How do you write chemical symbols?

Answer:

Explanation:

Convert 55lbs to kg

(55 lb)*(453.6 g/lb) = 24948 g or 249.48 kg

Density of zinc = 7140 kg/m^3

Find the volume occupied by 249.48 kg:

  (249.48 kg)/(7140 kg/m^3) = 0.055 m^3

Density of silver = 10,490 kg/m^3

Mass of Ag in 0.055m^3:

  (0.055m^3)*(10,490 kg/m^3) = 577 kg

Yes, temperature does have an effect on the solubility of organic solids in a solvent. As temperature increases, the solubility of organic solids generally increases as well.

Effect of temperature on solubility of organic solids in a solvent is as follows :-

Generally, the solubility of organic solids in a solvent increases with increasing temperature. This is because as temperature increases, the kinetic energy of the particles in the solvent increases, making them more likely to break apart the bonds in the solid and dissolve it.

However, this relationship may not hold true for all organic solids, as some may have a decrease in solubility at higher temperatures due to changes in their molecular structure. Additionally, the type of solvent used can also affect the solubility- for example, some solvents may have a higher solubility for organic solids at lower temperatures.

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For each given acid we have to determine whether it is a strong acid or weak acid,

a. The acid "HNO₃" is a - Strong acid

b. The acid "HCl" is - Strong acid

c. The acid "HBr" is - Strong acid

d. The acid "H₂SO₄" is - Weak acid

(Expression for acid ionization constant: Ka = [H⁺][HSO⁴⁻]/[H₂SO₄])

In the given list of acids:

a. HNO₃ is a strong acid because it completely dissociates in water to produce H⁺ ions and NO³⁻ ions.

b. HCl is a strong acid because it fully dissociates in water to form H⁺ ions and Cl⁻ ions.

c. HBr is a strong acid as it ionizes completely in water to produce H⁺ ions and Br⁻ ions.

d. H₂SO₄ is a weak acid as it only partially dissociates in water, resulting in the presence of both undissociated H₂SO₄ molecules and H+ ions.
The expression for the acid ionization constant (Ka) is given as [H+][HSO⁴⁻ ]/[H2SO4], where [H⁺], [HSO⁴⁻], and [H₂SO₄] represent the concentrations of the respective species in the equilibrium equation.

The classification of acids as strong or weak depends on their ability to ionize in water.

Strong acids fully dissociate, producing a high concentration of H+ ions, while weak acids only partially dissociate, resulting in a lower concentration of H+ ions.

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Answer:

A. 35

B. 7

C. halogênios

Explanation:

Aqui, para responder a essa pergunta, precisaremos conhecer o elemento particular em questão.

..... 4s ^ 2 3d ^ 10 4p ^ 5 significa que está a cinco elétrons da configuração eletrônica do último elemento na primeira camada dos metais pesados.

O último elemento da 1ª série do elemento de transição é o zinco, portanto, como está a apenas 5 elementos de distância, o átomo de que estamos falando é o átomo de Bromo de Bromo.

A. O zinco tem um número atômico 30 e como o bromo está a 5 elementos de distância, seu número atômico é 35

B. Uma vez que pertence ao grupo halogênio, tem 7 elétrons de valência como o resto da família

C. Pertence à família dos halogênios

Answer:55ml

Explanation:

Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.

To determine the amount of N2 produced in the reaction between dinitrogen tetroxide (N2O4) and excess hydrazine (N2H4), we need to consider the stoichiometry of the reaction.

The balanced equation for the reaction is:

N2H4 + N2O4 → N2 + 2H2O

According to the stoichiometry of the reaction, for every one mole of N2H4, one mole of N2 is produced. The molar mass of N2H4 is approximately 32.05 g/mol.

Given that the rocket is designed to hold 1.35 kg (1350 g) of N2O4, we can calculate the moles of N2H4 required:

Moles of N2H4 = Mass of N2O4 / Molar mass of N2O4

Moles of N2H4 = 1350 g / 92.01 g/mol ≈ 14.67 mol

Since the stoichiometry is 1:1, the amount of N2 produced will be equal to the moles of N2H4:

Moles of N2 produced = Moles of N2H4 ≈ 14.67 mol

Expressing this answer in scientific notation, the amount of N2 produced according to the engineer's design would be approximately 1.467 x 10^1 mol.

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Water's high specific heat capacity is the property caused by the hydrogen bonding among water molecules. When heat is absorbed, hydrogen bonds will broken and the water molecules can move freely.

When the temperature of the water will decreases, then the hydrogen bonds are formed as well as release a considerable amount of energy.

Hydrogen bonds will allow the ions and the other polar molecules to dissolve in water. Therefore, water is an excellent solvent. The hydrogen bonds between the water molecules causes the water to have a high heat capacity, means it takes a lot of added heat to raise its temperature.

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Magnesium and fluorine atoms will most likely form an ionic bond.

Ionic bonds are formed between elements with a large difference in electronegativity, which is the measure of an atom's ability to attract electrons towards itself. Magnesium and fluorine have a difference in electronegativity of 2.13, which is large enough to form an ionic bond.

In ionic bonds, one atom loses electrons and becomes a positively charged ion (cation), while the other atom gains electrons and becomes a negatively charged ion (anion). In this case, magnesium will lose two electrons to become Mg2+ and fluorine will gain one electron to become F-. These two ions will then attract each other electrostatically to form magnesium fluoride (MgF2), which is an ionic compound.

On the other hand, covalent bonds are formed between elements with a small difference in electronegativity, where atoms share electrons to achieve a stable electron configuration. Magnesium and fluorine have a large electronegativity difference, so they are unlikely to share electrons and form a covalent bond. Therefore, magnesium and fluorine will most likely form an ionic bond.

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Answer:

Fossil fuels are made naturally, however they are considered non-renewable since they take such a long time to form.

A polyatomic ion, which is a grouping of atoms, can indeed have a charge. Monatomic ions have a charge due to an imbalance in the number of protons and electrons for the same reason.

Polyatomic ions are made up of two or more atoms that are covalently bonded, much to the structure of a neutral molecule. This cluster of covalently bonded atoms has different ratios of electrons to protons, as the name suggests. The terms "atomic ion" or "monatomic ion" can be used to refer to an ion that is made up of of one particular type of atom, with each atom having some sort of net charge, either positive or negative. the case where an ion has two or more atoms.

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Answer:

yea I'm also looking for this question to .

Answer:

2000J

Explanation:

heat needed = mass × specific heat capacity × change in temperature

heat needed= 100×0.2×100

=2000J

Answer:

2

Explanation:i did the test

The carbon intermediate generated via homolytic bond cleavage of a C-C sigma bond is called a carbon radical.

When a C-C sigma bond undergoes homolytic bond cleavage, it means that the bond is broken in a way that each bonding electron is split equally between the two carbon atoms. This process leads to the formation of two carbon radicals.

A radical is a highly reactive species that possesses an unpaired electron. In the case of the carbon radical generated from the cleavage of a C-C sigma bond, one carbon atom retains the unpaired electron, while the other carbon atom also possesses an unpaired electron. These carbon radicals are represented as •C and •C, where the dot represents the unpaired electron.

Due to the presence of the unpaired electron, carbon radicals are highly reactive and tend to participate in chemical reactions to attain stability. They can engage in various reactions, such as radical addition, radical substitution, or radical polymerization, by either accepting or donating an electron to another atom or molecule.

Overall, the carbon intermediate generated via homolytic bond cleavage of a C-C sigma bond is known as a carbon radical, which is a highly reactive species with an unpaired electron.

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The sketch of two amino acid side by side is given above.

Amino acid is defined as the acid which contains two functional groups which are carboxylic group, -COOH and ammine group, -NH2.

When the two or more than two molecules of amino acids join together by forming peptide bond, they produces polypeptide chain or protein.

The bond which is present inbetween two amino acid is called a peptide bond.

The peptide bond is defined as a chemical bond which is formed inbetween the two or more molecules when nitrogen which is present in one amino acid react with the carbon of another amino acid by releasing a molecules of water.

Thus we concluded that the two amino acid bond by forming peptide bond.

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If one were to construct a galvanic cell consisting of two Zn2 /Zn electrodes at two different concentrations, the more concentrated cell will be the anode

In a galvanic cell, the more concentrated solution is typically associated with the anode, while the less concentrated solution is associated with the cathode. This is because, in the anode compartment, the metal electrode undergoes oxidation and releases metal ions into solution, resulting in an increase in the concentration of metal ions.

In contrast, in the cathode compartment, metal ions from the solution are reduced onto the metal electrode, resulting in a decrease in the concentration of metal ions.

Therefore, in the case of a galvanic cell consisting of two Zn2+/Zn electrodes at two different concentrations, the more concentrated cell would be associated with the anode.

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Full Question: If one were to construct a galvanic cell consisting of two Zn2 /Zn electrodes at two different concentrations, the more concentrated cell will be the _____. Multiple choice questions.

Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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The formula for the relationship between weight and blood pressure in children is:

We differentiate the above function with respect to x Therefore:

Rate of change at the 70-pound weight level:

Blood is a fluid found in all living things that functions to deliver substances and oxygen needed by body tissues, transports chemical products of metabolism, and also acts as the body's defense against viruses or bacteria. Blood has the function of regulating acid and base balance. ,transports O2, carbohydrates, and metabolites, regulates body temperature by conduction or conduction, carries body heat from heat production centers (liver and muscles).

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Rules that Casey breaks:

He didn't carefully examine the glassware before utilizing it.

Lab safety rules:

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The pH of the solution is approximately 1.093.

To solve this problem, we need to use the equation for the neutralization of an acid and a base:

acid + base → salt + water

In this case, the acid is HCl and the base is NaOH, so the balanced equation is:

HCl + NaOH → NaCl + H2O

According to the equation, 1 mole of HCl reacts with 1 mole of NaOH to produce 1 mole of NaCl and 1 mole of water. We can use this fact to determine how much of each reactant is used up in the reaction.

First, we need to calculate the number of moles of HCl and NaOH in the solution:

moles of HCl = concentration × volume = 0.249 M × 0.0407 L = 0.01015 moles

moles of NaOH = concentration × volume = 0.108 M × 0.0364 L = 0.00394 moles

Next, we need to determine which reactant is limiting. The limiting reactant is the one that is completely used up in the reaction, and determines how much product can be formed. To do this, we compare the number of moles of each reactant:

HCl:NaOH = 0.01015:0.00394 = 2.58:1

Since the ratio is greater than 1:1, we can see that HCl is in excess and NaOH is limiting.

Therefore, all the NaOH will react with the HCl to form NaCl and water:

NaOH + HCl → NaCl + H2O

The number of moles of NaOH used up is equal to the number of moles of HCl that reacts:

moles of NaOH used up = 0.00394 moles

The remaining moles of HCl that did not react is:

moles of HCl remaining = 0.01015 - 0.00394 = 0.00621 moles

To calculate the concentration of the NaCl solution formed, we divide the number of moles of NaCl by the total volume of the solution:

total volume = 40.7 mL + 36.4 mL = 77.1 mL = 0.0771 L

moles of NaCl = moles of NaOH used up = 0.00394 moles

concentration of NaCl = moles of NaCl / total volume = 0.00394 moles / 0.0771 L = 0.0511 M

Finally, we can calculate the pH of the solution using the formula:

pH = -log[H+]

Since NaCl is a salt of a strong acid (HCl) and a strong base (NaOH), it will not contribute to the pH of the solution. Therefore, the pH is determined by the excess H+ ions from the HCl. To calculate the concentration of H+ ions in the solution, we can use the following formula:

[H+] = moles of HCl remaining / total volume

[H+] = 0.00621 moles / 0.0771 L = 0.0804 M

pH = -log[H+] = -log(0.0804) = 1.093

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Answer:

They are being formed as a type of methane which we cannot use

Explanation:

The result obtained by converting 20 quibs of skvarnick to sleps, given that 5 quibs of skvarnick is equal to 3 sleps, is 12 sleps

We can convert quibs to sleps by using the following conversion scale:

5 quibs of skvarnick = 3 sleps

With the above conversion scale we can convert 20 quibs of skvarnick to sleps as illustrated below:

5 quibs of skvarnick = 3 sleps

Therefore,

20 quibs of skvarnick = (20 quibs × 3 sleps) / 5 quibs

20 quibs of skvarnick = 12 sleps

Thus, from the calculation made above, we can conclude that 20 quibs is equivalent to 12 sleps

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Answer: Your answer is a Sea breeze

A sea breeze, much like the majority of weather conditions experienced at the coast, is the result of the contrasting way in which the land and ocean react to changes in temperature

Hope this helps!

Answer:

A sea breeze,

Explanation:

also known as an onshore breeze, occurs because of the differences in air pressure created by the difference in temperature between the ocean or water and the dry land.

The plausible electron dot structures of I₂, OF₂, H₂S, NI₃ substances are attached below.

Lewis dot structures, also known as electron dot structures, are diagrams that show how atoms in a molecule are chemically bonded to one another. They also show how many lone pairs there are in total among all the atoms that make up the molecule.

An electron configuration writing guide. The shell number (n) comes first in the symbols used to represent the electron configuration, followed by the type of orbital and, finally, a superscript that represents the number of electrons in the orbital. Examples include As you can see from the periodic table, oxygen has 8 electrons.

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Answer:

1.20 mole

Explanation:

1 Mole of Cu reacts to form  =  1 Mole of Hg

(1.20 mol × 1 mol) ÷ 1 mol

1.20 mol of Hg

To be considered a true hydrate, a compound must follow a few rules, and one of these rules is the color being the same before and after heating. In this case we have a difference in the color, the residue after heating when dissolved in water is forming a yellow brown solution, and in the meanwhile, a colorless solution is formed when a sample of the original compound is dissolved in water, which is not a characteristic of a true hydrate.

Answer:

epic

Explanation:

hakuna matata

In the given sample of the Earth's crust with a volume of 15 cm3 and a mass of 39.75 grams, over 80% of the material is silicon dioxide (SiO2).

To calculate the mass of silicon dioxide in the sample, we need to determine the amount of silicon dioxide present based on the given percentage and then calculate its mass.

The given sample is stated to contain over 80% silicon dioxide. Let's assume it contains exactly 80% for calculation purposes. This means that 80% of the sample's mass is due to silicon dioxide.

To find the mass of silicon dioxide, we can calculate it as follows:

Mass of silicon dioxide = 80% * mass of the sample

Mass of silicon dioxide = 0.80 * 39.75 grams

By performing the calculations, we can determine the mass of silicon dioxide present in the sample. It's important to note that the actual percentage may be slightly different from 80%, but this calculation provides an estimate based on the given information.

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