2.)What will Ge-72 and Ge-73 be called?
-How are these atoms similar?
-How are they different?











ANYONE PLEASE HELP ME WITH MY CHEMISTRY HOMEWORK I REALLY NEED THE ANSWER RIGHT NOW I HOPE Y’ALL CAN HELP ME:(

The correct series of radioactive decays that would convert Pa-234 to Ra-226 is option A, which involves beta, alpha, and beta decay.  Option C involves both alpha and beta decay, but the sequence of decays is incorrect, and therefore, it would not lead to the conversion of Pa-234 to Ra-226.

The Beta decay involves the emission of a beta particle (an electron) from the nucleus, while alpha decay involves the emission of an alpha particle (two protons and two neutrons) from the nucleus. In option A, the Pa-234 nucleus undergoes beta decay to become U-234, which then undergoes alpha decay to become Th-230. Finally, Th-230 undergoes beta decay to become Ra-226. Alpha decay is generally favored by heavier nuclei, while beta decay is favored by lighter nuclei. Gamma decay, on the other hand, involves the emission of a gamma ray, which is a high-energy photon, and does not result in a change in the identity of the nucleus. Therefore, option E is not a valid series of decays to convert Pa-234 to Ra-226. Option B involves only alpha decay, which is not sufficient to convert Pa-234 to Ra-226. Option C involves both alpha and beta decay, but the sequence of decays is incorrect, and therefore, it would not lead to the conversion of Pa-234 to Ra-226.

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Answer:

False ,

Explanation:

Protons are found in the nucleus , but electrons are found on the outside ( electron cloud )

Answer:

39.02 amu

Explanation:

The average atomic mass of an element can be calculated as follows :

\(X=\dfrac{9.67\times 38+78.68\times 39+11.34\times 40+0.31\times 41}{100}\\\\X=\dfrac{3902.29}{100}\\\\X=39.02\ amu\)

So, the atomic mass of the element X is 39.02 amu.

Answer:

Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

Explanation:

hope it helps

Answer:

Explanation:

The first thing that you need to do here is to calculate the theoretical yield of the reaction, i.e. what you get if the reaction has a

100

%

yield.

The balanced chemical equation

N

2

(

g

)

+

3

H

2

(

g

)

→

2

NH

3

(

g

)

tells you that every

1

mole of nitrogen gas that takes part in the reaction will consume

3

moles of hydrogen gas and produce

1

mole of ammonia.

In your case, you know that

1

mole of nitrogen gas reacts with

1

mole of hydrogen gas. Since you don't have enough hydrogen gas to ensure that all the moles of nitrogen gas can react

what you need

3 moles H (sub 2)

>

what you have

1 mole H (sub2)

you can say that hydrogen gas will act as a limiting reagent, i.e. it will be completely consumed before all the moles of nitrogen gas will get the chance to take part in the reaction.

So, the reaction will consume

1

mole of hydrogen gas and produce

1

mole H

2

⋅

2 moles NH

3

3

moles H

2

=

0.667 moles NH

3

at

100

%

yield. This represents the reaction's theoretical yield.

Now, you know that the reaction produced

0.50

moles of ammonia. This represents the reaction's actual yield.

In order to find the percent yield, you need to figure out how many moles of ammonia are actually produced for every

100

moles of ammonia that could theoretically be produced.

You know that

0.667

moles will produce

0.50

moles, so you can say that

100

moles NH

3

.

in theory

⋅

0.50 moles NH

3

.

actual

0.667

moles NH

3

.

in theory

=

75 moles NH

3

.

actual

Therefore, you can say that the reaction has a percent yield equal to

% yield = 75%

−−−−−−−−−−−−−

or 75 moles NH sub3

I'll leave the answer rounded to two sig figs.

Answer:

100%

Explanation:

After distributing the alleles, the genotype Rr will be left in all 4 boxes of the Punnet Square.

Explanation:

cooked rice

nutrient

carbohydrate.

Boiler eggs

nutrient

Protein.

The mass of gold is 193g.

Density is defined as the mass of a material substance per unit volume. The equation for density is d = M/V, where d stands for density, M for mass, and V for volume. It is generally measured in grams per cubic centimeter. Density provides an easy way to calculate a body's mass from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d).

Now, in the given question,

Density of gold = 19.3 g/cm³

Volume of gold = 10 cm³

Since,  Density = Mass/Volume

Therefore, Mass of gold = Density of gold × Volume of gold

                                        = 19.3g/cm³ × 10 cm³

                                       = 193g.

Hence, the mass of gold is 193g.

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If an IV bag of 500 mL D5W is infusing at a rate of 50 mL/hr, and the IV bag was hung at 11:30 am, the infusion will be complete in 10 hours and 30 minutes.

To determine the time it takes for the infusion to be complete, we need to consider the volume of the IV bag and the infusion rate.

The IV bag contains 500 mL of D5W (5% dextrose in water). The infusion pump is set at a rate of 50 mL/hr, which means 50 mL of the solution is administered every hour.

To find the time it takes for the infusion to be complete, we divide the total volume of the IV bag (500 mL) by the infusion rate (50 mL/hr):

Time = Volume / Rate

Time = 500 mL / 50 mL/hr

Time = 10 hours

Since the IV bag was hung at 11:30 am, we add 10 hours to this time to determine when the infusion will be complete:

11:30 am + 10 hours = 9:30 pm

Therefore, the infusion will be complete at 9:30 pm.

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The compounds that can dissociate in water from the options given below are;

Ba(NO3)2

CaSO4

Mg3(PO4)2

Dissociation of compound is the process by which compounds degraded into smaller unit which can also recombine to form larger one in another condition.

When ionic compounds dissociate in water, the water molecules separate the ionic crystal. This is because of the attraction between the positive and negative ions in the crystal.

Therefore, The following compounds dissociate in water.

Ba(NO3)2

CaSO4

Mg3(PO4)2

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Answer:

Hi there!

Your answer is:

In a solar eclipse, we see two types of shadows. One is the "umbra" or the darkest shadow caused by the sun. It's located in the center.

The "penumbra" in a solar eclipse is the shadow that's lighter and located on the sides of the earth. Think about it like this:

The sun and earth are in line. The darkest shadow will continue in that line. That is the umbra. The penumbra continues directly on the outside of the umbra. It's lighter that the other shadow!

A penumbra solar eclipse is when the sun, moon, and earth DONT align properly. This causes a partial eclipse, not a full eclipse. A penumbra solar eclipse is a Partial solar eclipse.

Hope this helps! To be clear, none of this is copied. This is based off of my previous knowledge on the subject and interest in phenomena such as these!

Hi there!

Here's a picture to show you. Does this help?

When Li₂O is added as an impurity to CaO and Li+ substitutes for Ca²⁺, we would expect to form Ca²⁺ vacancies. This is because when Li⁺ takes the place of Ca²⁺, the Ca²⁺ ions that were originally in their lattice sites are now missing, leaving behind vacancies.

For every Li⁺ added, one Ca²⁺ vacancy would be created. This is because the charge of the Li⁺ ion (+1) is equivalent to the charge of the Ca²⁺ ion (+2). Therefore, for every Li⁺ ion that takes the place of a Ca²⁺ ion, one Ca²⁺ ion is missing, leaving behind one Ca²⁺ vacancy.

It is important to note that the presence of vacancies can affect the physical and chemical properties of the material. For example, in metals, vacancies can contribute to the diffusion of atoms through the lattice, which can affect the material's strength and ductility. In ionic solids, such as CaO, vacancies can affect the material's ionic conductivity and optical properties. Therefore, the presence of Li⁺ impurities and resulting vacancies in CaO can have significant impacts on its properties and potential applications.

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The correct answer is transversion at the first position of the GGA codon.

Explanation:

A single-base substitution in a codon can result in a nonsense mutation (UAA, UAG, or UGA). In this case, one of the codons for the amino acid Gly (Glycine) undergoes this mutation. The codons for Gly are GGU, GGC, GGA, and GGG.

A transversion mutation involves substituting a purine (A or G) with a pyrimidine (C or U), or vice versa. In this case, the GGA codon undergoes a single-base substitution at the first position. When the first G (a purine) is replaced with a U (a pyrimidine), it becomes a UGA codon, which is a nonsense mutation.

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Answer:

Explanation:

Satellite acts as a relay station for earth sources. A transmission station sends the information to the satellite, which in turn retransmits to the receiving stations. The original signal being transmitted from the earth station to the satellite is called uplink of 6 GHz The retransmitted signal from the satellite to the receiving station is called downlink of 4 GH frequency. The transponder is the transmitter-receiver combination in a transponder.

Answer: Sodium chloride is an ionic solid, and when it dissolves in water, its individual sodium and chloride ions are dissociated from one another. Sugar molecules, on the other hand, maintain the bonds between their constituent atoms when dissolved, and thus remain as whole molecules in the solution.

Explanation: Here's why: Salt is about 25% more dense than sugar. Therefore a teaspoon of salt weighs more than a teaspoon of sugar by almost 25%. Your dissolving test would not be accurate because you would be starting out with a larger mass of salt than sugar.

The oxygen ion is commonly abbreviated as O2. As a result, the charge produced when oxygen forms an ion is 2

With an electron configuration of (2, 6), oxygen requires two electrons to occupy the n=2 energy level and achieve an octet of electrons in the outermost shell. As a result of acquiring two electrons, the oxide ion will have a charge of two.

We have one, two, three, four, five, and six valence electrons around the oxygen in our illustration, thus six minus six equals zero, and the formal charge on oxygen is zero.

Oxygen normally contains two bonds, but it can have three. If the O has three bonds, it is positively charged. An oxygen atom will frequently have only one link, however the oxygen atom will be negatively charged. Polyatomic ions are prominent outliers to the rule that halogens have only one bond.

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Answer:

Transform boundary

Explanation:

The boundary that is a site of recurring earthquake and faulting activities is the transform boundary.

At a transform boundary, there is a significantly high prevalence of earthquakes and faulting.

3.00 ×10² g of HF.

A Thermochemical Equation is a balanced stoichiometric chemical equation that includes the enthalpy change, ΔH. In variable form, a thermochemical equation would look like this:

A + B → C. ΔH = (±) #

The thermochemical reaction is of two types:

Endothermic Reaction Those thermochemical reactions in which heat is absorbed. Change in enthalpy for this reaction is positive.

Exothermic Reaction Exothermic reactions are the reaction in which the heat or the energy is evolved during the reaction.

SiO2 + 4 HF(g)  →  SiF4(g) + 2 H20(l)    ΔH®rxn=-184 kJ

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Answer:

elements= Fe, N2

compounds= NaCl, LiBr, H2O2, C6H12O6

molecules= NaCl, H2O2, LiBr

formula unit= NaCl, LiBr

Answer:

Explanation:

Elements:  Fe   ,   N2

Compounds: NaCl   LiBr   C6H12O6     H2O2

molecules: N2 C6H12O6 H2O2

Formula Units: C6H12O6  H2O2

The enthalpy change of the reaction of decane would be -6582.3 kJ/mol of decane.

The enthalpy change of a reaction can be calculated using the following equation:

ΔH = ∑nΔH_f(products) - ∑mΔH_f(reactants)

We are given the standard molar enthalpy of formation of n-decane, C10H22, which is -249.4 kJ/mol.

Using the balanced chemical equation, we can identify the stoichiometric coefficients of the reactants and products:

C10H22(I) + 12.5O2(g) --> 10CO2(g) + 11H2O(g)

Reactants:

n(C10H22) = 1

n(O2) = 12.5

Products:

n(CO2) = 10

n(H2O) = 11

Now we can calculate the enthalpy change of the reaction:

ΔH = ∑nΔH_f(products) - ∑mΔH_f(reactants)

ΔH = [10(-393.5 kJ/mol) + 11(-241.8 kJ/mol)] - [1(-249.4 kJ/mol) + 12.5(0 kJ/mol)]

ΔH = -6582.3 kJ/mol

The enthalpy change of the reaction is -6582.3 kJ/mol of decane.

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The solvent plays an essential role in facilitating the reaction but does not directly participate as a reactant or a product.Water can participate directly in the solvolysis reaction.

Similarly, acetone, as a solvent, does not directly participate in the reaction but serves as a medium for the solvolysis reaction to occur. Acetone acts as a polar aprotic solvent, meaning it has a polar nature but lacks a hydrogen atom capable of forming hydrogen bonds with the solute. Water, on the other hand, can participate directly in the solvolysis reaction. Water molecules can act as nucleophiles or leaving groups, depending on the specific solvolysis mechanism. Water's ability to donate or accept a proton makes it an important component in various solvolysis reactions.

If the solvent were a mixture of 60 percent water and 40 percent acetone, it would have implications for the solvolysis reaction. The presence of more water would increase the concentration of water molecules, which could enhance its role as a nucleophile or leaving group. This could potentially increase the reaction rate and favor certain reaction pathways. The higher concentration of acetone would also affect the reaction kinetics, as acetone has a different polarity and solvent strength compared to water. The change in solvent composition could influence the reaction mechanism and the stability of intermediates formed during the solvolysis process.

Overall, the solvent composition, specifically the ratio of water to acetone, can impact the solvolysis reaction by influencing the nucleophilic or leaving group properties of the solvent and altering the reaction kinetics and mechanism.

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Positron Emission Tomography (PET) and Functional Magnetic Resonance Imaging (fMRI) are technologies that enable social psychologists to examine the brain’s activity in real-time.

PET and fMRI have many applications in the field of social psychology as they allow researchers to examine the brain’s activity in real-time when participants are engaged in social activities. PET imaging is used to measure brain activity by detecting the gamma rays produced by the positron emitted by the radioisotope injected into the subject's bloodstream, while fMRI uses magnetic fields to detect changes in blood flow and oxygen consumption in the brain.

These imaging technologies allow researchers to identify which areas of the brain are activated when a participant is engaged in social interactions, such as experiencing empathy, making decisions, or experiencing emotions. This allows researchers to understand how the brain processes social information and can inform our understanding of how social behavior is generated and regulated. So therefore Positron Emission Tomography (PET) and Functional Magnetic Resonance Imaging (fMRI) are two of the most commonly used imaging technologies in modern neuroscience research.

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Answer:

true

Explanation:

Because Mercury can be solidified when its temparature us brought to its freezing point. However, when returned to room temparature conditions, mercury does not exist in solid state for long, and returns back to its more common liquid form.

A. The net ionic equation is: \(SO_4^{2-}(aq) + Ca^{2+}(aq)\) → \(CaSO_4(s)\)

B. There is no net ionic equation for this reaction, and we can simply write: \(NaOH(aq) + HNO_3(aq)\) → \(H_2O(l) + NaNO_3(aq)\)

A. For the reaction \(MgSO_4(aq) + CaCl_2(aq)\)→ \(CaSO_4(s) + MgCl_2(aq)\), the complete ionic equation is:

\(Mg^{2+}(aq) + SO_4^{2-}(aq) + Ca^{2+}(aq) + 2Cl^-(aq)\) → \(CaSO_4(s) + Mg^{2+}(aq) + 2Cl^-(aq)\)

In this equation, \(Mg^{2+}\) and \(Cl^-\) ions are present on both sides of the equation, which means they are spectator ions and do not participate in the reaction.

B. For the reaction \(NaOH(aq) + HNO_3(aq) + H_2O(l) + NaNO_3(aq)\), we can write the complete ionic equation as:

\(Na^+(aq) + OH^-(aq) + H^+(aq) + NO^{3-}(aq) + H_2O(l) + Na^+(aq) + NO^{3-}(aq)\) → \(2Na^+(aq) + 2NO^{3-}(aq) + 2H_2O(l)\)

In this equation, \(Na^+\) and \(NO^{3-}\) ions are present on both sides of the equation, which means they are spectator ions and do not participate in the reaction.

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For a weak acid, the \(pk_a\) value is an intrinsic property of the molecule and depends on how tightly bound the \([H^+]\) is.

In chemistry, an intrinsic property is a property of a substance that is independent of the amount of the substance present. Such properties are mainly dependent on chemical composition and structure.

The \(pk_a\) value is the negative base 10 logarithm of the acid dissociation constant (\(k_a\)) of a solution.

\(pk_a=-log_{10}(k_a)\).

As the acid dissociation constant (\(k_a\)) of a solution is an intrinsic property, hence the \(pk_a\) value is also an intrinsic property.

The acid dissociation constant (\(k_a\)) of a solution depends on the fact that if the acidic hydrogen \([H^+]\) is tightly bounded, then the value of \(k_a\) will be decreased, which leads to the increase in the value of \(pk_a\).

Hence, for a weak acid, the \(pk_a\) value is an intrinsic property of the molecule and depends on how tightly bound the \([H^+]\) is.

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The total mass of sodium chloride is 58.44 g/mol.

The mass of sodium is 22.99 g/mol.

To find the percent sodium in sodium chloride can be found by dividing the amounts.

Therefore, the percent sodium is 39%.

The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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Answer:

This molecule is AgN3

Explanation:

Answer:

AgN3

Explanation:

Mass of nitrogen N is given as 24.36 g

Molar mass of nitrogen N= 14 g/mol.

amount of substance in mol of N = mass/molar mass

=24.36 g/ 14 g/mol.

=1.74 mol.

Given mass of silver= 62,64 g.

Molar mass of silver Ag=107.87 g/mol

Number of mols=62.64 g ÷ 107.87 g/mol.

=0.58 mol.

Ratio of number of mol of N and number of mols of Ag = 1.74 mol / 0.58 mol

=3:1

Hence, empirical formula is AgN₃.