I am the least massive metalloid of period 4. Who am I?

Answer:

correct formula: C2F4

Explanation:

tetra means 4. There are 2 C and 4 F in dicarbon tetrafluoride.

The bond that holds the amino acids is called the peptide bond and the bond is formed by the reaction between the -COOH group and the -NH2 group.

The amino acids are the compounds that can be formed by the reaction of the carbonyl group of the acid and the amide group.

Amino acids are the building blocks of proteins. They are organic compounds containing both a carboxyl (-COOH) and an amino (-NH2) group, as well as a unique side chain (R group) specific to each amino acid.

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Answer:

The answer is the skin of the apple

Answer:

Br-Ag-Br

Explanation:

Answer:

26

Explanation:

The atomic number of an atom describes the number of protons within its nucleus. Since the ion has 26 protons, the atomic number must be 26.

Answer:

c

Explanation:

boulder was at rest on top of a hill so it contains abundant potentialenergy. When the boulder falls, its potential energy will change to kinetic energy, the energy of motion. When the boulder stops moving, its kinetic energy will transform back to potential energy

Answer:

\(V=1.3x10^5cm^3\)

Explanation:

Hello,

In this case, since the volume is obtained by multiplying the length, width and height of the box:

\(V=W*L*H\)

Given each dimension we find:

\(V=423cm*12cm*25cm\\\\V=126900cm^3\)

Nevertheless, since the shortest number is 12, we need to show the volume with two significant figures and in scientific notation as follows:

\(V=1.3x10^5cm^3\)

Best regards.

Heat is added to ice at 0 °C. Explain why the temperature of the ice does not change. What does change?When heat is added to ice at 0°C, the temperature of the ice does not change. This happens because all the heat energy is used up in overcoming the intermolecular forces of attraction (hydrogen bonds) that exist between the water molecules in ice.

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The correct answer is A. There are 6 carbon atoms, 12 hydrogen atoms, and 18 oxygen atoms on the reactant side, and 6 carbon atoms, 12 hydrogen atoms, and 18 oxygen atoms on the product side.

This is because of the law of conservation of matter, which states that matter cannot be created or destroyed by a chemical reaction. Therefore, the number of atoms of each element must remain the same on both sides of the reaction.

In this case, the number of carbon, hydrogen, and oxygen atoms must remain the same on both the reactant and product sides.

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Answer:

4.03 moles

Explanation:

We know that the molar mass of Carbon is 12.011, thus we can solve for moles by dividing the grams given by the molar mass.

48.4 g / 12.011 g = 4.03 moles

Out of the given choices, the amino acids that has a side chain that is capable of hydrogen bonding with other polar molecules is Ser (Serine).

In the fields of organic and biochemistry, a side chain is a chemical group that is connected to the "main chain" or backbone of a molecule and serves as an attachment point for other parts of the molecule. A molecule's side chain is a hydrocarbon branching element that is coupled to a larger hydrocarbon backbone. This element is known as the side chain. There is only one amino acid on this list that possesses a R group that is able to form a hydrogen bond, and that is serine.  Both serine and threonine have hydroxyl groups located on the side chains of their amino acids. Because these polar groups are located so close to the main chain, they are able to make hydrogen bonds with the main chain.

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Answer:

EDG 2020

Explanation:

It comes from older rocks,It forms from sediments,it is one of the main 3 rocks, con form from materials solidified from solution.

Answer:

It comes from older rocks.

It forms from sediments.

It is one of the three main types of rocks.

It can form from materials solidified from solutions,

Explanation:

Stars form in large, dense regions of gas and dust known as molecular clouds. These clouds are located primarily in the spiral arms of galaxies, where they are exposed to intense radiation from nearby stars. As the gas and dust in these clouds are subjected to this radiation, they begin to collapse under their own gravity. As the collapse continues, the cloud becomes denser and denser, and eventually a protostar forms at its center. Over time, this protostar continues to contract and heat up, eventually reaching the point where nuclear fusion can begin in its core. At this point, the protostar becomes a fully-fledged star, and the process of star formation is complete.

TL;DR: Within the clouds of dust and scattered throughout most galaxies.

Answer:

This would be true good sir.

Explanation:

Have a wonderful day!

Answer:

It's better to explain it.

Explanation:

Neutrons do not affect the electron configuration, but the sum of atomic number and the number of neutrons, or neutron number, is the mass of the nucleus. You know that neutrons are found in the nucleus of an atom. Under normal conditions, protons and neutrons stick together in the nucleus. During radioactive decay, they may be knocked out of there. Neutron numbers are able to change the mass of atoms, because they weigh about as much as a proton and electron together. if your asking What is the role of a neutron in an atom? then, Neutrons are very important in providing stability for an atom. Some atoms don't "need" neutrons - The hydrogen atom does not have any neutrons. However, as the atomic number ( # of protons ) increases, the number of neutrons increases as well.

Protons don't like each other. Naturally, 'positive charges repel', so it wouldn't be possible to have more than one proton in the nucleus. Here's where the neutron comes in.

Hope this helps. :)

Answer:

0,

Explanation:

if n was 2, then 1,0,-1

Answer: metal turn orange and weaker as it gets oxidised

Explanation:

One possible reason for cooler air temperatures in Christchurch during El Niño years is the shift in atmospheric circulation patterns.

During El Niño years, Christchurch may experience cooler air temperatures due to several factors associated with the El Niño phenomenon.

El Niño is characterized by the abnormal warming of the surface waters in the eastern tropical Pacific Ocean, which has global climatic implications. While El Niño is primarily associated with changes in oceanic conditions, its effects can extend to atmospheric patterns, leading to altered weather patterns and temperature variations.

One possible reason for cooler air temperatures in Christchurch during El Niño years is the shift in atmospheric circulation patterns. El Niño can disrupt the normal global atmospheric circulation, resulting in changes in the positioning and intensity of weather systems.

This can lead to the advection of cooler air masses from the south or southeast towards Christchurch, resulting in cooler temperatures.

Another factor is the influence of El Niño on regional rainfall patterns. El Niño often leads to drier conditions in the South Island of New Zealand, including Christchurch.

Reduced cloud cover and less moisture in the air can contribute to cooler temperatures as there is less insulation from the sun's radiation and less evaporative cooling. Additionally, the absence of significant rainfall can result in less moisture in the soil, leading to cooler conditions as less energy is used for evaporation.

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One molecule of propanol contains only one -OH group and not three -OH groups or three -CH3 groups.

The -OH group is attached to the central carbon atom and makes propanol a useful solvent and intermediate in organic chemistry.Propanol is a colorless liquid that belongs to the family of alcohols. It has the formula C3H8O, and it contains three carbon atoms, eight hydrogen atoms, and one hydroxyl group (-OH) attached to one of the carbons. One molecule of propanol contains only one -OH group, which is attached to the central carbon atom.

Thus, option (2) is the correct answer, and the other options are incorrect.The -OH group in propanol is responsible for its unique chemical and physical properties. It makes propanol soluble in water and other polar solvents and gives it a high boiling point of around 97°C. The hydroxyl group can also participate in chemical reactions, such as esterification, dehydration, oxidation, and reduction. For example, propanol can be oxidized to form propanal and then propanoic acid, which is a useful synthetic intermediate for many organic compounds.Apart from the -OH group, propanol also contains two other functional groups called methyl groups (-CH3). These are attached to the two carbon atoms adjacent to the central carbon. However, the question only asks about the number of -OH groups in propanol, so the methyl groups are irrelevant.
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Answer:

i answered your other post with it

Explanation:

Answer:

Why do chemists use the mole as a counting unit? Because chemical reactions often involve large numbers of small particles, chemists use a counting unit called the mole to measure amounts of a substance. ... The discovery enabled scientists to classify certain chemical reactions as transfers of electrons between atoms.Explanation:

Chemical reactions often involve large numbers of small particles, chemists use a counting unit called the mole to measure amounts of a substance.

It is not possible to vell with a single atom or molecule because we

can't count them.

Chemists have set a number of particles with which to toil that is convenient. As molecules are very small.

Thus,  chemists use a counting unit called the mole to measure the amounts of a substance.

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Answer:

\(^{127}_{53} I\)

53 protons and electrons and 74 neutrons.

Explanation:

Hello!

In this case, since the nuclide symbol of an isotope is represented by putting the atomic mass as a prefixed superscript and the number of protons as a prefixed subscript, for I-127 we have:

\(^{127}_{53} I\)

Now we realize this isotope have 53 electrons and protons and the following number of neutrons:

\(neutrons= 127-53=74\)

Notice this isotope has about the same molar mass of the average iodine atom.

Best regards!

Answer:

Explanation:

Smoking a cigarette, snorting cocaine, or drinking yourself into oblivion are all easy habits to adopt because they light up your brain with the neurotransmitter …

The total volume of HCl(aq) used in the titration was 9.50 mL, the total volume of NaOH(aq) used was 3.80 mL, and the molarity of the sodium hydroxide solution was 0.25 M.

To determine the total volume of HCl(aq) used in the titration, we subtract the initial buret reading from the final buret reading:

Total volume of HCl(aq) = final buret reading - initial buret reading

Total volume of HCl(aq) = 25.00 mL - 15.50 mL

Total volume of HCl(aq) = 9.50 mL

To determine the total volume of NaOH(aq) used in the titration, we use the same approach:

Total volume of NaOH(aq) = final buret reading - initial buret reading

Total volume of NaOH(aq) = 8.80 mL - 5.00 mL

Total volume of NaOH(aq) = 3.80 mL

To calculate the molarity of the sodium hydroxide solution, we use the following formula:

Molarity of NaOH(aq) = (Molarity of HCl(aq) * Volume of HCl(aq)) / Volume of NaOH(aq)

Substituting the given values, we get:

Molarity of NaOH(aq) = (0.10 M * 9.50 mL) / 3.80 mL

Molarity of NaOH(aq) = 0.25 M

Therefore, the molarity of the sodium hydroxide solution is 0.25 M.

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Answer:evaluations of seismic data

Explanation:

The mass of titanium that can be obtained from 1.10 kg of the ilmenite-sand mixture is 105.2 g.

To calculate the mass of titanium that can be obtained from 1.10 kg of the ilmenite-sand mixture, we must first determine the mass of ilmenite in the mixture and then use the stoichiometry of the given chemical reactions to calculate the mass of titanium obtained from the ilmenite.Initially, we need to know the mass of the ilmenite in the 1.10 kg ilmenite-sand mixture. This is given as 22.0 % by mass. Therefore, the mass of ilmenite in 1.10 kg of the mixture can be calculated as:Mass of ilmenite = (22.0 / 100) × 1.10 kg = 0.242 kgThe first reaction is FeTiO3(s) + 3Cl2(g) + 3C(s) → 3CO(g) + FeCl2(s) + TiCl4(g)The molar mass of FeTiO3 is 151.7 g/mol, which means that 0.242 kg (or 242 g) of ilmenite corresponds to 1.598 mol. From the balanced chemical equation, 1 mol of FeTiO3 produces 1 mol of TiCl4, so 1.598 mol of FeTiO3 will produce 1.598 mol of TiCl4.Since the first reaction has a yield of 90.5 %, the actual amount of TiCl4 produced is only 90.5 % of the theoretical amount. Therefore, the mass of TiCl4 produced from the given amount of ilmenite is:Mass of TiCl4 produced = (90.5 / 100) × (1.598 mol × 189.7 g/mol) = 246.2 g.

The second reaction is TiCl4(g) + 2Mg(s) → 2MgCl2(l) + Ti(s)The balanced chemical equation shows that 1 mol of TiCl4 reacts with 2 mol of Mg to produce 1 mol of Ti. Therefore, the theoretical amount of titanium produced from 246.2 g of TiCl4 is:Amount of Ti produced = (1 / 2) × 246.2 g = 123.1 gSince the second reaction has a yield of 85.5 %, the actual amount of titanium produced is only 85.5 % of the theoretical amount.Therefore, the mass of titanium that can be obtained from 1.10 kg of the ilmenite-sand mixture is:Mass of Ti obtained = (85.5 / 100) × 123.1 g = 105.2 g.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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1.15 g of Cu are there in a sample of Cu that contains\(1.09*10^{24}\)atoms

The number of grams of Cu in a sample containing\(1.09*10^{24}\)atoms can be determined using Avogadro's number, which is \(6.02*10^{23}\)atoms/mol.

First, we need to calculate the number of moles of Cu in the sample. To do this, we divide the number of atoms by Avogadro's number to get the number of moles:

\(\frac{1.09*10^{24} atoms }{6.02*10^{23} atoms/mol }= 1.81*10^{-1 }mol\)

The sample's mass needs to be determined next. Since copper has an atomic mass of 63.55 g/mol, we can use this to determine the sample's mass:

\(1.81*10^{-1} mol * 63.55 g/mol = 1.15 g\)

Therefore, the sample contains 1.15 g of Cu.

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