, letter A

Answer:

Explanation:

Here, we want to order the radiations in terms of energy

There is a proportional relationship between the mass and the energy

It is established that the radiation with a higher mass would have the lesser energy

Alpha decay has the highest mass and thus, the lowest energy. This is followed by beta decay, and finally, gamma decay

The stability of alkene can be determined by measuring the amount of energy that is associated with the hydrogenation of the molecule.

Because those branched alkanes are more stable than their linear isomers (Figure 1), the origins of this stability are unclear. For each branch in an alkane, the measured heat of formation is lower than expected by about 2 kcal mol−1 in comparison to the linear isomer. The fullness structures in which all atoms have complete valence shells are more stable. The structures with the least number of ritual charges are more stable. The structures with a negative charge on the further electronegative atom will be more stable. The three main factors determining the relative stability of alkenes are i) the number of substituents attached to the double-bond carbon atoms, ii) hyperconjugation, and iii) the stereochemistry of the double bond.

So we can conclude that the more electron-donating alkyl groups are the more stable the alkene

Learn more about it alkene here: https://brainly.com/question/24324797

#SPJ1

Taking into account the definition of pH and pOH, the concentration of OH⁻ is 1×10⁻² M.

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions:

pH= - log [H⁺]

Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

The following relationship can be established between pH and pOH:

pOH + pH= 14

Being [H⁺]=1.0×10⁻¹² M, the pH is calculated as:

pH= - log (1.0×10⁻¹² M)

Solving:

pH= 12

Being pH= 4.85, and considering the relationship between pH and pOH, pOH is calculated as:

pOH + 12= 14

pOH= 14 - 12

pOH= 2

Replacing in the definition of pOH the concentration of OH⁻ ions is obtained:

- log [OH⁻]= 2

Solving

[OH⁻]= 10⁻²

[OH⁻]= 1×10⁻² M

In summary, the [OH⁻] is 1×10⁻² M.

Learn more about pH and pOH:

brainly.com/question/16032912

brainly.com/question/13557815

#SPJ1

Answer:

b d my good mannnnnnnnnnnn

Answer:

61.09 grams SmO

Explanation:

To find the number of grams SmO, you need to multiply the moles by the molar mass of SmO. The molar mass is a ratio which represents the mass of SmO per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (moles should be in the denominator). The final answer should have 4 sig figs like the given value (0.3672 = 4 sig figs).

Atomic Mass (Sm): 150.36 g/mol

Atomic Mass (O): 15.999 g/mol

Molar Mass (SmO): 150.36 g/mol + 15.999 g/mol

Molar Mass (SmO): 166.359 g/mol

 0.3672 moles SmO           166.359 grams
--------------------------------  x  --------------------------  =  61.09 grams SmO
                                                   1 mole

To solve this question, we need to use the Clapeyron formula.

Clapeyron's formula is a mathematical expression that relates quantities such as pressure (P), volume (V), temperature (T) and the number of particles (n) that make up an ideal gas.

The formula is: PV = nRT

First, let's discover the number in moles of N2. We have:

P = 1.5 atm

V = 10 L

n = ???

R = 0.082 atm.L/mol.k

T = 273 K

1.5 x 10 = n x 0.082 x 273

15 = n x 22.386

n = 15/22.386

n = 0.67 moles

As we can see in the chemical reaction equation, the ratio between NaN3 and N2 is 2:3.

So:

2 mol of NaN3 --- 3 mol of N2

x mol of NaN2 --- 0.67 moles

3x = 2 x 0.67

x = 0.45 moles of NaN3

Now we transform this value into grams, using NaN3 formula mass, which is 65 g/mol:

65 g ---- 1 mol

x g ---- 0.45 mol

x = 29 g

Answer: 29 g of NaN3

Aluminum Oxide decomposes to Aluminum metal and Oxygen gas.

- First, write down each compound:

- Second, write the number of moles of each compound, so that we have the same amount of reactants as products. Here, it is important not to change the subscript of compound elements.

For example, let's start by adding a number 2 in front of the aluminum metal to balance:

So far, the amount of aluminum has been balanced but the amount of oxygen is unbalanced, so let's add a number 3 for the oxygen gas.

Now, to have the same amount of moles of oxygen on both sides, let's put a number 2 in the aluminum oxide:

Here, the amount of aluminum moles is unbalanced, so we add a number 4 for the aluminum metal to balance:

- This is the final balanced equation of decomposition of aluminum oxide:

Answer:

Explanation:

Carbon is the only element listed. Carbon Dioxide consists of Carbon AND Oxygen x2 so this is a compound. As stated earlier, air is a mixture of compounds. Water is another compound consisting of Hydrogen x2 and Oxygen.

Answer:

586.846 lbs

Explanation:

the molar mass of HCl is 1 + 35.45 = 36.45

this means you can do 16.1 lbmol * 36.45 lb/lbmol = 586.845

Remember: solution = NaOH + water

Volumen here = 1 L

Molecular mass NaOH = 39.99 g/mol

Answer: Contration = 14.32 M

Considering the definition of STP conditions, 4.83 × 10⁻³ moles of HF will occupy a volume of 0.108192 L at STP.

STP conditions is the abbreviation that refers to standard temperature and pressure. The standard value for pressure is 1 atmosphere and the standard value for temperature is 0°C. They are valid reference values for all gases, and under these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

In this case, you have 0.804 moles CCl₄. You can apply the following rule of three: if by definition of STP conditions 1 mole of CCl₄ occupies a volume of 22.4 liters, 0.804 moles occupies how much volume?

volume= (0.804 moles ×22.4 L)÷ 1 mole

volume= 18.0096 L

Finally, the volume will be 18.0096 L at STP.

Learn more about STP conditions:

brainly.com/question/21838343

brainly.com/question/17915431

#SPJ1

The general molecular equation is; [tex]Ba(CH3COO)_{2} (aq) + Na_{3} PO_{4} ------ > Ba_{3} (PO_{4})_{2} (s)+ Na(CH3COO)_{2} (aq)[/tex] while the net ionic equation is; [tex]2PO_{4} }^{3-} (aq) + 3Ba^{2+ } (aq) ------- > Ba_{3} (PO_{4})_{2} (s)[/tex]

We can define the term reaction as the interaction that occurs between the reactants and helps us to be able to get a product as shown. Now we have a case in which we are asked to write the molecular, ionic and net ionic equation, with the phases of matter for the reaction between Barium acetate + Sodium phosphate --> Barium phosphate + Sodium acetate.

The task now is to make use of the ideas that we have from the question to be able to determine both the molecular reaction equation as well as the net ionic equation as required.

Let us no take the reaction individually. We can write the molecular reaction as;

[tex]Ba(CH3COO)_{2} (aq) + Na_{3} PO_{4} ------ > Ba_{3} (PO_{4})_{2} (s)+ Na(CH3COO)_{2} (aq)[/tex]

After we have written the molecular reaction equation, then we can identify the spectator ions as  acetate ion and the sodium ion as we can see from the balanced reaction equation.

The net ionic equation therefore is;

[tex]2PO_{4} }^{3-} (aq) + 3Ba^{2+ } (aq) ------- > Ba_{3} (PO_{4})_{2} (s)[/tex]

Learn more about ionic equation:https://brainly.com/question/15466794

#SPJ1

Isotopes of certain __radioactive__ elements that spontaneously emit __radiation__ and _rays___ from the __nuclei____

Any of multiple species of the same chemical element with differing masses whose nuclei are unstable and spontaneously produce radiation in the form of alpha, beta, and gamma rays are known as radioactive isotopes, also known as radioisotopes, radionuclides, or radioactive nuclides.

Learn more about Isotopes here:

https://brainly.com/question/14220416

#SPJ13

The number of photons having a wavelength of 16.0 um required to produce 2.3KJ of energy is 1.85 x 10¹⁹

Photons are defined as a basic particle that is both the force carrier for the electromagnetic force and a quantum of the electromagnetic field, which includes electromagnetic radiation like light and radio waves.

It can also be defined as a discrete bundle of electromagnetic energy is what is known as a light particle.

Energy = 2.3 KJ

Wavelength = 16.0 x 10⁶ m

Energy = hc / ∧

            = 6.63 x 10²⁴ x 3 x 10³ / 16.0 x 10⁶

            = 1.24 x 10¹⁹ J

Number of photons used = 2.3 KJ / 1.24 x10¹⁹

                                          = 1.85 x 10¹⁹

Thus, the number of photons having a wavelength of 16.0 um required to produce 2.3KJ of energy is 1.85 x 10¹⁹

To learn more about photons, refer to the link below:

https://brainly.com/question/20912241

#SPJ1

Answer

2NaCl + Cal₂ → 2Nal + CaCI₂

Explanation

Given unbalanced equation;

NaCl + _Cal₂ → Nal + CaCI₂

Step 1: Balance the Cl atom on both the reactant and product sides of the equation by putting 2 as the coefficient of NaCl in the reactant side.

2NaCl + _Cal₂ → Nal + CaCI₂

Step 2: Balance the Na atom on both the reactant and product sides of the equation by putting 2 as the coefficient of NaI in the product side.

2NaCl + Cal₂ → 2Nal + CaCI₂

Therefore, the balanced equation is: 2NaCl + Cal₂ → 2Nal + CaCI₂

The complete ground-state electronic configuration of Mn⁺⁴ is:

Mn⁺⁴: [Ar] 4s⁰ 3d³

The electronic configuration is written according to the following principles:

Manganese being a d-block element possesses d-orbitals in the electron cloud. There are 25 electrons present in the ground-state configuration.

In order to reach the excited state, electrons will be removed from the ground state. The removal of electrons is centripetal in nature. Initially, 2 electrons will be removed from 4s, followed by the removal of 2 electrons from 3d.

Learn more about the Electronic configuration:

https://brainly.com/question/26084288

Answer:

Explanation:

Here, we want to get the percentage by mass of calcium carbonate in the limestone

We start by writing an equation of chemical reaction

The reaction involves calcium carbonate reacting with hydrochloric acid to give calcium chloride, carbon dioxide and water

We have the equation as follows:

Now, let us work with the extra information

16.89 g of calcium chloride are produced

Let us get the number of moles of calcium chloride produced

We can get that by dividing the mass by the molar mass of calcium chloride

The molar mass of calcium chloride is 111 g/mol

So, the number of moles will be:

From the equation,

1 mole of calcite gave 1 mole of calcium chloride, then 0.1522 mole of calcium chloride was produced by 0.1522 mole of calcite

To get the mass of calcite that produced this, we have to multipply the number of moles by the molar mass of calcite

The molar mass of calcite is 100 g/mol

That means the mass of calcite that produced the calcium chloride will be:

What this mean is that 15.22 g of calcite produced the given mass of calcium chloride

The percentage by mass of calcite in the limestone will be:

The moles of gas added could not be determined because of an apparent error in the data provided for the volume of the container.

The moles of gas in the container is calculated from the ideal gas equation as follows;

Data given:

P = 131,874 Pa or 131.874 kPa

V = 54.7 mL = 0.0547 L

T = 113.7 °C or (113.7 + 273) K

T = 386.7 K

R, molar gas constant  = 8.314 L⋅kPa.K/mol

n = (131.874 * 0.0547 L) / (8.314 * 386.7 )

n = 0.000224 moles

Learn more about moles of gas at: https://brainly.com/question/27351134

#SPJ1

The detailed steps to measure the volume of a piece of rock using a graduated cylinder and beaker are based on Archimedes' Principle, which states that an object that is displacing fluid has a weight equal to that of the object it is displacing.

The submersion or dunking method is another name for the displacement method.

Learn more about the displacement method here: https://brainly.com/question/28588797

The process of photosynthesis used by plant in which they produce sugar ( glucose ).

Photosynthesis is the process in which plants produced sugar by using sun - light , water and carbon dioxide. In the process of photosynthesis plants use carbon dioxide ( CO₂ ) and water H₂O from the air and the soil  then this carbon dioxide and water transforms to oxygen and sugar (glucose). the oxygen produced by plant back into the air and the sugar produces stores by the plant as the form of energy.

                                                sunlight

carbon dioxide  +   water       -------------->     glucose   +   oxygen

In the leaf cell a part called chloroplast in it energy in sunlight used to break oxygen and hydrogen. T he water required in the process of photosynthesis taken by the roots from soil and then it transport with the help of xylem cell to the different parts of plant. phloem takes sugar from leaves to different parts of plant. The stomata is for the transpiration exchange that means it takes carbon dioxide and the release oxygen back to air after the photosynthesis end.

To learn more about Photosynthesis here

https://brainly.com/question/1388366

#SPJ1

Answer:

Explanation:

molar mass of 13c = 13 grams

number of moles = mass / molar mass

therefore,

number of moles = 7 / 13

To know the number of atoms in 7/13 moles, we simply multiply the number of moles by Avogadro's number as follows:

number of atoms = (7/13) x 6.022 x 10^23 = 3.2426 x 10^23 atoms

The International System of Units uses the mole (symbol: mol) as the unit of substance amount.

In 5.67 moles of CO2 there exists 249.48 grams of CO2.

Start by dividing the number of atoms by the atomic weight of each component of the compound to convert grams to moles. After that, tally up all of your responses to determine the compound's molar mass. The final step is to calculate the number of moles by dividing the number of grams of the compound by its molar mass.

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

Let the equation be

Mass = relative atomic mass × mole number

substitute the values in the above equation, we get

= 5.67 × (12 + 16 + 16)  

= 249.48 g

Therefore, there exists 249.48 grams of CO2 are in 5.67 moles of CO2.

To learn more about calculation of grams in moles refer to:

https://brainly.com/question/28902645

#SPJ2

Answer:

262

Explanation:

The concertation of the HI that would be present in the new equilibrium position is 0.15 M.

We have to first obtain the equilibrium constant that we have under the initial conditions and then we have; H2 + I2 ------> 2HI

K = [HI]^2/[H2] [I2]

K = (0.490)^2/(0.080) (0.060)

K = 0.2401/(0.080) (0.060)

K = 50

Again;

                               H2      +      I2                     ------> 2HI

Initial                     0.080           0.060                        0.060

concentration         +x                   +x                            -2x

Equilibrium     0.080 + x      0.060 + x                 0.490 - 2x

50 = (0.490 - 2x)^2/( 0.080 + x) (0.060 + x)

Working through the quadratic we have;

46x^2 + 10.2 x - 0.38 = 0

x = 0.32 M

In each case we now have;

 H2 =  0.080 +  0.32  = 0.4 M

[I2] = 0.060  +  0.32  = 0.38 M

[HI] = 0.790 - 2( 0.32 ) = 0.15 M

Learn more about equilibrium position:https://brainly.com/question/10374921

#SPJ1