Are isotopes similar to ions, yes or no?

Answer:

B

Explanation:

Answer:

i think its 62.50 :) hope this helped you out

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The graph showing a person who is walking at the same rate with no change in speed or velocity is :

Answer:

The answer is C

Explanation:

Answer:

c

Explanation:

one in four  are the odds of acquiring an sexually transmitted infections

during a lifetime.

Sexually transmitted infections (STI) are described as the  infections or conditions that you can get from any kind of sexual activity involving your mouth, an_us, vagi_na or pe_nis.

The chances of getting an Sexually transmitted infections  from one unprotected encounter with a partner who is infected with syphilis, gonorrhea, or chlamydia are about 30 percent.

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This idea has historical significance. The ancient Greek philosopher Democritus (born 460 BCE), who held that everything is composed of small particles moving in empty space, is credited with developing the first hypothesis we have about the microscopic universe. He had some concrete proof for this, such the fact that items like a new loaf of bread or a rose may give off a scent even when they are far from the source. Being a materialist, he thought that these odors originated from actual material particles released by the bread or the rose, rather than being purely a type of magic. He reasoned that these particles must float through the air, with some of them maybe landing in your nose where you can smell them immediately. This still makes sense in modern times. But many of us now have quite different perspectives on these "particles."

Thank you,

Eddie

Answer:

The seasons are a result of the tilt of the earth

When 100 grams of nitrogen reacts with 100 grams of hydrogen, the number of molecules of ammonia produced can be calculated as follows: Step-by-step explanation:

According to the balanced chemical equation:N2 + 3H2 → 2NH3The ratio of nitrogen to ammonia produced is 1:2. Therefore, if 1 mole of nitrogen reacts, it produces 2 moles of ammonia. Hence, the number of moles of nitrogen and hydrogen can be calculated as follows:100 g of nitrogen = 100/28 g/mol = 3.57 mol100 g of hydrogen = 100/2 g/mol = 50 mol Since the reaction requires 3 moles of hydrogen to react with 1 mole of nitrogen, only 1/3 of the hydrogen will be used.

Hence, the limiting reactant is nitrogen, which means that all the nitrogen will be consumed in the reaction, and the number of moles of ammonia produced will be equal to the number of moles of nitrogen used, i.e., 3.57 moles. Therefore, the number of molecules of ammonia produced can be calculated using the Avogadro's number, which is 6.022 × 1023 molecules per mole. Hence, the number of molecules of ammonia produced is:3.57 mol NH3 × 6.022 × 1023 molecules/mol = 2.15 × 1024 molecules of ammonia.

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The physical mechanism causing the change in strength when using brine as the pore fluid is the presence of salt ions that weaken the interparticle bonds. Salt can reduce the shear strength of clays by increasing the repulsive forces between clay particles.

The strength of clay types at 50% water content can vary depending on whether DI water or brine is used as the pore fluid. Generally, there is a significant difference in strength between the two.

The presence of salt in brine can have an effect on the shear strength of clays. When salt is dissolved in water, it creates ions that can interact with the clay particles. These interactions can lead to the formation of electrical double layers around the clay particles, which can increase the interparticle repulsion and decrease the shear strength of the clay.

On the other hand, when DI water is used as the pore fluid, there is no presence of salt ions to affect the interparticle interactions. As a result, the clay particles can have stronger bonds and higher shear strength compared to when brine is present.

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Answer:

Charles's Law states that the volume of a gas is directly proportional to its temperature, when pressure is constant. Therefore, the best piece of evidence to support Charles's Law would be an experiment that demonstrates a direct relationship between the volume of a gas and its temperature under constant pressure conditions. This experiment could involve measuring the volume of a gas at different temperatures and showing that as the temperature increases, the volume of the gas also increases, and vice versa.

An example of experiment that supports Charles's Law is measuring the volume of a gas at a fixed pressure inside a container and heating the gas. As the temperature rises, the volume of the gas increases, and when the container cooled down the volume decreases.

It's important to note that Charles's Law is one of the ideal gas laws, which assumes that the gases are perfect and behave in a certain way. In reality, gases can deviate from the predictions of the ideal gas laws depending on the nature of the gas and the conditions under which it is measured

The most compelling evidence supporting Charles's Law is the balloon experiment. This experiment shows that as the temperature of gas increases, so does its volume, as long as the pressure is constant. This law is used in real-life applications, like hot air balloons.

One of the most compelling pieces of evidence that supports Charles's Law is the balloon experiment. In this experiment, a balloon filled with air is heated, and it can be observed that as the temperature of the gas (air in this case) increases, the volume of the balloon also increases. This demonstrates that the volume of a specific amount of gas is directly proportional to its temperature, assuming the pressure stays constant, as stated in Charles's Law. This indicates the predictability and reliability of Charles's Law in actual applications, like how hot air balloons work.

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Answer:

No bcz it is insulator it will not conduct electric

Answer:

93.28%

Explanation:

To solve the percent yield we need to find theoretical yield:

Percent yield = Actual Yield (452.78g) / Theoretical yield * 100

Theoretical yield is obtained converting the mass of acetylene to moles and using the balanced equation determine the moles of CO₂ produced assuming a 100% of reaction:

Moles acetylene (Molar mass: 26.04g/mol)

143.6g C₂H₂ * (1mol / 26.04g) = 5.515 moles C₂H₂

Moles CO₂:

5.515 moles C₂H₂ * (4 moles CO₂ / 2mol C₂H₂) = 11.029moles CO₂

Mass CO₂ (Molar mass: 44.01g/mol):

11.029moles CO₂  * (44.01g / mol) = 485.39g CO₂ is theoretical yield

Percent yield is:

Percent yield = 452.78g / 485.39g * 100

= 93.28%

Answer:

C

Explanation:

I hypothesis needs to be tested to know whether it is true or not. Here is the definition:

A supposition or proposed explanation made on the basis of *limited evidence as a started point for further investigation*

Answer:

1. 749.6

2. 159.8

3. 60.4

4. 19,840,275

5. 8.029118938015202

6. 267.984

7.  1,017.169517

8.  45,945

9.   28,710

10.  14.42169022209403

11.    0.1341

and that is all that I am going to give you for the last few try to use a calculator    

Explanation:

use a calculator

The principal positively charged ion inside body cells is potassium (K+).

The principal positively charged ion inside body cells is potassium (K+). Potassium is an essential mineral that plays a crucial role in various cellular processes. It is involved in maintaining the electrical potential across cell membranes, regulating fluid balance, and supporting nerve and muscle function.

Potassium ions are actively transported into cells by the sodium-potassium pump, which helps maintain the resting membrane potential and enables the transmission of nerve impulses. The concentration of potassium ions inside cells is higher compared to the extracellular fluid, creating an electrochemical gradient that is vital for cellular processes.

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Potassium ions (K+) serve as the principal positively charged ions inside body cells, playing a vital role in cellular function. They contribute to the resting membrane potential, crucial for nerve and muscle cell activity.

Potassium ions are actively transported into cells, maintaining the balance of electrical charges.

They regulate cellular excitability, enzyme function, and osmotic balance. Additionally, potassium ions participate in signal transmission, facilitating communication between cells.

Their concentration is tightly regulated to ensure proper cell functioning. Imbalances in potassium levels can lead to various health issues.

Adequate intake of potassium-rich foods is essential to maintain optimal cellular processes and overall health.

Potassium ions are vital for maintaining the electrical balance and enabling normal cellular activities within the body.

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Approximately 499.61622 grams of the 500 grams of blueberries would be considered waste product, which is approximately 99.92% of the total weight.

To determine the percentage of the blueberry that is considered waste product, we need to calculate the amount of potassium in 500 grams of blueberries and subtract it from the total weight of the blueberries.

First, we can find the amount of potassium in 500 grams of blueberries using the given ratio:

148 grams of blueberries contain approximately 115 mg of potassium.

So, the amount of potassium in 500 grams of blueberries can be calculated as follows:

(115 mg / 148 g) * 500 g = 383.78 mg

Next, we subtract the amount of potassium from the total weight of the blueberries:

500 g - 383.78 mg = 499.61622 g

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Answer:

c. floodplain

Explanation:

brainliest please!

Answer:

I think the answer is floodplain.

Explanation:

I hope this helps, have a blessed day.

(a) The main inorganic carbon system reactions in seawater involve the transfer of CO2 from the air phase into the water phase. The associated chemical equilibrium equations are as follows:

CO2 (aq) + H2O ↔ H2CO3 ↔ HCO3- + H+ ↔ CO32- + 2H+

CO2 (aq) is the dissolved CO2 in the water phase, H2CO3 is the carbonic acid, HCO3- is the bicarbonate ion, H+ is the hydrogen ion, and CO32- is the carbonate ion.

(b) Manipulation of the chemical equilibrium equations yields the following expressions for [HCO3-] and [CO32-] as a function of pCO2 and [H+] only:

[HCO3-] = K1*pCO2/[H+]

[CO32-] = K2*K1*pCO2/[H+]2

Where K1 and K2 are the carbonic acid and bicarbonate ion dissociation constants, respectively.

(c) If pH were to decrease while pCO2 remained the same, [HCO3-] would decrease more than [CO32-]. This is because the equation for [HCO3-] is directly proportional to [H+], whereas the equation for [CO32-] is inversely proportional to [H+]. As pH decreases, [H+] increases, so [HCO3-] decreases more drastically than [CO32-].

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Answer:

hope it helps

Explanation:

It is polar. That is why water sticks to your skin, unlike wax, a nonpolar substance.

Water intoxication occurs when A. The body’s electrolytes are out of balance.

The major effect of the process of Water intoxication in the human body is to produce homeostatic unbalance, which is followed by the presence of abnormal electrolyte levels in the blood and it has a toxic effect on our health.

Therefore, with this data, we can see that the effect of the process of Water intoxication in the human body is to change electrolyte concentration.

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The density of gold in SI units is 19,000 kg/m³. Gold's relative density of 19 means that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³. Therefore, by multiplying the relative density of gold by the density of water, we can find the density of gold in SI units. In this case, 19 multiplied by 1000 kg/m³ equals 19,000 kg/m³, which is the density of gold in SI units.

In the context of this problem, the relative density of a substance is defined as the ratio of its density to the density of a reference substance, in this case, water at 4°C. By multiplying the relative density by the density of the reference substance, we can calculate the density of the substance in SI units.

In this example, the relative density of gold is 19, indicating that gold is 19 times denser than water at 4°C. Multiplying the relative density by the density of water (1000 kg/m³) yields the density of gold as 19,000 kg/m³ in SI units.

To summarize, the density of gold in SI units is 19,000 kg/m³. The relative density of gold is 19, indicating that it is 19 times denser than water at 4°C, which has a density of 1000 kg/m³.

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Answer:

The potential energy of the products is greater than the potential energy of the reactants

Explanation:

i just took the test

In an endothermic reaction, activation potential energy of reactants is less than that of the products. Reactants in endothermic reaction are absorbing enough heat energy to overcome this barrier potential. Hence, option B is correct.

An endothermic reaction is the one in which heat energy is absorbed by the reactants from the surroundings. In endothermic reactions, the enthalpy change is positive.

The minimum energy that the reactants have to acquire for effective collision and reaction is called the activation energy. By absorbing heat energy reactants becomes  more energetic and overcome this activation potential.

Therefore, in an endothermic reaction, the activation potential of products will be higher than that of the reactants and the energy diagram  clearly exhibit this transition in energy. Hence, option B is correct.

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The ionic salt KBr is dissolved in water A mass of 51. 0 g of salt is added to 100. G of water. ΔHsoln for KBr is 8. 00 kJ/mol . The final temperature is 28.43 ° C.

Given that :

The initial temperature T1 = 23 °C

The ΔH for KBr = 8 kJ/mol

The molar mass of the KBr = 119 g/mol

The 51 g of the KBr , produces energy = (51 × 8 ) / 119

                                                                = 3.428 kJ

                                                                = 3428 J

The  total mass = 100 + 51

                          = 151 g

Q = m c ΔT

3428 = 151 × 4.184 ΔT

ΔT = 3428 / 631.18

ΔT  = 5.431 K

T2 - T1 = 5.431 ° C

T2 = 5.431 + 23

T2 = 28.43 ° C

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The kinds of intermolecular forces that are present in each element or compound are as follows:

1. Kr - dispersion forces

2. NH3 - dispersion forces, dipole-dipole forces and hydrogen bonding

3. NO - dispersion forces and dipole-dipole forces

4. CH4 - dispersion forces


Let's understand this in detail:

The electronegativity of the atom in question and the relative proximity of the atom to other atoms determines the strength of the intermolecular forces.

In Kr, the intermolecular forces present are the weakest type, dispersion forces. This is because Kr is a noble gas with the lowest electronegativity among the elements.

In NH3, stronger dispersion forces, dipole-dipole forces, and hydrogen bonding are present because nitrogen has a high electronegativity and is surrounded by three hydrogen atoms with partial positive charges due to their electron-deficient nature.

In NO, there are only dispersion and dipole-dipole forces since no hydrogen atom is present to form hydrogen bonding.

Finally, in CH4, only dispersion forces are present since the four hydrogen atoms do not form a tetrahedral structure due to their symmetrical electron distribution.

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The organic product formed when 1−hexyne is treated with H₂O, H₂SO₄, and HgSO₄ will be 2-hexanone (structure attached).

This reaction is an example of an oxymercuration reaction of the organic product 1−hexyne.

Oxymercuration is shown in three steps to the right. The nucleophilic double bond attacks the mercury ion, releasing an acetoxy group. The mercury ion's electron pair attacks carbon on the double bond, generating a positive-charged mercuronium ion. Mercury's dxz and 6s orbitals give electrons to the double bond's lowest unoccupied molecular orbitals.

In the second stage, the nucleophilic H₂O attacks the highly modified carbon, freeing its mercury-bonding electrons. Electrons neutralize mercury ions by collapsing. Water molecules have positive-charged oxygen.

In the third stage, the negatively charged acetoxy ion released in the first step attacks the hydrogen of the water group, generating the waste product HOAc. The two electrons in the oxygen-hydrogen link collapse into oxygen, neutralizing its charge and forming alcohol.

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Answer:-8

Explanation:

edmentum

The solution for the given linear equation can be solved by simplifying the equation. The value of x is obtained as - 8.

Linear equations are the equations which shows a linearity with a second expression which is similar to the first but having different mathematical operations and signs.

By solving linear equations we can solve for the unknown value of x. The value of x can be obtained by taking the whole expression to one side and which is having a constant value.

Given, - 3x + 7x - 8 = 34 + 9x -2.

          = 4x - 8 = 32 + 9x

          = 4x - 8 - 9x = 32

             -5x = 40

              x = - 40/5 = - 8.

Hence, solution of the given equation is  -8.

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Answer:

1.This answer would be option A.

2. I think that would be 1350

Explanation:

Answer:

C2H2 + 5 O2 = 4 CO2 + 2 H2O

Add / Edited: 27.09.2014 / 25.01.2015

Evaluation of information: 5.0 out of 5 / number of votes: 2

Source: https://chemiday.com/en/reaction/3-1-0-339

Explanation: