Organic molecules are defined as molecules that contain.

Answer:

Mass = 0.287 g

Explanation:

Given data:

Number of moles of MgCl₂ = 0.001 mol

Mass of precipitate formed (AgCl) = ?

Solution:

Chemical equation:

MgCl₂(aq) + 2AgNO₃(aq)    →       Mg(NO₃)₂(aq) + 2AgCl (s)

now we will compare the moles of MgCl₂ and AgCl.

            MgCl₂           :            AgCl

                1                :             2

           0.001             :       2/1×0.001 = 0.002

Mass of AgCl:

Mass = number of moles × molar mass

Mass = 0.002 mol × 143.4 g/mol

Mass = 0.287 g

The particle that makes the atom an unstable isotope is the neutron. When there is an excess or a deficiency of neutrons in an atom's nucleus, it becomes an unstable isotope.

Unstable isotopes are isotopes that decay and emit radiation until they reach a stable state. They are also known as radioactive isotopes. The radioactive isotopes are unstable and have an unpredictable lifespan because they have an unstable ratio of neutrons to protons. This excess of neutrons in the nucleus results in a greater electrostatic repulsion between protons, causing instability and eventually decay.Neutrons are the particles that are responsible for making atoms unstable isotopes. The excess or deficiency of neutrons in an atom's nucleus leads to an unstable state and eventually decay. Radioactive isotopes are important for various practical applications such as nuclear power, radiography, and cancer treatment.

Therefore, neutrons makes the atom an unstable isotope. The decay of unstable isotopes can be used for many practical applications such as nuclear power, radiography, and cancer treatment.

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Answer:

The characteristic of silicon that is most closely related to its chemical reactivity is that;

It is found in nature in mainly as oxides and silicates

Explanation:

Silicon, which is a member of group 14 of the periodic table has the electron configuration of [Ne]3s²3p² and has a high affinity for oxygen such that the the oxides are known as silicates and it is almost impossible to find pure silicon in nature and it is found in the universe as silica and silicates

Silicate minerals make up over 90% of the Earth's crust such that, by mass silicon is only surpassed by oxygen as the most abundant element found in the Earth's crust.

Answer:

Examples of calcium channel blockers include:

Amlodipine (Norvasc)

Diltiazem (Cardizem, Tiazac, others)

Felodipine.

Isradipine.

Nicardipine.

Nifedipine (Procardia)

Nisoldipine (Sular)

Verapamil (Calan SR, Verelan)

Answer:

Good environmental and weather conditions.

Explanation:

The main influence for a horse that will become a racehorse or farm horse are  good environmental and weather conditions. It also needs good food and proper training to made a racehorse. High quality race of a horse always prefer for making a racehorse because it has higher agility, speed, and spirit as compared to horse belongs to ordinary race.

Answer:

1.38 moles

Explanation:

My teacher gave us the answer on a quiz so here if y’all want a explanation I’ll give y’all one tho

3,500 grams of O2 are required to react with 1000 grams of octane.

To answer this question, we need to use stoichiometry. First, we need to balance the equation:

C8H18(l) + 12.5 O2(g) → 8 CO2(g) + 9 H2O(l)

Now we can see that for every 12.5 moles of O2, we can produce 8 moles of CO2. We can use this ratio to find out how many moles of O2 are needed to react with 1 mole of octane:

12.5 mol O2 / 1 mol octane

To find out how many grams of O2 are needed to react with 1000 g of octane, we need to convert 1000 g of octane to moles:

1000 g octane x (1 mol octane / 114.23 g octane) = 8.75 mol octane

Now we can use the ratio above to find out how many moles of O2 are needed:

12.5 mol O2 / 1 mol octane x 8.75 mol octane = 109.4 mol O2

Finally, we can convert moles of O2 to grams:

109.4 mol O2 x (32.00 g O2 / 1 mol O2) = 3,500 g O2

Therefore, 3,500 grams of O2 are required to react with 1000 grams of octane.

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3,500 grams of O2 are required to react with 1000 g of octane.

To answer this question, we need to use stoichiometry to find the mole ratio of octane and oxygen and then use the molar mass of oxygen to calculate the mass of oxygen needed to react with 1000 g of octane.

The balanced chemical equation is:

C8H18(l) + 12.5 O2(g) → 8 CO2(g) + 9 H2O(l)

The mole ratio between octane and oxygen is 1:12.5, meaning that for every 1 mole of octane, we need 12.5 moles of oxygen to react completely.

To find the number of moles of octane in 1000 g, we need to divide the mass by the molar mass:

Number of moles octane = 1000 g / 114.23 g/mol = 8.75 mol

Using the mole ratio, we can calculate the number of moles of oxygen required:

Number of moles of o2 = 8.75 mol octane × 12.5 mol O2 / 1 mol octane = 109.38 mol O2

Finally, we can calculate the mass of oxygen needed using its molar mass:

Mass of oxygen = 109.38 mol O2 × 32.00 g/mol = 3,500 g

Therefore, 3,500 grams of O2 are required to react with 1000 g of octane.

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The most stable resonance structure if nitrogen is the central atom in the CNO⁻ ion is seen in the first structure in the image attached below.

Resonance structures show the different forms of lewis structure in which a compound can exist whether as a stable resonance or an unstable resonance. It also explains the electronic bonding existing in a polyatomic compound with its bonds and charges.

The structure carrying the negative charge on the most electronegative atom is the most stable structure in resonance structures.

In the given compound CNO⁻, the lewis structure in which the resonance can exist is shown in the image attached below.

The first structure is the most stable because the negative charge is on the most electronegative element (oxygen).

The second structure has a (-2) oxidation state with two non-bonding electron pairs.

The third structure has a positive oxidation charge the electronegative oxygen which also makes it unstable.

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Answer:follow these steps Identify the given quantity in the problem.

Identify the wanted quantity in the problem.

Establish the unit path from the given quantity to the wanted quantity using equivalents as conversion factors.

Set up the conversion factors to permit cancellation of unwanted units

Explanation:

other things that may helps

Set up each problem by writing down what you need to find with a question mark. Then set it equal to the information that you are given. The problem is solved by multiplying the given data and its units by the appropriate unit factors so that only the desired units are present at the end.

Answer:

I will answer the first one for you: 5.33

Explanation:

You can use dimensional analysis to do conversions in almost any field of math. For the first problem:

\(\frac{16 feet}{} |\frac{1 meter}{3 feet} = about 5.33\)

Answer:

Both are only physical changes

A solution of rubbing alcohol that is 30% isopropanol and 70% water is  isopropanol is the solvent. Therefore, option A is correct.

A solute may be dissolved by a solvent, which creates a solution. In addition to being a liquid, a supercritical fluid, a solid, or a gas can also be a solvent.

We can say that isopropyl alcohol is the solvent in a mixture of water and isopropyl alcohol that is 70-30 because it has a larger volume.

Microorganisms are destroyed by a 70% isopropyl alcohol solution by causing the cell wall's plasma membrane to dissolve. The thin layer of peptidoglycan that makes up the gram-negative bacteria's plasma membrane is easily broken down by alcohol. Since it contains 70% isopropyl alcohol, it is referred to as pharmaceutical alcohol.

Thus, option A is correct.

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Mass of tin = moles of tin x molar mass of tin

Mass of tin = 0.020 mol x 118.7 g/mol

Mass of tin = 2.37 g

Therefore, the mass of tin in the chemical reaction is 2.37 g.

If tin is heated, it cracks. This is caused by crystals rubbing against each other. This characteristic crackle is heard if a piece of tin is simply bent. Tin is very malleable and ductile.

Some properties of tin is that it amphoteric. On reacting with both strong bases and strong acids with the evolution of hydrogen occurs. With sodium hydroxide solution, tin forms Na2[Sn(OH)6]. The reaction with acids is slow in the absence of oxygen.

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Answer:

refer to attachment OK sir

Answer & Explanation:  The Ames test examines the mutagenic effects of chemicals ; as such, it detects whether a given chemical can cause a reversion mutation in his- bacteria. While this is the purpose of the test, some of the reversion mutations are not caused by the mutagen being tested  for. The appearance of his revertants in the presence of a non-mutagenic control compound therefore indicates that His+ revertants on the control plate are the result of spontaneous mutation.

The accurate description of a geocentric solar system is the earth as a reference point.

The solar system refers to the arrangement of the sun and the planets. The description of the solar system in which the earth constitutes the center or reference point is called the geocentric model.

An alternative and more accurate model devised by Copernicus is the heliocentric model in which the sun lies at the center of the solar system.

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Answer:

I think the answer is C because it's TRUE they both do

Explanation:

Sorry I had to do some thinking on that one lol but yeah the first person who answered I think is right

The by-products produced by the E1 and/or E2 processes in the reaction of 2-methyl-2-butanol with HCl include 2-methyl-2-butene and water.

During the reaction of 2-methyl-2-butanol (also known as tert-amyl alcohol) with HCl, two main processes can occur: E1 (unimolecular elimination) and E2 (bimolecular elimination). Both processes involve the removal of a proton (H+) from the alcohol and the formation of a new bond.

In the E1 process, the reaction proceeds through a carbocation intermediate. The alcohol molecule loses a proton, resulting in the formation of a carbocation. In the case of 2-methyl-2-butanol, the carbocation formed is a 2-methyl-2-butyl carbocation. This carbocation can then undergo elimination of a leaving group (such as chloride) to form an alkene. In this case, the major product formed would be 2-methyl-2-butene. The loss of a proton and the formation of water as a by-product occur simultaneously.

In the E2 process, the reaction occurs in a concerted manner, where the proton is removed by a base (in this case, the chloride ion). The base attacks the hydrogen on the beta-carbon (the carbon adjacent to the carbon bearing the hydroxyl group), leading to the formation of a double bond. Again, the major product formed in this process would be 2-methyl-2-butene. Water is also produced as a by-product in the E2 process.

In summary, the E1 and/or E2 processes in the reaction of 2-methyl-2-butanol with HCl result in the formation of 2-methyl-2-butene as the major product, along with water as a by-product.

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The mass of H₂SO₄ that must dissolved in 1.08 liters of solution to make 2.69M solution is 271.52 grams.

The molarity of the substance is defined as the number of moles of solute per unit volume of solution in liters.

In this case,

The volume of the solution is 1.08 L.

The required molarity of the substance is 2.69M.

So,

we can write,

Molarity = Moles/Volume

Moles = Molariyt x volume

Moles =2.69 x 1.03

Moles = 2.77

Moles = Mass required/molar mass.

Molar mass of H₂SO₄ is 98 g/mol.

Putting values,

2.77=Mass required/98

Mass required = 271.52 grams.

So, 271.52 grams of H₂SO₄ is required to make 2.69M solution.

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Approximately 36.9 L of gas is in the 1.50 mol sample at 0.922 atm and 10.0°C.

To solve for the volume of gas, we can use the ideal gas law, which is expressed as PV = nRT, pressure is P, volume is V, number of mole is n, gas constant is R, and temperature in Kelvin is T. First, we need to convert the temperature to Kelvin by adding 273.15:

T = 10.0°C + 273.15 = 283.15 K

Then, we can rearrange the ideal gas law to solve for the volume:

V = (nRT) / P

V = (1.50 mol) x (0.0821 L·atm/mol·K) x (283.15 K) / (0.922 atm)

V ≈ 36.9 L

Therefore, approximately 36.9 L of gas is in the 1.50 mol sample at 0.922 atm and 10.0°C.

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a. The final temperature is 29.9°C.

b. The temperature change of the copper is 69°C.

c. The temperature change of the water is 1.7°C.

d. The energy absorbed by the water is 1892.67 J

a. To find the final temperature, we can use the principle of conservation of energy, which states that the heat lost by the copper will be gained by the water and calorimeter. The equation we can use is:

heat lost by copper = heat gained by water + heat gained by calorimeter

The heat lost by the copper can be calculated using the equation:

Q = mcΔT

where Q is the heat lost, m is the mass of copper, c is the specific heat capacity of copper, and ΔT is the change in temperature.

Q = (104 g) * (0.385 J/g°C) * (98.9°C - T)

The heat gained by the water and calorimeter can be calculated using the equation:

Q = (m_water + m_calorimeter) * c_water * ΔT

where m_water is the mass of water, m_calorimeter is the mass of the calorimeter, c_water is the specific heat capacity of water, and ΔT is the change in temperature.

Q = (63 g + 2 g) * (4.19 J/g°C) * (T - 22°C)

Setting the two equations equal to each other and solving for T, we get:

(104 g) * (0.385 J/g°C) * (98.9°C - T) = (63 g + 2 g) * (4.19 J/g°C) * (T - 22°C)

Simplifying and solving for T, we get:

T = 29.9°C

Therefore, the final temperature is 29.9°C.

b. The temperature change of the copper can be calculated using the equation:

ΔT = (Q / (m * c))

where Q is the heat lost by the copper, m is the mass of copper, and c is the specific heat capacity of copper.

ΔT = (104 g) * (0.385 J/g°C) * (98.9°C - 29.9°C) / (104 g * 0.385 J/g°C)

ΔT = 69°C

Therefore, the temperature change of the copper is 69°C.

c. The temperature change of the water can be calculated using the equation:

ΔT = (Q / ((m_water + m_calorimeter) * c_water))

where Q is the heat gained by the water and calorimeter, m_water is the mass of water, m_calorimeter is the mass of the calorimeter, and c_water is the specific heat capacity of water.

ΔT = ((63 g + 2 g) * (4.19 J/g°C) * (29.9°C - 22°C)) / ((63 g + 2 g) * (4.19 J/g°C))

ΔT = 1.7°C

Therefore, the temperature change of the water is 1.7°C.

d. The energy absorbed by the water can be calculated using the equation:

Q = (m_water * c_water * ΔT)

where m_water is the mass of water, c_water is the specific heat capacity of water, and ΔT is the temperature change of the water.

Q = (63 g) * (4.19 J/g°C) * (29.9°C - 22°C)

Q = 1892.67 J

Therefore, the energy absorbed by the water is 1892.67 J.

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Answer:

The temperature of the water in both beakers will decrease

Explanation:

Answer:

I believe it's C. "There will be no transfer of heat from the nickel to the water in the glass."

Explanation:

there won't be any transfer of heat from the nickel to the water in the glass because both the nickel and the glass of water are at the same temperature.

The mass ratio of magnesium in magnesium oxide (MgO) can be calculated by dividing the mass of magnesium (0.712 g) by the mass of magnesium oxide (1.18 g).

To find the mass ratio, we divide the mass of the element of interest (magnesium) by the mass of the compound (magnesium oxide). In this case, the mass of magnesium is given as 0.712 g and the mass of magnesium oxide is given as 1.18 g. So, the mass ratio of magnesium is calculated as follows:
Mass ratio = mass of magnesium / mass of magnesium oxide
= 0.712 g / 1.18 g
Calculating this gives us the mass ratio of 0.604.
Therefore, the mass ratio of magnesium in magnesium oxide is approximately 0.604.

The mass ratio of magnesium in magnesium oxide can be found by dividing the mass of magnesium by the mass of magnesium oxide. In this case, the mass of magnesium is given as 0.712 g and the mass of magnesium oxide is given as 1.18 g. By dividing these two values, we get a mass ratio of approximately 0.604. This means that for every gram of magnesium oxide, there are approximately 0.604 grams of magnesium. This mass ratio is useful in determining the composition of compounds and can be used in various chemical calculations.

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Answer:

The superscript after the letter

tells us the electrons are in the n=2 energy level.

Explanation:

The volume of the water vapor that we have is obtained as 149 L.

We know that there can be a conversion of matter from one state to the other. There are three states of matter that we know and these are the solid, the liquid and the gaseous states of matter.

We have to note that when we boil water, we have to supply energy to the molecules of the water such that the bonds that are holding the particles of the water can be able to break and then the water vapor would now escape.

We have that;

Number of moles of water = 120 g/ 18 g/mol

= 6.67 moles

If 1 mole of water vapor would have a volume of 22.4 L

6.67 moles of water vapor would have a volume of

6.67 * 22.4/1

= 149 L

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Answer:

scientific literacy provide essential tools for surviving in the news jungle and for responsible citizenship. They also teach us to understand our own actions, to review them critically, and to take care of our rights. This is why science education is important

Explanation:

Answer:

c is the answer then check it out

Myosin drives muscle contraction, insulin regulates blood sugar, hemoglobin transports oxygen, and collagen supports tissues. These proteins are vital for physiological functions in the body.

Of the molecules listed, three are proteins, while one is a fibrous structural protein:

1. Myosin: Myosin is a motor protein that plays a crucial role in muscle contraction and movement. It is responsible for the sliding of muscle fibers and the generation of force in muscle cells.

2. Insulin: Insulin is a peptide hormone that regulates blood sugar levels. It is produced by the pancreas and helps to control glucose uptake by cells, promoting its storage as glycogen in the liver and muscles, and regulating protein and fat metabolism.

3. Hemoglobin: Hemoglobin is a protein found in red blood cells that is responsible for transporting oxygen from the lungs to the tissues throughout the body. It binds to oxygen in the lungs and releases it in areas with lower oxygen concentrations.

4. Collagen: Collagen is a fibrous protein that provides structural support to various tissues, including the skin, tendons, ligaments, and bones. It contributes to the strength, elasticity, and integrity of these tissues.

These proteins play important roles in various physiological processes, contributing to muscle function, metabolic regulation, oxygen transport, and tissue structure.

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Complete question :

Identify the proteins in the following list of molecules.

1. Myosin

2. Insulin

3. Hemoglobin

4. Collagen

Proteins are biological molecules made of chains of amino acids. They perform many functions in organisms as determined by their amino acid composition. There are various types of proteins with diverse roles, and methods such as proteomic analysis are used to study them.

Proteins are large biological molecules comprised of long chains of smaller molecules known as amino acids. These proteins perform a plethora of functions within organisms, from transporting molecules across cell membranes to replicating DNA and catalyzing metabolic reactions. The specific functionality and properties of proteins are determined by the combination of amino acids that compose them.

There are several types of proteins which include but are not limited to structural proteins, regulatory proteins, contractile proteins, protective proteins, transport proteins, storage proteins and enzymes. Some integral proteins also serve dual roles as both a receptor and an ion channel. For example, on nerve cells, there are receptors that bind neurotransmitters like dopamine which leads to a chemical reaction within the cell.

Proteomic analysis techniques like  mass spectrometry and X-ray crystallography are often used to study, identify, and analyze the characteristics and structure of a protein.

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