5) The phase of matter where particles at extremely high temperatures become ionized

The question requires us to calculate the amount of solution that could be prepared from 1.85 g of silver nitrate (AgNO3), considering a 5.0% solution.

Considering that 5.0% solution corresponds to a solution where there are 5g of AgNO3 in 100 g of solution (% m/m), we can write:

5.0 g of AgNO3 ---------- 100 g of solution

1.85 g of AgNO3 --------- x

Solving for x, we have that 37g of a 5.0% solution could be prepared from 1.85g of AgNO3.

Answer:

what are you asking?

Explanation:

This is a microscope.

Hope this clears that up for you.

If we remove an electron from a stable atom, the atom becomes electrically incomplete/unbalanced. That is, there are more protons in the nucleus (positive charges) than there are electrons (negative charges). With an electron removed, the atom possesses a plus one charge, therefore it is a positive ion.

The atomic number of sulfur = 16. Hence, in the Sulfur nucleus, 16 protons and 16 electrons (revolving the nucleus).

Now, if 2 protons and 2 electrons are removed from sulfur then number of protons = (16-2) = 14 and number of electrons = (16-2) = 14.

So, the new element has 14 protons and 14 electrons. Silicon atom has 14 protons and 14 electrons. So, the new element is Si.

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The following chemical equation 2C8H18(g)+ 25O2(g)→ 16CO2(g)+ 18H2O(g) is balance and 48.64 grams of oxygen is required in the combustion of octane in gasoline.

When burning of petrol happens and releases toxic hydrocarbons and carbon dioxide gasses with some amount of oxygen is known as combustion.

The balanced chemical equation is 2C8H18(g)+ 25O2(g)→ 16CO2(g)+ 18H2O(g),

                      number of moles = mass / molar mass

substituting the value in equation,

                      number of moles = 14 / 114g = 0.122 moles.

number of moles of oxygen 0.122 × 0.122 moles. = 1.52 moles.

                    1.52 = mass / 32

                      mass = 48.64 gram.

Therefore,48.64 grams of oxygen is required in the combustion of octane in gasoline.

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The balanced chemical equation would be as follows,

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

105.26  grams of oxygen are required to react with 14.0 grams of octane ( C8H18 ) in the combustion of octane in gasoline.

A chemical reaction is a process in which one or more substances, also known as reactants are converted to one or more different substances, known as products. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products

The balanced chemical equation would be as follows,\

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

114 grams of octane ( C8H18 ) require 400 grams of oxygen

1 gram of octane requires 400/114 grams of oxygen

30 grams of octane require 400/114×30 grams of oxygen

30 grams of octane require 105.26  grams of oxygen

Thus,105.26  grams of oxygen are required to react with 14.0 grams of octane ( C8H18 ) in the combustion of octane in gasoline.

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Answer:

MSDSs list Liquid Paper as containing titanium dioxide, solvent naphtha, mineral spirits, resins, dispersant, and fragrances. Liquid Paper came under scrutiny in the 1980s, due to concerns over recreational sniffing of the product. The organic solvent 1,1,1-trichloroethane was used as a thinner in the product.

Explanation:

According to the stoichiometry of the chemical reaction,0.713 moles of water can be made when 134.9 grams of HNO₃ are consumed.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

378.24 g nitric acid gives 36 g water, thus 134.9 g nitric acid gives 134.9×36/378.24=12.83 g which is 12.83/18= 0.713 moles.

Thus,0.713 moles of water can be made when 134.9 grams of HNO₃ are consumed.

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Answer:

Option A, 66.5

Explanation:

use q (heat) = m(mass) * cp(specific heat) * deltat (change in temp)

q= 1172, m = 45.8, cp = 0.385

1172= (45.8) * (0.385) * Delta T

1172= 17.633 *DeltaT

1172/17.633 =DeltaT

66.5 =DeltaT

Neurons mostly receive signals that are excitatory ; others, however, are  inhibitory.

A neuron will generate action potentials more often when it receives more excitatory than inhibitory inputs.A neuron receives both excitatory and inhibitory inputs from the many other neurons it is connected to at synaptic junctions.

                   For an action potential to be generated in a neuron, the sum of the excitatory inputs must be greater than that of the inhibitory inputs.

Neurotransmitters are the chemical messengers in the body, which are released by the axon terminal of neuron ( also called nerve cell) and transmit nerve impulse to the neighboring cell ( which could be a muscle cell or a nerve cell) .

There are primarily two types of neurotransmitters that are-

1) Excitatory neurotransmitter and 2) Inhibitory neurotransmitter.

Inhibitory neurotransmitter have inhibitory effects on the neuron that is they reduce the chances that a neuron will fire an action potential. In other words, they are responsible for slowing signals between neurons.

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Using Bohr's equation for the energy levels of the electron in the Hydrogen atom, determine the energy in J of an electron in the n=4 level.

According to Boh'rs equation we can calculate the energy using this equation:

En = - 2.18 * 10⁻¹⁸ J / (n²)

So if we want to find the energy we only have to replace n by 4 and solve that calculation:

since n = 4

En = - 2.18 * 10⁻¹⁸ J / 4²

En = - 2.18 * 10⁻¹⁸ J / 16

En = -1.36 * 10⁻¹⁹ J

So the answer is option D

Answer:

1. water to ice [freezing]

2. liquid to jelly [cooling]

hope it helps

Answer:

Heterogeneous mixture...is the answer

The dude above me is right. I thought he was wrong, so I put A but it turns out he was right!

Answer:

Answers are numbered below:

Explanation:

"The three parts of the cell theory are as follows: (1) All living things are made up of cells, (2) Cells are the smallest units (or most basic building blocks) of life, and (3) All cells come from preexisting cells through the process of cell division..."

I hope this helps you! Have a great day!

Answer:

0.571moles

Explanation:

The Avogrado's number or constant denoted by NA will be used for this question.

The Avogrado's number = 6.022 × 10^23 particles, is contained in 1 mole of a substance.

To get the number of atom/particles in a substance, the formula: N= n × NA is used.

Where; N= Number of atoms in

substance

n= number of moles

NA= Avogadro's constant

Hence, to find the number of moles of copper equivalent to 3.44 × 10^23, we say: n= N / NA

That is, n = 3.44 × 10^23 / 6.022 × 10^23

= 0.5712

Therefore, 0.571 moles of Copper (Cu) is equivalent to 3.44 × 10^23 atoms of Copper.

A)    The mass of one molecule of SiO2 is 60.08 g/mol / Avogadro's number (6.022 x 10^23) = 9.97 x 10^-23 g/molecule, to three significant figures.

B) the mass fraction of the silicon atom in SiO2 is:

mass of silicon / total mass of SiO2 = 28.10 g/mol / 60.08 g/mol = 0.468, or 47% to two significant figures.

A) The molar mass of SiO2 can be calculated by adding the atomic masses of silicon (Si) and two oxygen (O) atoms:

Molar mass of SiO2 = 1 x atomic mass of Si + 2 x atomic mass of O

= 1 x 28.09 g/mol + 2 x 15.99 g/mol

= 60.08 g/mol

Therefore, the mass of one molecule of SiO2 is 60.08 g/mol / Avogadro's number (6.022 x 10^23) = 9.97 x 10^-23 g/molecule, to three significant figures.

B) The mass of the silicon atom in SiO2 can be calculated as follows:

The mass of two oxygen atoms is 2 x atomic mass of O = 2 x 15.99 g/mol = 31.98 g/mol.

Subtracting this mass from the total mass of SiO2 gives the mass of the silicon atom:

60.08 g/mol - 31.98 g/mol = 28.10 g/mol

Therefore, the mass fraction of the silicon atom in SiO2 is:

mass of silicon / total mass of SiO2 = 28.10 g/mol / 60.08 g/mol = 0.468, or 47% to two significant figures.

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Explanation: Number of moles of water = mass of water/ molar mass.  

Molar mass of H2O = (1*2) + 16 = 18.0  

 Now we only need to calculate the number of moles of water.  

The chemical reaction is as follows  

CH4 + 2O2 ---> CO2 + 2H2O  

From the eqn, the moles of H2O = 2*moles of CH4  

Molar mass of CH4 = 12 + 4 = 16. Number of moles of methane = mass/

molar mass.   No of moles = 6.4/16 = 0.4.  So the number of mole of water = 2* 0.4 = 0.8. We already calculate its molar mass earlier.  So mass of water = molar mass * number of moles = 18 * 0.8 = 14.4

Answer:

D

Explanation:

Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.

According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.

In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.

Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.

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Answer:

No

Explanation:

loss of electron doesn't affect the element.

only change in proton number can, as we notice in nuclear chemistry.

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The substance has the molecular formula  \(C_8H_8S_2\).

The simplest whole-number ratio of the atoms that make up a chemical is its empirical formula. It does not specify how many atoms are contained in a single chemical molecule.

The number of atoms of each element really present in one compound's molecule is indicated by the compound's molecular formula.

A compound's empirical formula and molar mass can be used to derive its molecular formula.

Molar mass = (empirical formula mass) x (n)

Where n = the number of molecules that make up the molecular formula.

In this case, the molar mass is 168g/mol and the empirical formula is \(C_4H_4S.\)

The empirical formula mass can be calculated by adding the atomic masses of the elements:

C = 12.01 g/mol

H = 1.008 g/mol

S = 32.06 g/mol

Empirical formula mass = (12.01 x 4) + (1.008 x 4) + (32.06) = 83.12 g/mol

We can now determine the value of n:

168 g/mol = (83.12 g/mol) x (n)

Therefore, n = 2

The molecular formula of the compound is \(C_8H_8S_2\).

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Millerite has a relatively simple structure compared to other the nickel sulfide family, making it a good example for crystal lattice drawing.

Millerite is a mineral with a hexagonal crystal structure that belongs to the nickel sulfide family. The crystal lattice structure can be drawn by following these steps:Step 1: Draw a six-sided figure to represent the hexagonal crystal structure.Step 2: Draw parallel horizontal lines inside the six-sided figure, with the distance between them equal to the c-axis spacing.Step 3: Draw vertical lines that cross the horizontal lines at a 60-degree angle, forming a hexagonal lattice.Step 4: On each horizontal line, draw circles that represent the nickel sulfide ions, with the distance between them equal to the a-axis spacing.Step 5: Draw circles on the vertical lines that represent sulfur ions, with the distance between them equal to the c-axis spacing.Step 6: Connect the circles with lines to complete the crystal lattice structure of millerite.Some additional points that could be kept in mind are- The hexagonal prism is defined by the crystal lattice constants "a" and "c," which are the distances between the nickel sulfide ions in the hexagonal lattice.- The sulfur ions fill the interstitial sites between the nickel sulfide ions in the lattice.

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Given: Volume of solution, V = 10 mLConcentration of solution, C = 0.5 mol/L.

With this, we can convert the volume from mL to L by dividing it by 1000. Therefore,V = 10 mL = 10/1000 L = 0.01L. Now, we can use the formula: n = C x V where,n = number of moles C = concentration of solutionV = volume of solution. Plugging in the values, we get,n = 0.5 mol/L x 0.01 L= 0.005 mol. In chemistry, mole is defined as a unit for measuring amount of substance. The symbol used for mole is 'mol'. This unit helps to express the number of particles in a sample of substance. For instance, one mole of a substance contains 6.022 x 10²³ particles of that substance.A solution is a homogeneous mixture of two or more substances. The concentration of a solution refers to the amount of solute present per unit volume of the solution. It is usually expressed in moles per litre (mol/L) or molarity.

Molarity is defined as the number of moles of solute present in one litre of solution. It is given by the formula:M = n/Vwhere,M = molarity of the solutionn = number of moles of solute presentV = volume of the solution in litresIn the given question, we are given the volume of solution and its concentration. Therefore, we can use the formula:M = n/Vto find the number of moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L. There are 0.005 moles of HCl present in 10 mL of a solution with a concentration of 0.5 mol/L.

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Physics is the branch of physical science that best addresses the question of how the candle's light moves through space.

The best approach to check for CO2 is to blow the gas through "lime water," a diluted calcium hydroxide solution. Chalk or limestone is the solid calcium carbonate precipitate that is created when carbon dioxide is bubbled through the solution.

Students ignite a small splint, such as a wooden coffee stirrer, extinguish the flame but retain the embers, and then submerge the flaming splint in an unidentified gas. Carbon dioxide causes the splint to entirely disappear.

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Answer:

platinum

Explanation:

the film on a hard drive platter contains platinum

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

if a non-metal takes two valence electrons then it get negatively charged to form ion.

Answer:

The nonmetal will gain a negative charge of magnitude 2

Explanation:

X be the nonmetal

On gaining two electrons

X^2-

For the encapsulation of pharmaceutical drugs or pesticides, the use of starch-borate and starch-glycerol polymers is a promising strategy that can increase their efficacy while also lowering their environmental impact.

\Starch-borate and starch-glycerol polymers are biodegradable and environmentally friendly materials that have been used for encapsulation of pharmaceutical drugs or pesticides. When drugs or pesticides are encapsulated within these polymers, it can help to improve their solubility, stability, and bioavailability, which are critical factors in their effectiveness.

The starch-borate and starch-glycerol polymers are able to form a protective coating around the drug or pesticide molecules, shielding them from external factors that may degrade or reduce their effectiveness, such as moisture, oxygen, and light. This can help to prolong their shelf-life and ensure that they remain effective for longer periods of time.

In addition, these polymers are biodegradable, meaning they can be broken down naturally in the environment without causing harm. This is beneficial as it reduces the environmental impact of these materials, compared to traditional polymers that can persist in the environment for hundreds of years. Overall, the use of starch-borate and starch-glycerol polymers for encapsulation of pharmaceutical drugs or pesticides is a promising approach that can improve their effectiveness while also reducing their environmental impact.

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