The oxygen in water behaves as though it’s , and the hydrogens behave as though they’re

Explanation:

When the water evaporates from your clothes, it will "hang around" around it. If there is little or no air movement, this means that the air surrounding the fabric is saturated with moisture, which means it will not evaporate more. The breeze will move the moisture-saturated air away from the fabric, until more water evaporates.

(a) Sketch the H 2 - ion's molecular orbitals and create an energy-level diagram for it. Indicate the ion's electron configuration using its MOs.

(b) The image below shows how two electrons will be positioned in a bonding molecular orbital. As a result, the electron configuration of the molecular orbitals will be 1 s 2, 1 s 1, and 1 s 2 sigma 1s*1.

(c) Bond order for H2 is 1/2 (2-0) = 1, indicating that there is only one bond in H2. The orbital for antibonding is void. H2 is a stable molecule as a result.

(d) Assume that an electron in the ion transfers from a lower-energy to a higher-energy molecular orbital as a result of the ion being activated by light.

According to the molecular orbital hypothesis, every atom has a tendency to group together to create molecular orbitals. As a result of this configuration, electrons can be found in a variety of atomic orbitals and are frequently linked to diverse nuclei.  Similar to how the energy states of atomic orbitals are filled, the electrons of molecules fill the new energy states of molecular orbitals.

A molecular orbital, which is used in chemistry, is a mathematical function that describes the position and wave-like activity of an electron in a molecule. Calculations involving chemical and physical characteristics, such as the likelihood of discovering an electron in a certain area, can be made using this function.

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The half-life of Uranium-235 is 710 million years. To determine the time required for the radioactivity of the stored Uranium-235 to drop below 0.1% of the original level, we can use the equation N = N_o * (1/2)^(t/t_(1/2)), where N is the number of radioactive atoms remaining after time t, N_o is the initial number of radioactive atoms, t is the time elapsed, and t_(1/2) is the half-life of the substance.

Given that the final radioactivity level is 0.1% or 0.001, we substitute these values into the equation:

0.001 = 1 * (1/2)^(t/710,000,000)

Taking the logarithm of both sides with base 1/2:

log_(1/2) 0.001 = t/710,000,000

Simplifying further:

log_(1/2) 0.001 = log 0.001 / log 1/2

We can now solve for t:

t = 710,000,000 * (log 0.001 / log 1/2)

Evaluating this expression gives:

t ≈ 2.11 x 10^9 years

Therefore, it will take approximately 2.11 billion years for the radioactivity of the stored Uranium-235 to drop below 0.1% of the original level.

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It takes about 15.02 seconds for the drug concentration to reach 0.24 g/cm3.

Drug concentration after 10 seconds:

C(t)= 0.2(1 + 3e^-0.3t)

Given t = 10 seconds

C(10) = 0.2 (1 + 3e^-0.3*10)≈ 0.75 g/cm32.

Rate of change between 30 and 45 seconds (g/cm3/sec)

Rate of change of C with respect to t is given by d

C/dt = -0.18e^-0.3t

When t = 30,dC/dt = -0.18e^-0.3*30 = -0.0104 g/cm3/sec

When t = 45,dC/dt = -0.18e^-0.3*45 = -0.0015 g/cm3/sec3.

Time taken for drug concentration to reach 0.24 g/cm3

To find the time it takes for the drug concentration to reach 0.24 g/cm3,

we solve the equation C(t) = 0.24 g/cm3 for t.

C(t) = 0.2 (1 + 3e^-0.3t)0.24

      = 0.2 (1 + 3e^-0.3t)1.2

      = 1 + 3e^-0.3t0.2

      = 3e^-0.3tln(0.2/3)

      = -0.3tln(0.2) - ln(3)

     = -0.3tln(3) + ln(0.2)

     = 0.3tApproximately, t

    ≈ 15.02 seconds,

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Answer:

The reactants are on the left of the arrow, the products are on the right.

Explanation:

Reactants are the substances that exist before the chemical reaction takes place. When writing a chemical reaction or equation, they are found on the left of the arrow. They react to form new substances, which are known as the products. The products are found to the right of the arrow in the reaction.

Answer:

21

Explanation: 2+1=21

Answer:

Tectonic plates

Explanation:

All the natural disasters like earthquakes, volcanoes and geysers appear throughout the region of New Zealand because of the movement of tectonic plates underneath the surface. New Zealand rests on the edges of two tectonic plates including the Pacific and the Australian plates.

The given statement "The molar enthalpy of sublimation of a given substance can be determined if its enthalpies of fusion and vaporization are known" is true.

The molar enthalpy of sublimation of a substance can be determined if its enthalpies of fusion (melting) and vaporization (boiling) are known. The enthalpy of sublimation refers to the energy required to change a substance from the solid phase directly to the gaseous phase, bypassing the liquid phase.

The enthalpy change during sublimation can be calculated by considering the enthalpies of fusion and vaporization. When a substance undergoes sublimation, it first requires energy to melt from the solid phase to the liquid phase (enthalpy of fusion) and then additional energy to vaporize from the liquid phase to the gaseous phase (enthalpy of vaporization). The sum of these two enthalpies represents the overall energy change during sublimation.

Therefore, by adding the enthalpy of fusion and the enthalpy of vaporization, one can determine the molar enthalpy of sublimation for a given substance.

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The law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

In other words, as the quantity of one good increases, the individual is willing to sacrifice fewer units of the other good to obtain an additional unit of the first good. This reflects a diminishing rate of substitution between the two goods.

The reason why the law of diminishing marginal rate of substitution suggests that isoquants must be bent toward the origin is rooted in the concept of diminishing marginal utility. As more units of a particular input (e.g., labor or capital) are added while holding other inputs constant, the additional output gained from each additional unit of the input will decrease. This diminishing marginal productivity leads to a decreasing MRS.

When isoquants (which represent different combinations of inputs that produce the same level of output) are bent toward the origin, it reflects the fact that as more of one input is used, the amount of the other input that needs to be substituted decreases. This bending signifies the diminishing MRS and captures the idea that a larger quantity of one input can be substituted for a smaller quantity of the other input to maintain the same level of output.

Overall, the law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

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When ice is heated at a constant pressure of 0.00512 atm, it will melt.

The melting point of ice at standard pressure (1 atm) is 0 °C or 32 °F.

The process of melting involves the conversion of a solid into a liquid. When the temperature of ice is increased, its molecules begin to vibrate more vigorously, and the forces between them become weaker. This results in the breaking of the bonds between the molecules of ice and the conversion of ice into water.

At constant pressure, heating causes the temperature of a substance to increase, and when a solid like ice is heated, it will melt and turn into a liquid. The melting point of any substance is dependent on its pressure. As a result, if the pressure of the environment is different from that of the standard pressure, the melting point of the substance will also differ.

Hence, when ice is heated at a constant pressure of 0.00512 atm, it will melt into water. This process will continue until the water reaches its boiling point, which is when it will transform into water vapor.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer: A. The variable c

============================================

Explanation:

Q = heat transferred

m = mass

c = specific heat

\(\Delta T\) = delta T = change in temperature

The empirical formula for barium azide is BaN6 as it is a barium salt of hydrazoic acid.

The empirical formula of a chemical compound in chemistry is the simplest whole number ratio of atoms present in the compound.

Barium azide, with the formula Ba(N3)2, is an inorganic azide. It is a hydrazoic acid barium salt. It is explosive, as are most azides.

Thus, it can be implicated that the empirical formula for barium azide will be BaN6.

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Answer:

2. Periods

Explanation:

The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups. ... Elements in the periodic table are organized according to their properties.

Answer:

3846g of Carbon tetrachloride is in the chemical equation.

Explanation:

The Balanced equation is :

   CH4 + 4CL2 -> CCL4 + 4HCL

Converting grams to moles ;

  Moles of CL2 = Mass / Molar mass

  Molles of CL2 = 709.0g/70.906g/mol => 10 moles

  Moles  of CCL4 = Moles of CL2 / 4

  Moles of CCL4 = 10 moles/ 4 => 2.5 moles

Converting moles of CCL4 to grams:

 Mass of CCL4 = Moles of CCL4 x Molar mass of CCL4

 Mass of CCL4 = 2.5 moles x 153.823 g/mol => 384.5575 grams

Therefore 384.6 grams of carbon tetrachloride can be produced from reacting 709.0 grams of chlorine.

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Answer:

OA. YESS

Explanation:

They will because they are all over America.

Answer:

4.25*10^18

Explanation:

1 mole =6.023*10^23 particles

so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles

Total pressure = 4.9 atm

Partial pressure of neon =  3.4 atm

Partial pressure of oxygen = 1.5 atm

We know that the partial pressure could be obtained as the product of the mole fraction and the total pressure thus we have to obtain the total pressure by the use of the partial pressures.

For the number of moles of helium;

P = 101.3 kPa or 0.99 atm

T =  25ºC or 298 K

V =  27 L

n = PV/RT = 0.99 atm * 27 L/0.082 *  298 K = 26.73/24.44 = 1.1 moles

Number of moles of oxygen

P = 101.3 kPa or 0.99 atm

T =  25ºC or 298 K

V =  12 L

n = PV/RT = 0.99 atm * 12 L/0.082 *  298 K =11.88 /24.44 = 0.5 moles

Total number of moles = 1.1 moles + 0.5 moles = 1.6 moles

Total pressure is obtained from;

nRT/V

= 1.6 moles * 0.082 * 298/8

= 4.9 atm

Partial pressure of neon = 1.1 moles/1.6 moles * 4.9 atm = 3.4 atm

Partial pressure of oxygen = 0.5 moles/1.6 moles * 4.9 atm = 1.5 atm

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The statements which is true about the reactants from the given simulation above is: It involves the breaking of chemical bonds.

The correct answer choice is option c

For a chemical reaction to occur, the bond between the reacting substances breaks either by covalent or electrovalent bonding in order to form new substance.

So therefore, reactants usually break chemical bonds duringchemical reaction.

Complete question:

A chemical reaction causes the chemical compositions of substances to change. Reactants are substances that enter into a reaction, and products are substances produced by the reaction

Which of the following are the reactants for this simulation? Select all that apply

a. A chemical reaction results to formation of new bonds

b. A chemical reaction involves the formation of new substance.

c. It involves the breaking of chemical bonds

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The density of the metal has the high inherit percentage of error than the value for the liquid because the possibility error in measuring the volume of the solid is more than the liquid.

The density is expressed as follows :

Density = mass / volume

The volume of the solid cannot be measure directly. The volume of the solid can be measured by immersing the solid in to the liquid and then we measure the volume of the liquid displaced. The possibility error in measuring the volume of the solid, especially when the shape of the solid is irregular, is more than the liquid.

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Answer:

116.64 g

Explanation:

74.23÷14 This is # of moles .

# of moles for co = 5.302

Then mass of co2 = 116.64

Answer:

It gains electrons, reducing its overall charge

Explanation:

When an element is reduced, It means It gains electrons, reducing its overall charge. Hence the correct option is (B)

Redox is a type of chemical reaction in which the oxidation states of substrate change.

Oxidation is the loss of electrons or an increase in the oxidation state (Charge) of a chemical or atoms within it.

Reduction is the gain of electrons or a decrease in the oxidation state (Charge) of a chemical or atoms within it.

Therefore, When an element is reduced, It means It gains electrons, reducing its overall charge. Hence the correct option is (B)

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\(0.1158 \10^{-3} times\) mol of NaOH  is needed to neutralise  36.1 ml of potassium hydroxide solution.

\(To\ determine\ the mass \ of {KHP}$ reaquired. \\we should first determine the number of moles of $\mathrm{NaOH}$ present is $3.21 \mathrm{~mL}$ of $36.1 \mathrm{M} \mathrm{MNaOH}$ solution.Moles of $\mathrm{NaOH}=$ molonity of $\mathrm{NaOH}$ $x$ solution of $\mathrm{NaOH}$ in $(\mathrm{L})$\)

\($$\begin{aligned}&=36.1\frac{\mathrm{mol}}{\mathrm{K}} \times \frac{3.21}{1000} \mathrm{~K} \\&=0.1158 \times 10^{-3} \mathrm{~mol} \text { of } \mathrm{NaOH}\end{aligned}$$\)

moles are the a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, or other defined particles.  A mole means a very large number of units, 6.0221076 × 1023.

The number of atoms or other particles in a mole is the same for all substances. A mole is related to the mass of an element as follows:

one mole of carbon-12 atoms is 6.0221076 × 1023 atoms and has a mass of 12 grams. By comparison, one mole of oxygen, by definition, consists of the same number of atoms as carbon-12, but has a mass of 15,999 grams. Therefore, the mass of oxygen is greater than the mass of carbon. This reasoning can also be applied to molecular weights or formula weights.

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The option that is not a monoprotic acid is (B) H\(_{2}\)C\(_{2}\)O\(_{4}\).

A monoprotic acid is an acid that can donate only one proton (H+ ion) per molecule during a chemical reaction. In the given options, HBr (hydrobromic acid), HCN (hydrocyanic acid), and CH\(_{3}\)CO\(_{2}\)H (acetic acid) are all monoprotic acids as they can each donate one proton.

However, H\(_{2}\)C\(_{2}\)O\(_{4}\)(oxalic acid) is a diprotic acid, meaning it can donate two protons. It has two acidic hydrogen atoms that can be ionized sequentially. Therefore, H\(_{2}\)C\(_{2}\)O\(_{4}\) is not a monoprotic acid.

Option B is the correct answer.

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Answer:

n = 0.43 moles

Explanation:

from ideal gas equation;

PV = nRT

making n subject of the formula

n = PV/RT

but;

T = (10 + 273)k = 283k

P = 2 atm

V = 5dm³

R = 0.082

Therefore,

n = 2 x 5

0.082 x 283

= 0.43 moles

If we mixed 3 moles of HBr with 2 moles of KOH in enough water to make 1 liter of solution, then the amount of KBr that would be formed would be 3 moles.

The balanced chemical equation for the reaction between HBr and KOH is:

HBr + KOH → KBr + H2O

In the given case, we have 3 moles of HBr and 2 moles of KOH

Their mole ratio = 1.5:1.

This means that for every 1.5 moles of HBr, we have 1 mole of KOH, which will be enough to react with all the HBr.

So, the amount of KBr formed would be 3 moles, which is the same as the amount of HBr that was added to the reaction.

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Answer:

The correct answer to that question is glaciers, waves, wind.

Answer:

I think it is D but I could be wrong.

Explanation:

In the gold foil experiment, alpha particles shot at gold foil bounced in the opposite direction from a gold foil which indicated atoms have a small, dense nucleus.

Rutherford’s α-particle scattering or gold foil experiment changed our perception of the atomic structure of an atom. Rutherford bombarded beams of α-particles at thin gold foil and observed how the α-particles scattered from the gold foil.

Rutherford showed that the atom has the most empty space with the nucleus at the center and electrons rotating around the atomic nucleus. Highly charged α-particles passed straight undeflected through the foil. This will be the expected result if the plum pudding model of Thomson was correct.

A few charged alpha particles were deflected backward direction leading to the positive charge concentrated in a small space.

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