When the nuclide iron-59 undergoes beta decay: The name of the product nuclide is . The symbol for the product nuclide is .

Answer:

The study of the inorganic world

Explanation:

That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:

physics is matter and energy. it explores mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms.

Answer:

0.02kg

Explanation:

Given parameters:

Amount of heat  = 5200J

Unknown:

Mass of ice that would be melted at 0°C = ?

Solution:

To solve this problem, use the expression below;

        H  = mL

H is the heat

m is the mass

L is the latent heat of fusion of ice  =  3.33 x 10⁵ J/kg.

 Insert the parameters and solve for m;

           5200  = m x 3.3 x 10⁵

             m  = \(\frac{5200}{3.33 x 10^{5} }\)   = 0.02kg

Step 1 - Finding the stoichiometry of the reaction

The given reaction is:

The stoichiometry of the reaction can be found by reading the bigger numbers, those that come before the formulas of the substances:

1 mole of C3H8 react with 5 moles of O2 thus producing 3 moles of CO2 and 4 moles of H2O

Since the exercise is specifically asking us about the proportion between C3H8 and water, we can simplify the statement above to:

1 mole of C3H8 produces 4 moles of H2O

Step 2 - Converting the number of moles of C3H8 to grams

Note that the exercise is asking us about how much water would be produced if we used 43.5 grams of C3H8. For sake of simplicity, let's convert the number of moles of C3H8 to mass (grams).

Converting moles to grams is easy. We just have to multiply the number of moles by the molar mass of the substance (44 g/mol for C3H8):

We can now rewrite the statement in step 1 as:

44 g of C3H8 produce 4 moles of H2O

Step 3 - Finding how many moles of water would be produced

Now we just have to set a proportion:

Therefore, 3.95 moles of H2O would be produced in this reaction.

Answer:

The main difference between emission and absorption spectra is that an emission spectrum has different coloured lines in the spectrum, whereas an absorption spectrum has dark-coloured lines in the spectrum.l

Answer:

Explanation:

This is a halogenation reaction i.e substitution or replacement of a single or more than a single hydrogen atom in the organic alkane compound with the halogen(here it is chlorine).

The chlorination of 1-chloro-2,2,3,3-tetramethylpentane under UV light resulted in the formation of five (5) dichloro derivatives which are shown in the image attached below.

Also, the compounds containing a stereocenter (i.e a location within the compound composing of various substituents in which the interchangeability of these substituents has the tendency of resulting into a stereoisomer) are indicated with an asterisk in the image below.

From the image below:

compound 1 ⇒  1,1-dichloro-2,2,3,3-tetramethylpentane = 2° C

∴

The given relative reactivity rate for 2°  = 3.6x

For compound 2 ⇒  1,4-dichloro-2,2,3,3-tetramethylpentane = 2°  = 3.6x

For compound 3 ⇒ 1,5-dichloro-2,2,3,3-tetramethylpentane = 1°  = 1x

For compound 4 ⇒ 1-chloro-2-chloromethyl-2,3,3-trimethylpentane

= 1°  = 1x

For compound 5 ⇒ 1-chloro-3-chloromethyl-2,2,3-trimethylpentane

= 1°  = 1x

As such, we have:

2(3.6x) + 3(1x) = 100

7.2x + 3x = 100

10.2x = 100

x = 100/10.2

x = 9.803°

∴

For compound (1) = 3.6(9.803) = 35.3%

For compound (2) = 3.6(9.803) = 35.3%

For compound (3) = 1(9.803) = 9.803°%

For compound (4) = 1(9.803) = 9.803°%

For compound (5) = 1(9.803) = 9.803°%

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

Answer:

0.00246kg

Explanation:

1g = $40.63

$100 = $100/40.63 = 2.46g

2.46/1000 g = 0.00246kg

Answer:

We can use the formula for heat lost by a substance to calculate the final temperature:

Q = m * c * ΔT

where Q is the heat lost, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.

In this case, we know the values of Q, m, and c, and we need to find ΔT. Rearranging the formula, we have:

ΔT = Q / (m * c)

Substituting the given values, we get:

ΔT = 9750 J / (335 g * 4.18 J/(g*°C)) ≈ 6.9 °C

Therefore, the final temperature of the water is:

65.5 °C - 6.9 °C ≈ 58.6 °C

So the final temperature of the water is approximately 58.6 °C.

The final temperature of the water is approximately 58.5°C.

To find the final temperature of the water, we first need to understand that the heat lost by the water is calculated using the formula q = mcΔT, where 'q' is the Heat Transfer, 'm' is the mass of the water, 'c' is the specific heat of the water, and 'ΔT' is the change in temperature.

First, rearrange the formula to find ΔT = q/(mc).

Then, insert the given values (q = -9750 J, m = 335 g, c = 4.18 J/g°C).

The negative sign denotes heat loss.

You will find ΔT is approximately -7°C.

This is the amount the temperature decreases.

Subtract ΔT from the initial temperature of the water (65.5°C - 7°C), to get the final temperature of approximately 58.5°C.

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Koby needed to break the baking soda to provide a larger surface area for reaction thereby increasing the rate of reaction.

The term rate of reaction refers to how quickly or slowly a reaction proceeds. The surface area of solid reactants is an important factor that influences the rate of reactions when a solid reactant is involved.

Hence, Koby needed to break the baking soda to provide a larger surface area for reaction thereby increasing the rate of reaction.

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Answer:

A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.

Explanation:

Conductivity is an example of a physical property. Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical composition.

Conductivity specifically refers to a material's ability to conduct electricity or heat. Materials with high electrical conductivity allow electricity to flow easily through them, while materials with high thermal conductivity conduct heat efficiently.

Examples of conductive materials include metals like copper and aluminium, which are widely used in electrical wiring and heat transfer applications due to their excellent conductivity properties.

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Taking into account the definition of molarity, the number of moles of MgCl₂ present in 60.0 mL of 0.100 M MgCl₂ solution is 0.006 moles.

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by:

molarity= number of moles of solute÷ volume

Molarity is expressed in units moles/L.

In this case, you have:

Replacing in the definition of molarity:

0.100 M=number of moles of MgCl₂÷ 0.06 L

Solving:

0.100 M × 0.06 L= number of moles of MgCl₂

0.006 moles= number of moles of MgCl₂

Finally, the number of moles of MgCl₂ is 0.006 moles.

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Answer:

To determine the change in mass of A over the given time period, we need to find the difference between the initial mass of A and the final mass of A.

From the given table, we can see that the initial mass of A at t = 0 (start time) is 12.4 g and the final mass of A at t = 60 minutes (end time) is 6.2 g.

Therefore, the change in mass of A over 60 minutes is:

Final mass of A - Initial mass of A

= 6.2 g - 12.4 g

= -6.2 g

The negative sign indicates that the mass of A decreased over time, which means that A underwent some kind of reaction or process that caused it to lose mass.

The change in mass of A over 60 minutes is -6.2 grams.

To determine the change in mass of A over 60 minutes, we need to compare the initial mass to the final mass.

From the given information, we can see that the mass of A decreases over time.

Let's calculate the change in mass.

Initial Mass of A: 12.4 g

Final Mass of A: 6.2 g

Change in Mass of A = Final Mass of A - Initial Mass of A

= 6.2 g - 12.4 g

= -6.2 g

The change in mass of A over 60 minutes is -6.2 grams.

Note that the negative sign indicates a decrease in mass.

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Answer: The volume of a saturated solution of X in water that would contain 34.0g of X  is 43.9 ml

Explanation:

Solubility is defined as the amount of solute dissolved per 100 ml of the solvent at a fixed temperatur.

Given :  solubility of ionic compound X  in water at \(15^0C\) = 0.776 g/ml

0.774 g of X is contained in = 1 ml

Thus 34.0 g g of X is contained in = \(\frac{1}{0.774}\times 34.0=43.9 ml\)

Thus the volume of a saturated solution of X in water that would contain 34.0g of X  is 43.9 ml

Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

1208.9213 not then what's the answer

Answer:

Ions.

Explanation:

Hello!

In this case, since iron is a metal which has lots of uses in the design of metallic alloys and materials, when it is at its ground state we say it is just Fe; however, since it is a metal, it is very likely to lose electrons and therefore getting positively charged as +2 or +3, say:

\(Fe^{2+}\\\\Fe^{3+}\)

Thus, since they are positively charged, they are classified as cations, which are ions.

Best regards!

STEP-BY-STEP EXPLANATION

Sodium chloride (NaCl) exists in a solid state cause it possesses a high melting point. NaCl has a strong force attraction between sodium ion and chloride ion and this invole the transferring of electrons from sodium to chloride. Therefore, sodium chloride exists in the solid state.

The symbol is shown as Cr³+ because it loses electrons. Option A

When we talk about the process of oxidation, what is going on is the loss of electrons. Thus it is possible to say that ocidation is electron loss. The electrons that are lost would lead to the formation of a specie that has a positive ion.

The magnitude of the positive charge that we see in the compound is based on the number of electrons that it has lost in the process of the oxidation of the compound. There are three electrons that have been lost for chromium as shown.

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The order of increasing bond length is d) c-f < c-cl < c-s

The bond length of a covalent bond is determined by the size of the atoms involved and the strength of the bond. The size of the atoms involved in the c-f, c-s, and c-cl bonds are carbon, fluorine, sulfur, and chlorine, respectively. Carbon and fluorine are smaller atoms, while sulfur and chlorine are larger atoms. Therefore, the c-f bond will be the shortest bond.

The strength of the covalent bond is determined by the electronegativity of the atoms involved. Fluorine has the highest electronegativity of all the elements, followed by chlorine and then sulfur. Therefore, the c-f bond will be the strongest bond. The c-cl bond will be the second strongest bond, and the c-s bond will be the weakest bond.

Given these facts, the order of increasing bond length is c-f < c-cl < c-s. The c-f bond will be the shortest and strongest bond, followed by the c-cl bond and then the c-s bond.

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0.6 is the equilibrium constant for the given reaction.

To calculate the equilibrium constant (K) for the given reaction, we need to use the molar concentrations of the reactants and products at equilibrium. The equilibrium constant expression is given by:

\(K= [H_{2}O]^{2} / ([H_{2}^{2} * [O_{2}])\)

Given the moles of H2, O2, and H2O in the 8.1 L container, we can convert them to molar concentrations by dividing the number of moles by the volume:

[H2] = 1.83 moles / 8.1 L

[O2] = 2.33 moles / 8.1 L

[H2O] = 3.95 moles / 8.1 L

Substituting these values into the equilibrium constant expression, we have:

K = \((3.95 / 8.1)^{2}\) / (\((1.83 / 8.1)^{2}\) * (2.33 / 8.1))

Evaluating this expression and rounding to one decimal place, we find the equilibrium constant to be:

K ≈ 0.6

Therefore, the equilibrium constant for the given reaction is approximately 0.6.

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Answer:

4.74.

Explanation:

The equilibrium equation for the hydrolysis of NH4+ is:

NH4+ + H2O ⇌ NH4OH + H+

The Cl- ion is a strong base and will not undergo hydrolysis in water. Therefore, the Cl- ion will not affect the pH of the solution.

Use the equilibrium constant for the hydrolysis of NH4+ (Kb) to calculate the pH of the solution.

The expression for the equilibrium constant for the hydrolysis of NH4+ is:

Kb = [NH4OH][H+] / [NH4+]

Given that the concentration of NH4Cl is 1.0 mol/L, the concentration of NH4+ ions is also 1.0 mol/L.

The concentration of hydroxide ions (OH-) can be calculated from the Kb expression:

Kb = [NH4OH][H+] / [NH4+]

[OH-] = Kb * [NH4+]

Knowing that the Kb for NH4+ = 1.810^-5

[OH-] = 1.810^-5 * 1.0 = 1.8*10^-5 M

The pH of the solution is the negative logarithm of the hydroxide ion concentration:

pH = -log([OH-])

pH = -log(1.8*10^-5)

pH = 4.74

Therefore, the pH of 1.0 mol/L solution of NH4Cl is 4.74.

Answer:

D

Explanation:

To convert from celcius to kelvin add 273 to the celcius number. D has -75 celcius so if you add -75 to 273 you get 198 K

The correct equation that converts degree celsius to kelvin is -75°C = 198K

To convert from celcius to kelvin we have to add 273 to the celcius number.

i.e degree celsius + 273= kelvin

option D has -75 celcius so if you add -75 to 273 we get 198 K.

A kelvin is the same size as a Celsius degree.

Absolute zero is 0 K and the freezing point of water is 273.15 K.

To get the freezing point of water to be 0 °C, we must subtract 273.15 from the Kelvin reading (see Figure).

C = K – 273.15  

C = 273.15 – 273.15  

C = 0 °C  

To get absolute zero on the Celsius scale, we repeat the process.

C = 0 – 273.15  

C = –273.15 °C

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Answer:

2.25 M

Explanation:

The reaction that takes place is:

First we calculate how many potassium iodide moles reacted, using the given volume and concentration:

Then we convert 45 mmoles of KI into mmoles of Pb(NO₂)₃, using the stoichiometric coefficients of the balanced reaction:

Finally we calculate the molarity of the Pb(NO₂)₃ solution, using the calculated number of moles and given volume:

Answer:

The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.

Answer:

Bronsted lowry base = Proton acceptor = H2O

Bronsted lowry acid = Proton donor = HF-

Explanation:

The equation is given as;

HF-(aq) + H2O(l) --> F-(aq) + H3O(aq)

A bronsted lowry base is any specie that can accept hydrogen ion (proton) from another molecule.

Basically a bronsted lowry base is  a proton acceptor while a bronsted lowry acid is a proton donor.

In the reaction above, upon comparing both the reactants and products;

Bronsted lowry base = Proton acceptor = H2O

Bronsted lowry acid = Proton donor = HF-

Answer:

Crust

Explanation:

Answer:

The crust

Explanation:

The chemical formula for copper(II) sulfate is CuSO4.

Copper(II) sulfate is a chemical compound that is made up of copper, sulfur, and oxygen. It has the chemical formula CuSO4 and is commonly referred to as "blue vitriol" or "bluestone." Copper(II) sulfate can be prepared by reacting copper oxide or copper metal with sulfuric acid. It is a blue-colored crystalline solid that dissolves easily in water.

Copper(II) sulfate has many uses in industry and can be used as a fungicide, herbicide, pesticide, and in the manufacture of other chemicals. It is also commonly used in schools and laboratories as a reagent in chemical reactions and experiments.

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Answer:

C.) protons and neutrons

Explanation:

Most atoms contain proton(s), neutron(s), and electron(s). Within the nucleus of an atom, there are protons and neutrons. Electrons are located outside of the nucleus.

Answer:

Ksp = 256(s)⁵

Explanation:

The given insoluble salt dissolves as:

\(MX4 <-----> M4+ \ \ \ \ \ \ + \ \ \ \ \ \ \ 4X -\)

                                     s                          4s

The solubility product is the product of individual solubilities of the cation and anion of a salt.

\(Ksp = [M4+][X^-]^4\)

\(Ksp = [s][4s]^4\)

Ksp = 256(s)⁵