How do you Convert 19mL to pL?

Answer:

liquefaction

liquefaction is a process when a something turns into a liquid.

Explanation:

In the third equation, the oxygen with atomic weight 16 undergo alpha decay and produce C₆¹³ . The alpha particle emitted is also called helium nuclei. During this decay some gamma radiations also produce as a byproduct.

It is also called as radioactive decay during which an unstable nucleus emits radiation and is transformed into the nucleus of one or more other elements.

The atom emit the alpha particles consist of two proton and two neutrons. Which is also called Helium nuclei.

When atom undergoes the alpha emission the original atom convert into the atom having mass number 4 less than and atomic number 2 less than the starting atom.

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

Hence, the oxygen with atomic weight 16 undergo alpha decay and produce C₆¹³  and an alpha particle (He)

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Answer:

Division by zero is undefined because there is no other number to divide it by.

Explanation:

Unlike 2/2, 2/0 doesn't have anything to divide the 2 by which makes it undefined and impossible to solve.

The division by zero is undefined​, because whatever response we may give, we will then have to concur that the answer times 0 = 1, which is illogical because anything multiplied by zero is zero.

Since any attempt at definition results in a contradiction, the outcome of a division by zero cannot be defined. a=r*b. r*0=a. (1) (1) But because r*0=0 for all r, there is no solution to the equation unless a=0 (1).

Again, mathematicians have left zero divided by zero as an open problem because they are both equally valid and, to be honest, neither of them is consistent with the rest of mathematics.

Mathematically, it is impossible to divide a number by zero, just as in this illustration. Or, at the very least, there isn't currently a means to do that. Numerous attempts have been made to figure out how to divide by zero, as mathematicians are constantly looking for solutions to intriguing mathematical issues.

Thus, The division by zero is undefined​, because whatever response we may give, we will then have to concur that the answer times 0 = 1.

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Answer:

  The cell membrane is inside the cell wall

Explanation:

Detergent enzymes are better because they help limit phosphate pollutants in the environment. Option 3.

Phosphates are a common ingredient in traditional laundry detergents, but they can have harmful effects on the environment.

When phosphate-containing detergents are used, the phosphates can end up in waterways and cause excessive algae growth, leading to decreased oxygen levels in the water and harm to aquatic life.

Enzyme-based detergents can be a more environmentally friendly option as they do not contain phosphates, reducing the amount of phosphate pollution released into the environment.

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Answer:

cool

Explanation:

Answer:hydrogen, deuterium, and tritium.

Explanation:

Answer:

0.0011 moles

Explanation:

Recall that;

Number of moles = mass of substance/ molar mass of the substance

Mass of asprin = 0.2001 g

Molar mass of asprin = 180.158 g/mol

Number of moles =  0.2001 g/180.158 g/mol

Number of moles = 0.0011 moles

By the concept of calculating moles ,it can br concluded that the no. of atoms of phosphorus in 8.80mol of copper(II) phosphate is=1.06\(x10^{25}\)

A mole is defined as amount of substance containing as many as elementary entities that are there in atoms of exactly 12 g of carbon-12.Therefore we can say,1 mole of copper(II) phosphate, Cu3(PO4)2, contains three moles of copper(II) cations and two moles of phosphate anions.

Again 1mole of phosphate anions contains one mole of phosphorus and four moles of oxygen.Considering all these informations we can conclude that:1 mole of copper(II) phosphate contains 2 moles of Phosphorus

Accordingle the sample contains=(8.80\(x\)2) moles of Phosphorus

                                    =(17.6\(x\)Avogadro's constant) atoms of  Phosphorus

                                    =(17.6\(x\)6.022\(x\)\(10^{23}\)) atoms of  Phosphorus

                                    =1.06\(x10^{25}\) [approx] no. of Phosphorus atoms

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In 8.80 moles of copper(II) phosphate, there are approximately 1.06 x 10²⁵ atoms of phosphorus.

The number of atoms of phosphorus in a given amount of a compound can be calculated using the concept of mole in chemistry. Copper(II) phosphate is Cu3(PO4)2, containing 2 moles of phosphorus (P) for every 1 mole of the compound. Avogadro's number (6.022 x 10²³) gives the number of atoms in one mole.

So, if there are 8.80 moles of copper(II) phosphate, there would be 2 × 8.80 moles of phosphorus. Multiplying this by Avogadro's number gives the total number of phosphorus atoms.

Therefore, the number of phosphorus atoms is 2 × 8.80 × 6.022 x 10²³ = 1.06 x 10²⁵ atoms of phosphorus.

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To dilute a solution of sodium chloride (NaCl), we can use the following methods: Add more water to the solution and Remove a small amount of the solution and mix it with water.

By adding water, you increase the overall volume of the solution, which effectively reduces the concentration of NaCl. This is the most common and straightforward method of dilution.

By taking out a portion of the concentrated solution and mixing it with water, you decrease the concentration of NaCl in that portion, resulting in overall dilution when you combine it back with the rest of the solution.

By heating the solution, you cause the water to evaporate, leaving behind a more concentrated solution of NaCl. This process does not dilute the solution but rather concentrates it further.

Adding more NaCl to the solution would actually increase the concentration, not dilute it. Therefore, it is not a valid method for dilution.

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Answer:

B

Explanation:

this is because solution is the mixture of a solvent and a solute to give you a solution

Answer:

B. The mixture of one substance dissolved in another

Explanation:

Answer:

sp3d2 ?

Explanation:

sp³d² hybrid orbitals are formed  by a central atom in a molecule which is sharing a total of 12 electrons.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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The following elements which you would expect to be least metallic is Se and is therefore denoted as option B.

These are chemical elements that are usually shiny solids that conduct heat or electricity and examples include iron, tin etc.

Se is known as Selenium and it is the element which is the least metallic element, because it is the farthest to the right when compared to the other options provided. We should note that metallic character decreases going across a period which is therefore the reason why it was chosen as the correct choice.

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Answer:

b. the type of container

Explanation:

Answer:

The type of container

Explanation:

Just took the test

Answer:

try to see THE PIXELS, AVENGERS, JOKER, CHARLIE'S ANGEL, JUSTICE LEAGUE,IT ,THE NUN ETC

Answer:

watch movie COCO and croods a new age

Answer:

Energy equals mass times the speed of light squared.

Explanation:

can i get brainliest? lol :) hope that helps

Answer:

E=mc2 means energy equals matter to the speed of light by the power of 2

Explanation:

Answer:

1. to latch onto and let go of eggs

2. how quickly electrical energy moves in a circuit

3.  when a current runs through a conductor

4. Electrons are moved through a circuit, creating a current. That current interacts with a magnet, moving the conductor in the orientation of the field.

5.  electromagnetic field

D.) HF of the following molecules contain POLAR COVALENT bonds

A polar covalent link holds a hydrogen atom and a fluorine atom together in a hydrogen fluoride (HF) molecule.

The molecule that has a polar covalent link in it is c. H-F since fluorine and hydrogen atoms have different electronegativities, which causes the bond to become polarised.

A polar molecule is one that has a little positive charge on one end and a slight negative charge on the other. A polar molecule is a diatomic compound, such as HF, that has a polar covalent link.

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The balanced chemical equation for the decomposition of aspirin (acetylsalicylic acid) is:

\(2C_{9}H_{8}O_{4} (aspirin) → 2C_{7}H_{6}O_{3} (salicylic acid) + 2CO_{2} (Carbon dioxide) + H_{2}O (water)\)

In this reaction, the aspirin molecule breaks down into salicylic acid, carbon dioxide, and water. The reaction is typically catalyzed by heat or exposure to acidic or basic conditions.

Aspirin, or acetylsalicylic acid, contains ester functional groups that can undergo hydrolysis. Under suitable conditions, the ester bond in aspirin is cleaved, leading to the formation of salicylic acid, which is the primary decomposition product. Additionally, carbon dioxide and water are released as byproducts of the reaction.

The balanced equation shows that for every two molecules of aspirin, two molecules of salicylic acid, two molecules of carbon dioxide, and one molecule of water are formed. Understanding the decomposition of aspirin is important in pharmaceutical and chemical industries to ensure the stability and shelf-life of the compound, as well as to study its breakdown products and potential side reactions.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{3.13 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{3.13}{6.02} \\ = 0.519933\)

We have the final answer as

Hope this helps you

Tin metal is mixed with hydrobromic acid, creating a metal within acid situation. Therefore, in this instance, the metal is attempting to replace the hydrogen within it. (For more detail scroll down)

The distance between the hydrogen and halogen atoms increases as the anion's size expands. It gets simpler to release H+ ions from hydracids as we move lower in the halogen group. Therefore, HI>HBr>HCl>HF is the sequence of acid strength.

Since tin is higher up, it will be able displace hydrogen from the acid to create the hydrogen gas. Tin can remove the hydrogen from the solution because it is more dense than hydrogen.

Sn(s) +2 HBr(aq) ----->SnBr2(aq) +H2(g)

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Answer:

ok, here is your answer

Explanation:

AI-generated answer

To find the mass of oxygen that reacted, we need to use the Law of Conservation of Mass, which states that in a chemical reaction, the mass of the reactants equals the mass of the products.

First, we need to find the number of moles of hydrogen that reacted:

Molar mass of hydrogen (H₂) = 2.016 g/mol

Number of moles of H₂ = mass/molar mass = 46.2 g/2.016 g/mol = 22.92 mol

Next, we need to use the balanced chemical equation to find the number of moles of water produced:

hydrogen + oxygen → water

2H₂ + O₂ → 2H₂O

From the equation, we can see that for every 2 moles of H₂, 1 mole of O₂ is required to produce 2 moles of H₂O. Therefore, the number of moles of O₂ required to produce 22.92 moles of H₂O is:

Number of moles of O₂ = 1/2 x 22.92 mol = 11.46 mol

Finally, we can find the mass of oxygen that reacted by using its molar mass:

Molar mass of oxygen (O₂) = 32.00 g/mol

Mass of oxygen = number of moles x molar mass = 11.46 mol x 32.00 g/mol = 366.72 g

Therefore, the mass of oxygen that reacted is 366.72 g.

The solubility (in g salt/100 g of H2O) of the salt is determined as 52.75 g salt.

The solubility of the salt in the given volume of water and temperature is calculated as follows;

4.8/9.1 = x/100

9.1x = 100 x 4.8

9.1x = 480

x = 480/9.1

x = 52.75 g salt

Thus, the solubility (in g salt/100 g of H2O) of the salt is determined as 52.75 g salt.

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The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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The considerations which are applicable in a suitable recrystallization solvent are: should have a boiling point that is ~ 30-50 °C, Should be unreactive, Offers minimal solubility and solubility-temperature relationship. Option A, C, D and E will be correct.

This statement is true. Because the solvent should have a boiling point that is around 30-50 °C higher than the melting point of the compound to be recrystallized in order to achieve efficient dissolution and crystal formation.

This statement is false. Because a good recrystallization solvent should dissolve the compound of interest well at high temperatures but not at all or only slightly at lower temperatures. Ideally, the impurities should dissolve well at all temperatures, so that they can be separated from the compound of interest during the filtration step.

This statement is true. Because the solvent should not react with the compound of interest, which would affect the purity of the final product.

This statement is true. Because the solvent should have minimal solubility for the compound to be purified at room temperature and lower temperatures, but should dissolve the compound well at higher temperatures in order to achieve efficient recrystallization.

This statement is true. Because the solubility-temperature relationship for the solvent and the compound should have a low slope in order to achieve efficient recrystallization.

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--The given question is incorrect, the correct question is

"Which of the following considerations are applicable when choosing a suitable recrystallization solvent? (TRUE / FALSE) A) Should have a boiling point that is ~ 30-50 °C above room temperature. B) Does not dissolve impurities at all temperatures or completely dissolves impurities at all temperatures. C) Should be unreactive toward the compound of interest. D) Offers minimal solubility of the compound to be purified at room and lower temperatures. E) Its solubility-temperature relationship to the compound should give a curve with a low slope."--

The enthalpy of combustion for 1kg of urea is -1223525.84 J/mol.

Urea is a compound that is used in fertilizers and in some plastics.The enthalpy of combustion for urea is the amount of energy that is released when urea is burned. In order to calculate the enthalpy of combustion for 1kg of urea, we need to use the information that is provided to us in the question. Let us start by writing down the balanced equation for the combustion of urea: CO(NH2)2 + 3/2 O2 → CO2 + 2H2O + N2
The balanced equation shows that 1 mole of urea reacts with 1.5 moles of oxygen gas to produce 1 mole of carbon dioxide, 2 moles of water, and 1 mole of nitrogen gas. The enthalpy change for this reaction is equal to the amount of energy that is released when 1 mole of urea is burned.
The heat of combustion (ΔHc) of urea is -632.6 kJ/mol. This means that 632.6 kJ of energy is released when 1 mole of urea is burned. We know that 12g of urea raised the temperature of water by 30°C. We can use this information to calculate the amount of energy that was released when 12g of urea was burned.
The specific heat capacity of water is 4.18 J/g°C. This means that it takes 4.18 J of energy to raise the temperature of 1 gram of water by 1°C. Therefore, it takes 4.18 x 1000 = 4180 J of energy to raise the temperature of 1 kg of water by 1°C.
We know that 12g of urea raised the temperature of water by 30°C. Therefore, the amount of energy that was released when 12g of urea was burned is:
Energy = mass x specific heat capacity x temperature change
Energy = 0.012 kg x 4180 J/kg°C x 30°C
Energy = 1497.6 J
We can now use this information to calculate the enthalpy of combustion for 1kg of urea:
Enthalpy of combustion = energy released / moles of urea burned
Enthalpy of combustion = 1497.6 J / (0.012 kg / 60.06 g/mol)
Enthalpy of combustion = - 1223525.84 J/mol
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Answer:

is easy to poiling

Explanation:

also is dificult to melting

Answer:

approximately 251.55 grams of AuCl3 would contain 5.0 x 10^23 molecules.