What is the name of the ion with 4 protons and 2 electrons?.

The relative atomic mass of hydrogen 1.00

The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit

Here given data is

99.30% of H atoms

0.70% H atoms

So we have to calculate the relative atomic mass of hydrogen. = ?

So the relative atomic mass = (isotope abundance × isotope mass) + (isotope abundance × isotope mass)

Relative atomic mass = (99.30% × 1) + (0.70% × 1)

Relative atomic mass = 1.00

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Answer:

hydrogen bonds

Explanation:

the strongest of all bonds

Hydrogen is able to bond with itself hydrogen doesn't obey the rule of octet because it requires only 2 electrons to have its outer shell filled and gain stability.

so the bond is formed when the 2 atoms come closer  and their electrons are attracted to the proton of the other atoms hence bonding covalently

covalent bond is a type of bond in which a chemical bond that involves the sharing of electrons to form electron pairs between atoms

Helium cannot form covalent bonds this is because it has a complete shell of electrons and in this state, the atom cannot readily accept any additional electrons or join with any element or atoms to make a bond also the gas is a noble its valence shell is full and it gains no stabilizing effect forming covalent bonds.

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Giant molecules are also referred to as macromolecules and polymers when numerous molecules are combined. These atoms are arranged in a three-dimensional structure and are joined by covalent bonds.

A giant molecule, also known as a macromolecule, is a usually large molecule crucial to biophysical processes, such as a protein or nucleic acid. It is made up of many atoms that are covalently bound. Large non-polymeric molecules including lipids and macrocycles, as well as biopolymers, are the most prevalent macromolecules in biochemistry. In addition to synthetic fibers, giant molecules can also be found in research materials like carbon nanotubes.

Different experts use different terminology for giant molecules. For instance, in biology, giant molecules refer to the four immense molecules that make up living things, while in chemistry, it refers to aggregates of two or more molecules that are held together by intermolecular forces rather than covalent bonds yet that is difficult to dissolve apart. The term giant molecule is frequently referred to as high polymer in British English.

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The element to which this atom belongs is Indium (In).

The ground-state electron configuration provided is [Kr]4d10 5s2 5p1.

To determine the element this atom belongs to, we can add up the total number of electrons:

[Kr] represents Krypton, which has 36 electrons, plus:

4d10 → 10 electrons,

5s2 → 2 electrons,

5p1 → 1 electron.

Total electrons = 36 + 10 + 2 + 1 = 49.

The element with an atomic number of 49 is Indium (In).

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Enthalpy, in a technical sense, refers to the internal energy needed to create a system as well as the energy needed to create space for it by establishing its pressure, volume, and displacing its surroundings.

In a thermodynamic system, energy is measured by enthalpy. Enthalpy is a measure of a system's overall heat content and is equal to the system's internal energy plus the sum of its volume and pressure.

A state function that is entirely based on state functions P, T, and U is how enthalpy is also described.

Here the equation used is:

q = n × ΔH

n = Mass / Molar mass

n = 253 / 122.55 = 2.064 mol

q =  2.064 × -91 = -187.82 kJ

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A dose of 2 tablets of the antacid will neutralize 0.01479 moles of hydrochloric acid.

To find the total number of moles of hydrochloric acid that will be neutralized by a single dose of 2 tablets, first calculate the number of moles of each active ingredient. The balanced chemical equation for the reaction between the two antacid active ingredients and hydrochloric acid is as follows:

CaCO3 + 2HCl → CaCl2 + CO2 + H2OMg(OH)2 + 2HCl → MgCl2 + 2H2O

From the above chemical reaction equations, CaCO3 reacts with two molecules of hydrochloric acid (HCl) to produce one molecule of CO2, one molecule of water (H2O), and one molecule of calcium chloride (CaCl2). Similarly, Mg(OH)2 reacts with two molecules of hydrochloric acid (HCl) to produce two molecules of water (H2O) and one molecule of magnesium chloride (MgCl2). So, 558 mg of CaCO3 is equal to 558/1000 g or 0.558 g and 106 mg of Mg(OH)2 is equal to 106/1000 g or 0.106 g.

The molar mass of CaCO3 is 40.08 + 12.01 + 3(16.00) = 100.09 g/mol

The molar mass of Mg(OH)2 is 24.31 + 2(16.00) + 2(1.01) = 58.32 g/mol

Now, to calculate the number of moles of each active ingredient, you can use the following formula:

n = mass/molar mass

So, for CaCO3:

n = 0.558/100.09 = 0.005575 moles

And for Mg(OH)2:

n = 0.106/58.32 = 0.001818 moles

Now, calculate the number of moles of hydrochloric acid that each active ingredient will neutralize. Multiply the number of moles of each active ingredient by the number of moles of HCl that reacts with one mole of the active ingredient. From the balanced chemical equation above, you know that two moles of HCl react with one mole of CaCO3 and two moles of HCl react with one mole of Mg(OH)2. So, the number of moles of HCl that will react with CaCO3 is:

nHCl = 2nCaCO3 = 2(0.005575) = 0.01115 moles

And the number of moles of HCl that will react with Mg(OH)2 is:

nHCl = 2nMg(OH)2 = 2(0.001818) = 0.003636 moles

Now, you can add the number of moles of HCl that will react with each active ingredient to find the total number of moles of HCl that will be neutralized by two tablets:

nHCl total = nHCl CaCO3 + nHCl Mg(OH)2 = 0.01115 + 0.003636 = 0.01479 moles

So, a dose of 2 tablets of the antacid will neutralize 0.01479 moles of hydrochloric acid.

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The acid mostly dissociates when dissolves in water.

option C.

A strong acid is an acid that is completely dissociated in an aqueous solution such as water when it is dissolved in it.  Strong acid is a chemical species with a high capacity to lose a proton, H+.

In other words, a strong acid is one which is virtually 100% ionized in solution.

Thus, when a compound is described as a strong acid it means that: the acid mostly dissociates when dissolves in water.

So option C is the correct answer as it explains the meaning of a strong acid.

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Answer:

D.CaCl2

Explanation:

Answer:

When the electron, proton, and neutron move at the same speed, the electron will have the lowest matter wave wavelength of the trio.

The de Broglie wavelength of a particle is given by the equation λ = h / p, where λ is the wavelength, h is Planck's constant, and p is the momentum of the particle. Since the speed of the electron, proton, and neutron is the same, their momentum will be directly proportional to their mass.

Comparing the masses of the three particles, we find that the electron has the smallest mass, followed by the proton, and the neutron has the largest mass.

Therefore, for the same speed, the electron will have the largest momentum, and consequently, the smallest matter wave wavelength.

In summary, the electron will have the smallest matter wave wavelength among the electron, proton, and neutron when they have the same speed.

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To calculate how long it will take for a first order reaction in A to reach 10% of its initial concentration, you can use the following formula:

Where k is the rate constant of the reaction and ln is the natural logarithm. In this case, since the half-life of the reaction is 2 minutes, k can be calculated as 0.693 / 2 minutes, or 0.346. Plugging this value into the formula, we get:

This equals approximately 8.1 minutes, so it will take 8.1 minutes for the reaction to reach 10% of its initial concentration.

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According to molar concentration, four liters of solvent would be needed to create a 5.5 M solution from 22 moles of sodium chloride.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters. Substitution of values in formula gives, volume= 22/5.5=4 liters.

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The guideline that is recommended for a nurse who is collecting a stool specimen of a client suspected of having clostridium difficile includes the following procedures:

1. Use a new pair of gloves for each step in the process of specimen collection, removing the old gloves each time.

2. A bedpan is provided by the nurse for the client to have a bowel movement.

3. The bedpan is then thoroughly washed, disinfected, and dried.

4. The client's buttocks are washed with warm, soapy water and dried with a clean towel.

5. The nurse wears gloves to remove the stool specimen from the bedpan.

6. The specimen is placed in a sterile container and taken to the laboratory as soon as possible.

7. The nurse takes care to avoid touching any part of the specimen container that will come in contact with the laboratory personnel.

The nurse should adhere to standard infection control procedures to protect both the nurse and the client from potential infection. The nurse should make certain to wash their hands before and after the procedure. A stool sample is usually the best way to confirm the diagnosis of Clostridium difficile infection. It can be challenging to diagnose C. difficile infection in the early stages.

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Answer:

I got u my boy It Ethanol

Explanation:

Answer:

the ability to be reproduced or copied.

Explanation:

Answer:  the ability of an entire experiment or study to be reproduced, either by the researcher or by someone else working independently.

Answer:

136 g Al₂O₃

Explanation:

Assuming you do not need to find the limiting reactant, to find the mass of Al₂O₃, you need to (1) convert grams O₂ to moles O₂ (via molar mass), then (2) convert moles O₂ to moles Al₂O₃ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value (64.0 g).

Molar Mass (O₂): 32 g/mol

Molar Mass (Al₂O₃): 102 g/mol

4 Al + 3 O₂ -----> 2 Al₂O₃

64.0 g O₂           1 mole           2 moles Al₂O₃            102 g
-----------------  x  --------------  x  ------------------------  x   -------------  =  136 g Al₂O₃
                             32 g               3 moles O₂             1 mole

Answer:

Explanation:

Based of the fact that you were given 2 masses I would assume this to be a limiting reagent question. However amount on the left side both equal 2. Ignoring limiting reagents and focusing on just O2 the steps would be:

1. Make sure the equation is balanced ( already given)

2- Use given values to find the mols of O2 (mass/molar mass)

3. Mols are conserved but due to the coefficients the molar value from O2 must be divided by three and multiplied by 2 to ensure proper ratios

4. Using that amount the mass can derived using amount/molar mass

5. Use proper significant digits and units(3 in this case)

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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Answer:

bebe bebe bebe

Explanation:

According to Gay Lussac's law, the pressure of a given mass of gas is directly proportional to its temperature provided that volume is constant. Mathematically;

From the given question, we are given the following parameters:

Substitute the given parameters into the formula as shown:

Therefore the pressure of the spray paint at 480 celsius is 50.71psi

Answer:

Lipid

Explanation:

I just took the test and I got it right

Cell membranes are primarily made of fatty acids which are the components of lipids. Thus, the correct option is D.

A cell membrane may be defined as a biological membrane that separates the interior of the cell with respect to the outer environment. It provides overall protection to the cell from external damage.

The Cell membrane is made up of a phospholipid bilayer. This bilayer is amphipathic in nature. The phosphate group forms a polar head while lipid forms a non-polar tail.

Due to undissolved in water, lipids deliver stability to the cell membrane against the water.

Therefore, Cell membranes are primarily made of fatty acids which are the components of lipids. Thus, the correct option is D.

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Answer:

b

Explanation:

12 Km / hour

Explanation:

using the formula

average speed =  ( where time is in hours )

40 min =  =  hour

speed = 8 ÷  = 8 ×  = 12 Km / hour

Answer:

12 Km / hour

The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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The intermolecular forces that are responsible for the dissolution of Ethylene glycol in water is hydrogen bonding dipole-dipole forces and dispersion forces.

Both ethylene glycol and water contains the pair of hydrogen and oxygen.

The hydrogen of one atom create a bond with the oxygen of other atom this results in the formation of intra molecular hydrogen bonding.

The electron are non uniformly distributed over the molecule or the atom which results in the fluctuation of the electron density in the atom.

So it creates are dispersion forces which is present all over the molecule this forces helps to increase the strength of the bond formed between the ethylene glycol and water because they have large masses.

Both ethylene glycol and water are polar molecules because of being polar they form dipole and the dipole of both the molecules interact with each other in order to form bond between the atoms which eventually results in the formation dissolution of ethylene glycol in water.

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Compete Question - which intermolecular forces are responsible for the dissolution of ethylene glycol? select all that apply hydrogen bonding, dipole-dipole, dispersion and Ion dipole interaction.

Answer:

C1V1=C2V2

C1 is 2.0mol/l

V1=?

C2=.4mol/L

V2=100ml or for this 0.1L

V1 is 20ml

Best way to prepare this is to measure out 20ml of the 2 molar solution and add 80mL to it to get to 100mL

Explanation:

Answer:

See explanation

Explanation:

While it is true that there are only about 90 naturally occurring elements, these elements are capable of combining with each other to form millions of substances.

Most of the substances that we see around us today result from a combination of one or more of these naturally occurring elements.

Let us look at three examples;

The carbohydrate in food is composed of carbon, hydrogen and oxygen

The stainless steel materials we use are composed of iron, carbon and other trace elements

Glass is made up of silicon, oxygen and other elements

Only 90 naturally occurring elements capable of combining with each other to form millions of substances.

Compounds:

When two or more elements combine in a certain ratio to form a molecule.

For example-

Water is made up of two hydrogen and one Oxygen ration is 2:1.

If hydrogen and Oxygen combine inn 2:2, they for Hydrogen peroxide.

Water gives life and Hydrogen peroxide can kill a person.

Other examples are,

Therefore, only 90 naturally occurring elements capable of combining with each other to form millions of substances.

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Answer:

D. Thermometer

Explanation:

The equipment used to measure the temperature of any reaction is the thermometer.

A thermometer is any device that has been specifically calibrated to measure the temperature values of reaction.

Answer:

This is because earth is at a tilt, and the tilt is the cause of all seasons. In winter, we are the furthest from the sun due to the tilt.

Explanation: