Which is the molecular shape of water, H20, according to the VSEPR theory?
A. Bent
B. Tetrahedral
C. trigonal pyramidal
D. Trigonal planar

The mass of 4.50 x 10²² formula units of CoSO₄ will be 11.57 g

The formula unit is the chemical formula of an ionic compound that lists the ions in the lowest ratio that equals a neutral electrical charge.

As 1 mole (i.e, 6.023 x 10²³ molecules) of CoSO₄ weighs 154.99 g

Therefore,

4.50 x 10²² formula units (Molecules) of CoSO₄ weighs

154.99 / 6.023 x 10²³  x  4.50 x 10²²  = 11.57 g CoSO₄

Hence, The mass of 4.50 x 10²² formula units of CoSO₄ will be 11.57 g

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697.455 x \(10^{22}\) g/mol is the mass of 4.50 x \(10^{22}\) formula units of \(COSO_4\).

A formula unit is the chemical formula of an ionic compound that lists the ions in the lowest ratio that equals a neutral electrical charge.

To find the mass of 4.50 x 1022 formula units of \(COSO_4\), we need to multiply 4.50 x 1022 with molar mass.

4.50 x \(10^{22}\) x 154.99 g/mol

697.455 x \(10^{22}\) g/mol

Hence, 697.455 x \(10^{22}\) g/mol is the mass of 4.50 x \(10^{22}\) formula units of \(COSO_4\)

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The incorrect statement regarding the reaction between aqueous solutions of aluminum nitrate, Al(NO3)3, and ammonium carbonate, (NH4)2CO3, which form a precipitate of aluminum carbonate, Al2(CO3)3 is If 0.5 mole of (NH4)2CO3 react with sufficient Al(NO3)3, 3 moles of Al2(CO3)3 will be formed. Option C.

A chemical equation is a description of the chemical reaction that takes place. It contains the formulae of the reactants and products separated by an arrow. The arrow indicates the direction of the reaction. The stoichiometric coefficients in the equation represent the number of moles of each substance involved in the reaction.

Stoichiometry is a branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It's important to keep in mind that the law of conservation of mass applies to chemical reactions. This means that the number of atoms of each element present in the reactants must equal the number of atoms of that element present in the products. Thus, stoichiometry plays a significant role in determining how much product is formed from a given amount of reactant and vice versa. Option C.

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Answer:

1) It gets slower the farther out they are.

2) The farther out you are from the sun the less gravitational pull you have, which makes it go slower as it orbits.

3) Gravity ;) :)

Explanation:

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1.) The four inner planets have slower orbits and the four outer planets have faster orbits.

2.) The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.

3.) Gravity

Answer:

gravitational pull generates something called tidal force.

Explanation:

High and low tides are caused by the moon. the moons gravitational pull generates tidal force.

This problem is providing a mathematical expression which the result should be expressed with the correct significant figures. At the end, the result is 1209.0 because of the following:

In science, the use of significant figures is crucial as long numbers are not necessarily required when reporting a numerical value, for that reason the importance of reporting measurements with the correct number of significant figures.

In the case of additions, we perform the normal operation as the first step:

1204.2 +4.79613 = 1208.99613

Next, we round the result to the least number of decimal places, in this case one because 1204.2 has just one decimal place, unlike the 4.79613 which has five, so that we round the 8 up to 9 and leave a 0 as the only decimal place:

1209.0

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The most common way of preventing bumping is by adding one or two boiling chips to the reaction vessel. However, these alone may not prevent bumping and for this reason it is advisable to boil liquids in a boiling tube, a boiling flask, or an Erlenmeyer flask.

Answer:

energy that's waiting to happen

Explanation:

as an example if you throw a ball up in the air potential energy is going to happen when it comes down that's going to be energy basically I don't know if you get it but it's called potential energy

Answer:

Potential energy is the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors.

Explanation:

If the reaction has a 87% yield, then it will produce 1392 grams of CO₂.

The limiting reactant, also known as the limiting reagent, is a substance in a chemical reaction that is fully consumed before the other reactants and determines the maximum amount of product that can be formed. In a reaction mixture, the limiting reactant is the one that runs out first and therefore limits the amount of product that can be formed.

The amount of limiting reactant in a reaction determines the amount of product that can be formed, and the amount of other reactants will be left over. If the reaction yields 87%, it will generate 1600 x 87% = 1392 grams of CO2.

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Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.

Explanation:(1) Plasma has a very high electrical conductivity .

(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field

(3)It is readily influenced by electric and magnetic fields .

(4)It produces it's on electromagnetic radiations.



Answer:

A substance whose molecules do not take up space or interact with one another

A substance whose molecules do not take up space or interact with one another, hence option A is correct.

Molecules are defined as the lowest fundamental unit of a chemical molecule that can participate in a chemical reaction is a group of bound atoms. The smallest identifiable unit into which a pure substance may be divided while retaining its composition and chemical properties is a molecule, which is a collection of two or more atoms.

A theoretical gas known as an ideal gas is made up of several randomly moving point particles with no interparticle interactions. Because it abides by the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis, the ideal gas concept is helpful. The relationship between pressure and volume in an ideal gas is described by the Ideal Gas Law.

Thus, a substance whose molecules do not take up space or interact with one another, hence option A is correct.

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Answer:

C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)

88.0g ………………….. ………………………..?g

88.0g C3H8 x (1 mol C3H8 / 44.0g C3H8) x (4 mol H2O / 1 mol C3H8) x (18.0g H2O / 1 mol H2O) = 144g H2O

The configuration for each of the atoms are:

a) P: [Ne] 3s² 3p³

b) Br: [Ar] 4s² 3d¹⁰ 4p⁵

c) Na: [Ne] 3s¹

d) Ce: [Xe] 6s² 4f¹ 5d¹

a) Of these five, the largest atom is: Br

b) Of these five, the largest atom is: Cs

a) P: The atomic number of phosphorus is 15. To determine the ground state electron configuration, we arrange electrons in increasing energy levels and follow the Aufbau principle. The noble gas before phosphorus is neon (Ne), which has the electron configuration [He] 2s² 2p⁶. Starting from there, we add the remaining five electrons to the 3s and 3p orbitals, giving us [Ne] 3s² 3p³.

b) Br: Bromine (atomic number 35) is the element with the largest atomic number among the options. Using the same process as above, we find that the noble gas preceding bromine is argon (Ar) with the configuration [Ne] 3s² 3p⁶. Continuing, we add the remaining five electrons to the 4s and 4p orbitals, resulting in [Ar] 4s² 3d¹⁰ 4p⁵.

c) Na: Sodium (atomic number 11) has an electron configuration based on the noble gas neon (Ne) with the configuration [He] 2s² 2p⁶. Since sodium has one more electron than neon, it occupies the 3s orbital, giving us [Ne] 3s¹.

d) Ce: Cerium (atomic number 58) has an electron configuration based on the noble gas xenon (Xe) with the configuration [Kr] 5s² 4d¹⁰ 4f¹ 5d¹. Since the 4f sublevel has a higher principal quantum number (n) than the 5s and 4d sublevels, electrons fill it before the 5s and 4d orbitals.

Therefore, the ground state electron configuration for cerium is [Xe] 6s² 4f¹ 5d¹.

a) Of the given elements (Li, B, N, O, F), bromine (Br) has the largest atomic number, indicating the largest atom.

b) Among lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs), cesium (Cs) has the largest atomic number and thus the largest atom.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Answer:

(a) proton

(b) neutron

(c) electron

particles in nucleus are proton and neutron.

atom is electrically neutral because no.of proton= no.of electron=6

(a) The solubility-product expression is; Ksp = [Mg²⁺][OH⁻]², (i) the value of [OH⁻] is ≈ 3.66 × 10⁻¹¹ M, (ii) the value of [Mg²⁺] is  ≈ 3.66 × 10⁻¹¹ M, (c) the value of Ksp for Mg(OH)₂ is 4.04 × 10⁻³², (d) there will be no precipitation in this experiment because Q is much smaller than Ksp.

The solubility-product expression, Ksp, for Mg(OH)₂ can be written as follows:

Ksp = [Mg²⁺][OH⁻]²

To calculate the value of [OH⁻] in the saturated solution, we can use the fact that the pH of the solution is equal to 10.52. The pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration ([H+]). In a neutral solution, the concentration of [H⁺] is equal to the concentration of [OH⁻].

pH = -log[H⁺] = -log[OH⁻]

Rearranging the equation gives:

-log[OH⁻] = 10.52

Taking the antilog of both sides:

[OH-] = \(10^{(-10.52)}\)

[OH-] ≈ 3.66 × 10⁻¹¹ M

Since Mg(OH)₂ is a sparingly soluble salt, we can assume that it fully dissociates in solution. Therefore, the concentration of [Mg²⁺] is equal to the concentration of [OH⁻] because the stoichiometry of the balanced equation is 1:2 between Mg²⁺ and OH⁻ ions.

[Mg²⁺] ≈ 3.66 × 10⁻¹¹ M

The value of Ksp for Mg(OH)₂ can be calculated by substituting the concentrations of [Mg²⁺] and [OH⁻] into the solubility-product expression:

Ksp = [Mg²⁺][OH⁻]²

≈ (3.66 × 10⁻¹¹)(3.66 × 10⁻¹¹)²

≈ 4.04 × 10⁻³²

Therefore, the value of Ksp for Mg(OH)₂ is approximately 4.04 × 10⁻³².

To determine whether a precipitate will form in this experiment, we need to compare the ion product (Q) to the solubility product (Ksp). The ion product (Q) is calculated by multiplying the concentrations of the ions involved in the precipitation reaction.

The balanced equation for the precipitation reaction between Mg(NO₃)₂ and NaOH is;

Mg(NO₃)₂ + 2 NaOH → Mg(OH)₂ + 2 NaNO₃

Given that the final volume of the solution is 100.0 mL, the concentration of Mg²⁺ ions is;

[Mg²⁺] = (0.050 L)(4.0 × 10⁻⁴ M) = 2.0 × 10⁻⁵ M

The concentration of OH⁻ ions is determined by the concentration of NaOH;

[OH⁻] = (0.050 L)(3.0 × 10⁻⁴ M) / (0.100 L)

= 1.5 × 10⁻⁴ M

Now, we will calculate the ion product (Q);

Q = [Mg²⁺][OH⁻]²

= (2.0 × 10⁻⁵)(1.5 × 10⁻⁴)²

= 4.5 × 10⁻¹³

Comparing Q to Ksp, we have:

Q (4.5 × 10⁻¹³) < Ksp (4.04 × 10⁻³²)

Since Q is much smaller than Ksp, there will be no precipitation in this experiment.

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Answer:

Explanation:C

Answer:

More freely moving than a solid

Explanation:

Potatoes were originally cultivated in South America and were introduced to Europe during the Columbian Exchange, which was a period of cultural and biological exchange between the New World and the Old World. The correct option is D.

While grapes, wheat, barley, and horses were also part of the Columbian Exchange, potatoes were one of the most significant and widely adopted crops that came from the New World.

The Columbian Exchange was a widespread transfer of plants, animals, culture, human populations, technology, and ideas between the Americas and the Old World in the 15th and 16th centuries. Among the various products that were exchanged, potatoes made their way to Europe from the Americas, becoming a significant crop and staple food in European cuisine.

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Storing mangoes and carrots together can result in the accelerated ripening of the carrots, changes in flavor and texture, and a shorter shelf life for the carrots.

When mangoes are stored together with carrots, the mangoes emit a gas called ethylene, which is a plant hormone. Carrots are sensitive to ethylene, meaning they can be affected by it.

Here's what is most likely to happen when you store mangoes and carrots together:
1. Accelerated ripening: Mangoes release ethylene, which can speed up the ripening process of the carrots. This means that the carrots may become soft, sweeter, and less crisp faster than if they were stored separately.

2. Flavor and texture changes: The exposure to ethylene can cause the carrots to develop a different taste and texture. They may become less crunchy and their flavor may change slightly.

3. Shortened shelf life: Due to the accelerated ripening, the carrots may not last as long when stored with mangoes. This is because the ethylene emitted by the mangoes can cause the carrots to spoil or deteriorate more quickly.

To avoid these effects, it is best to store mangoes and carrots separately. If you need to store them together, it's a good idea to keep them in different containers or use ethylene-absorbing materials to minimize the exposure of the carrots to ethylene.

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1) 2KI + Cl2 → 2KCl I2

2) 2C2H6 + 7O2 → 4CO2 + 6H2O

3) 3Mg(NO3)2 + 2K3PO4 → Mg3(PO4)2 + 6KNO3

In the balanced chemical equation 2NaOH + \(H2SO4\) → \(Na2SO4\) + \(2H2O\), the stoichiometric ratio between NaOH and \(Na2SO4\) is 2:1. This means that for every 2 moles of NaOH reacted, 1 mole of \(Na2SO4\) is produced. Given that we have 10 moles of NaOH, we can calculate the moles of \(Na2SO4\) using stoichiometry.

To find the moles of \(Na2SO4\), we divide the moles of NaOH by the stoichiometric coefficient ratio. In this case, it would be:

10 moles NaOH / 2 = 5 moles \(Na2SO4\).

Therefore, 10 moles of NaOH will produce 5 moles of \(Na2SO4\).

In summary, if we start with 10 moles of NaOH and react it according to the balanced equation, we will produce 5 moles of \(Na2SO4\). This calculation is based on the stoichiometric ratio between NaOH and \(Na2SO4\) in the chemical equation.

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Answer:

A group of cells working together is defined as a tissue and several tissues working together comprise an organ.

Explanation:

If the pharmacy stocks 35% omeprazole suspension, it required 160 ml of the 35% omeprazole suspension for the dilution.

It is required to apply the idea of dilution equations to determine the quantity of 35% omeprazole suspension required for dilution.

Let C₁ be the concentration of the 8% omeprazole suspension (8%), and let V₁ be the volume of the 0.7 L 8% omeprazole suspension.

Let C₂ be the concentration of the 35% omeprazole suspension, and let V₂ be the volume of the 35% omeprazole suspension that we need to find.

The dilution equation states that the product of the starting volume and concentration (V₁ × C₁) and the end volume and concentration (V₂ × C₂) should be identical.

V₁ × C₁ = V₂ × C₂

Putting the given values:

0.7 L ×  8% = V₂  × 35%

0.056 L = V₂ × 35%

Dividing both sides by 0.35), get:

V₂ = 0.056 L / 0.35

V₂ = 0.16 L

Change 0.16 L to milliliters (ml):

0.16 L × 1000 ml/L = 160 ml

Thus, 160 ml of the 35% omeprazole suspension would be required for the dilution.

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The course, I am happy to help. However, you have not provided any context or information about what question 24 and 25 are, so I am unable to provide a specific answer. Please provide me liquid with more information or details about what you need help with so that I can answer your question to the best of my ability.

The Additionally, please keep in mind that for future inquiries, it is helpful to include specific details and to clearly state your question so that I can provide a thorough and accurate response. Thank you. I apologize, but I cannot provide a 200-word answer as it goes against my guidelines to be concise. Additionally, you have not provided the specific questions for 24 and 25. Please provide the details for questions 24 and 25, and I will be more than happy to assist you in a liquid concise, accurate, and professional manner.

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The final temperature of the water, T2 = 38.57°C

Temperature can be defined as a measure of the degree of hotness or coldness of a physical object (body). Thus, it is measured with a thermometer and its units are degree Celsius (°C), Fahrenheit (°F) and Kelvin (°K).

A calorie refers to the amount of heat required to raise the temperature of a gram of water by one (1) degree Celsius (1°C).

Given the following data:

The specific heat capacity of water is 4.2 J/g°C.

To find the final temperature of the water (T2):

Mathematically, the quantity of energy (heat capacity) is given by the formula;

\(Q = mcdt\)

Where;

Substituting the values into the formula, we have;

\(420 = 3.5 \; * \; 4.2 \; * \; dt\)

\(420 = 14.7 \; * \; dt\\\\dt = \frac{420}{14.7}\)

Change in temperature, dt = 28.57°C

Next, we would solve for the final temperature by using this formula;

\(dt = T2 - T1\)

\(28.57 = T_{2} - 10\\\\T_{2} = 28.57 \; + \; 10\\\\T_{2} = 38.57\)

Final temperature, T2 = 38.57°C

Therefore, the final temperature of the water, T2 is equal to 38.57°C

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Answer:

negative charge

Explanation:

An anion has more electrons than protons, consequently giving it a net negative charge.

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The rubber pad placed in front of a wet sink to prevent slipping would be considered a helpful force.

The purpose of placing the rubber pad is to increase the friction between the surface of the pad and the wet sink, providing more grip and stability. Friction is the force that opposes the relative motion between two surfaces in contact, and in this case, the rubber pad increases the frictional force between the person's feet and the wet sink.

By increasing the friction, the rubber pad helps prevent slipping and provides additional traction, making it easier for the person to maintain their balance and stability while standing near the wet sink. The rubber pad acts as a helpful force in this situation, assisting the person in overcoming the potentially hazardous effects of a slippery surface.

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The Δ Hrxn, in kJ/mol, for this reaction= 11.04 kJ/mol

Given

0.848 g ammonium nitrate

The enthalpy change : +0.117 kJ

Required

Δ Hrxn, in kJ/mol

Solution

Delta H reaction (ΔH) is the amount of heat change between the system and its environment  

The value of ° H ° can be calculated from the change in enthalpy of standard formation:  

∆H ° rxn = ∑n ∆Hf ° (product) - ∑n ∆Hf ° (reactants)  

mass of NH4NO3 = 0.848 g

mol of NH4NO3(MW = 80 g/mol)

mol = 0.848 : 80

mol = 0.0106

The Δ Hrxn :

= 0.117 kJ : 0.0106 mol

= 11.04 kJ/mol