What is the limiting reactant in the following reaction if 1.63g of NH3 is reacted with 3.47g of Cl2 ?
4 NH3 + 3 Cl2 → 3 NH4Cl + NCl3
a. Cl2
b. NCI3
c. NH4Cl
d. NH3​

Answer:

Explanation:

This question is about nuclear reactions. (a) (i) Define the term unified atomic mass unit. [1]. 1/12th mass of an atom of carbon-12.

The nuclear reaction can be written as: Mg2512+He42→H11+XAZ. where. A is the mass number and; Z is the atomic number of the new nuclide, X.

The mass defect for an isotope was found to be 0.410 amu/atom. Calculate the binding energy in kJ/mol of atoms. (1 J = 1 kg m2/s2): (a) 3.69 x 1010

Answer:

42.9 h

Explanation:

From the question given above, the following data were obtained:

Original amount (N₀) = 100%

Amount remaining (N) = 25%

Time (t) = 85.8 h

Half-life (t½) =?

Next, we shall determine the number of half-lives that has elapse. This can be obtained as follow:

Original amount (N₀) = 100%

Amount remaining (N) = 25%

Number of half-lives (n) =?

N = 1/2ⁿ × N₀

25 = 1/2ⁿ × 100

Cross multiply

25 × 2ⁿ = 100

Divide both side by 25

2ⁿ = 100/25

2ⁿ = 4

Express 4 index form with 2 as the base

2ⁿ = 2²

n = 2

Thus, two half-lives has elapsed.

Finally, we shall determine the half-life of the of the isotope. This can be obtained as follow:

Time (t) = 85.8 h

Number of half-lives (n) = 2

Half-life (t½) =?

n = t / t½

2 = 85.8 / t½

Cross multiply

2 × t½ = 85.8

Divide both side by 2

t½ = 85.8 / 2

t½ = 42.9 h

Thus, the half-life of the of the isotope is 42.9 h

1. The products in this reaction are AlCl₃(aq) and H₂(g).

2. The reactants in this reaction are Al(s) and HCl(aq).

3. The balanced equation is 2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)

4. This is a single displacement reaction.

5. The symbols indicate the physical states of the reactants and products.

A single displacement reaction, also known as a single replacement reaction, is a type of chemical reaction in which an element or ion in a compound is replaced by another element or ion.

In a single displacement reaction, one reactant is usually an element in its elemental state, while the other reactant is a compound.

In the given reaction,  "Al(s)" means solid aluminum, "HCl(aq)" means hydrochloric acid dissolved in water (aq means aqueous), "AlCl₃(aq)" means aluminum chloride dissolved in water, and "H₂(g)" means hydrogen gas.

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Answer:

Global warming is causing global mean sea level to rise in two ways. First, glaciers and ice sheets worldwide are melting and adding water to the ocean. ... A third, much smaller contributor to sea level rise is a decline in the amount of liquid water on land—aquifers, lakes and reservoirs, rivers, soil moisture.

Explanation:

Answer:

It has caused sea levels to rise and caused glaciers to melt.

Explanation:

Because glaciers and ice caps are melting rapidly and they store about 1.7% all of Earth's water, causing sea levels to rise.

Answer:

a. NH3

b.

c. NaCl

d.

e. HCl

f.

Answer:

Protons are one of the basic atoms.

Explanation:

Proton's charge: Positive (+)

Proton's location: Usually in the nucleus with neutrons

Proton's mass: 1.67262 × 10⁻²⁷ kg

Answer:

Location: nucleus

Charge: positive

Mass: one amu

Explanation:

Answer:

What's the rest of the question

Explanation:

Answer:

Question not very specific, but here is an answer you might be looking for. Density of object at 2 degrees C, 0.99997 g/mL. Hope it IS the answer you are looking for!

Explanation:

Answer:

0.579 moles

Explanation:

Moles = 23.53/40.64

= 0.5789 moles

The molar mass of compound of magnesium chloride is 95.211 g/mole while that of ammonium sulfate is 132.14 g/mole.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

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Any object which have less density than the mercury will float in it and which have higher density will sink on it. Here, gold has higher density than  mercury. Thus it will sink on mercury.

Density of a substance is the measure of its mass per volume. Thus it says about how much denser the substance is in a specific volume. The ratio of density of an object to the density of  water is called specific gravity.

The density of mercury is 13.4 g/ml. Any object which is less dense than mercury will float on its surface whereas, objects which have higher density than mercury will sink on it.

The density of gold is 79.3 g/ml. All other given metals iron, lead and copper have a density less than that of mercury. Hence the substance which sink on mercury is gold. Option Dis correct.

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The synthesis of ch3oh(g) from co(g) and h2(g). The value of kc for the reaction at 483 k is 14.5. a 1.0 mol sample of co(g) and a 1.0 mol sample of h2 (g) are pumped into a rigid. [CH3OH] = 14.5 M is true at equilibrium.

The synthesis of CH3OH(g) from CO(g) and H2(g) is represented by the following equilibrium equation:

CO(g) + 2H2(g) <---> CH3OH(g)

The equilibrium constant (Kc) for this reaction at a temperature of 483 K is 14.5. This means that at equilibrium, the concentration of CH3OH(g) in the reaction vessel will be 14.5 times greater than the combined concentrations of CO(g) and H2(g). If a 1.0 mol sample of CO(g) and a 1.0 mol sample of H2(g) are pumped into a rigid, previously evacuated 2.0 L reaction vessel at 483 K, the initial concentrations of CO(g) and H2(g) will be 0.5 mol/L for each gas. The initial concentration of CH3OH(g) will be zero, as the reaction has not yet reached equilibrium. At equilibrium, the concentrations of CO(g), H2(g), and CH3OH(g) in the reaction vessel will be in a ratio of 1:2:1, as indicated by the coefficients in the equilibrium equation. The concentration of CH3OH(g) at equilibrium will be 14.5 times greater than the combined concentrations of CO(g) and H2(g), or 14.5 x (0.5 mol/L + 0.5 mol/L) = 14.5 x 1.0 mol/L = 14.5 mol/L.

Based on these calculations, the correct statement is:

(c) [CH3OH] = 14.5 M

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Answer:

the density of the helium gas would be approximately 0.369 g/L when the balloon is placed in the freezer at -10°C and a pressure of 2.0 atm.

Explanation:

To calculate the density of helium gas in the balloon after it is placed in the freezer at -10°C and a pressure of 2.0 atm, we can use the ideal gas law and the relationship between density, molar mass, and molar volume.

First, let's find the initial molar volume of the helium gas using the given conditions:

PV = nRT

Where:

P = pressure = 1.0 atm

V = volume = 0.75 L

n = number of moles = 0.0303 mol

R = ideal gas constant = 0.0821 L·atm/(mol·K)

T = temperature in Kelvin

To convert Celsius to Kelvin, we add 273.15:

T = 30°C + 273.15 = 303.15 K

Using the ideal gas law, we can calculate the initial molar volume:

V_initial = (n * R * T) / P

V_initial = (0.0303 mol * 0.0821 L·atm/(mol·K) * 303.15 K) / 1.0 atm

V_initial ≈ 0.754 L

Next, we can calculate the molar mass of helium (He) using the atomic mass of helium:

Molar mass of He = 4.003 g/mol

Now we can calculate the initial density of the helium gas in the balloon:

Initial density = (mass of helium gas) / (volume of helium gas)

Initial density = (0.0303 mol * 4.003 g/mol) / 0.754 L

Initial density ≈ 0.161 g/L

Now let's find the final density of the helium gas when the balloon is placed in the freezer at -10°C and a pressure of 2.0 atm.

We will use the ideal gas law again with the new conditions:

P_final = 2.0 atm

T_final = -10°C + 273.15 = 263.15 K (converted to Kelvin)

To find the final molar volume, we rearrange the ideal gas law equation:

V_final = (n * R * T_final) / P_final

V_final = (0.0303 mol * 0.0821 L·atm/(mol·K) * 263.15 K) / 2.0 atm

V_final ≈ 0.328 L

Finally, we can calculate the final density of the helium gas:

Final density = (mass of helium gas) / (volume of helium gas)

Final density = (0.0303 mol * 4.003 g/mol) / 0.328 L

Final density ≈ 0.369 g/L

Answer:

the answer is your a awesome person

Baking soda can be used to cure acidity as it a base and has a pH value of around 8-9.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

9.62moles of NH₃

Explanation:

Given parameters:

Number of moles of nitrogen  = 4.81moles

Unknown:

Number of moles of  NH₃ = ?

Solution:

To solve this problem, we need to establish a balanced reaction equation:

            N₂  +  3H₂  →  2NH₃

Now, we can solve the problem by working from the known to the unknown.

          1 mole of N₂ produced 2 moles of NH₃

         4.81moles of N₂ will produce 2 x 4.81  = 9.62moles of NH₃

Answer:

i think its D

Explanation:

In order to get maximum accuracy, student should take average of results from all four trials.

Accuracy  in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

Accuracy in case of instruments  is neglected up  to ±0.5 percent.Accuracy of measurements can be increased by taking multiple measurements and taking into account human errors.

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The energy per mole of the photon is 4.97 * 10^-47 J/mol.

We know that energy has to do with the product of the Plank's constant as well as the frequency of the wave. In this case, we know that;

E = hf

E = energy of the wave

h = Plan's constant

f = frequency of the wave

E = 6.6 * 10^-34 J s * 4.53 x 10^10 s-1

E = 2.99 * 10^-23

Given that one mole does contain 6.02 * 10^23 molecules then;

Energy per mole =  2.99 * 10^-23/6.02 * 10^23

= 4.97 * 10^-47 J/mol

The photons have 4.97 * 10^-47 J/mol of energy.

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Na>Mg>Zn>Fe is the proper sequence of reactivity. Caesium is both the most electropositive element and the most reactive metal in the periodic table.

According to their reactivity, metals are arranged as follows: K > Na > Ca > Mg > Al > Zn > Fe > Ni > Sn > Pb > H > Cu > Ag > Au. In light of this, the proper sequence is Fe > Ni > Sn > Pb > H > Cu > Au.

A chart listing metals in decreasing order of reactivity is called the metals reactivity series. A metal generally reacts with other chemicals more forcefully the more reactive it is. the easier it is for positive ions to form when losing electrons (cations)

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In keeping with the general trends, K-Br will have the smallest bond energy. The bond energy refers to the energy that keeps the atoms in a bond together.

Bond energy is the energy that is required to hold atoms together in a bond. This energy must also be supplied when the atoms are to be separated.

We have the bond energies of each of the bons in the question, we have to note that the the smallest value of bond energy is Na-Br hence in keeping with the general trends, K-Br will have the smallest bond energy.

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Answer:

Chemistry B Semester Exam 5/4/2023

1. Cs-Br

2. K-C is ionic, and C-O is polar covalent

3. All molecules are in constant motion, so they all have some kinetic energy.

4. The reaction between substances A and B has a lower activation energy than the reaction between substances B and C.

5. More bond energy is absorbed on the reactants side than is released on the products side.

6. an exothermic reaction

7. Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.

8. Heat must be released by the products in order to convert from the reactants.

9. Cooling a purple solution will turn it pink.

10.  Both are flexible, but one conducts electricity while the other insulates.

11. high pressure, high-temperature water extraction

12. steel + vanadium for shock absorption

13. 15

14. the number of atoms, type of elements, and mass of reactants and products are equal.

15. 64 grams

16. 1.503x10^23

17. The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same.

18. The plastic balls are a good representation of neutrons, but there is no splitting of nuclei as happens in fission.

19. beta minus decay

20. alpha decay

21. Greenhouse gases have more than two atoms, allowing them to vibrate and release radiation, warming the atmosphere.

22. cause: acid rain, consequence: destruction of crops

23. toxic bacteria in the water supply

24. it reaches hard to get to oil and gas deposits.

Answer:

First is battery acid with a pH of 1, second is stomach acid with a pH of 1.5-3.5 (depends), third is antacid with a pH of 7, fourth is baking soda with a pH of 9, and finally, fifth is household ammonia with a pH of 11.

Here is a picture of the pH levels to better help you understand.

Answer:

b

Explanation:

0.167L

In order to know how much L of the 3M NaOH solution would you need, we will simply set up an equal proportion solution expressed as;

C1 and C2 are the concentration of the solutions

V1 and V2 are the volumes of the solutions

Given the following parameters;

C1 = 1M

V1 = 500mL

C2 = 3M

V2 = ?

Substitute the given parameters into the formula above to get the required litre of solution needed.

Divide both sides by 3:

Converting to litres

Since 1mL = 0.001L

166.67mL = x

Cross multiply

Hence the amount of L of the 3M NaOH solution would you need is 0.167L

Answer:

H2O is the name of this molecule and it is water

Answer:

determining the number of atoms in a jar of liquid

Explanation:

In determining the number of atoms that makes up a substance, the number  of moles is very essential.

The mole is the convenient unit of quantity of particles. It can be likened to a quantity of things in everyday life like a dozen, a score and a gross.

So, to find the number of atoms, we must know the number of moles.

Answer:

3rd choice

Explanation:

I got it correct

Answer:

- hide from predators

- in search of food

- shelter and protection

thenks and mark me brainliestt :))

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:

to the right (products side)

Explanation:

The equilibrium constant K describes the ratio between the concentration of products and reactants at equilibrium. For a general reaction:

a A + b B → c C + d D

The equilibrium constant expression is:

\(K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }\)

A low value of K indicates that the concentration of products (C and D) is low in relation with the concentration of reactants (A and B).

Conversely, a high value of K indicated that the concentration of products is high compared with the concentration of reactants.

Since K = 6.4 × 10⁹ is a high value, the concentration of products is higher than the concentration of reactants at equilibrium. Thus, the position of the equilibrium is favored to the right.

People refuse to answer questions from authorized Stats SA officials because they don't want to reveal confidential information.

An official Stats is an official who has the function of asking citizens for different information in order to establish general statistics for all citizens.

Some people refuse to answer questions out of mistrust, because they don't want to share personal information.

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Answer:

Explanation:

The end product of Photosynthesis is glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.