calculate the percent composition of glucose when a 12.5 g sample of glucose was found to be composed of 6.66 g oxygen, 5.00 g carbon, and 0.84 g hydrogen

Answer:

b

Explanation:

cause if so it like more stable when the molten part thing happened

Answer:  296 grams/cm^3 (3 sig figs)

Explanation:  Divide the mass by the volume to get grams/cm^3.

Answer:

You can't convert km to seconds because they are different units.

The weight of silver sulfide that can be made from 1.23 mg of hydrogen sulfide (H2S) obtained from a rotten egg is 8.94mg.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions.

According to this question, silver reacts with hydrogen sulphide and oxygen to form silver sulphide and water as follows:

4Ag(s) + 2H₂S(g) + O₂(g) → 2Ag₂S(s) + 2H₂O(l)

Based on the above equation, 2 moles of hydrogen sulphide forms 2 moles of silver sulphide.

moles of hydrogen sulphide = 0.00123 gram ÷ 34.1 g/mol

moles = 3.607 × 10-⁵moles of H₂S, which is equivalent to 3.607 × 10-⁵moles of Ag₂S.

mass of Ag₂S = 247.8 g/mol × 3.607 × 10-⁵moles = 0.008938grams

Mass of silver sulphide = 8.94mg

Therefore, 8.94milligrams is the weight of silver sulphide.

Learn more about mass at: https://brainly.com/question/20488161

#SPJ1

Answer:

it is just because of the weather because that's how it usually is in Arizona

Explanation:

Answer:

climate

Explanation:

Answer:

d

Explanation:

because the chemicals or substances mix together so it's basically like chemical bonding.

Answer:

b chemical - thermal and mechanical

Explanation:

energy stored in food in is chemical, so it would only make sense of b) was the answer

Answer:

Mass and charge is conserved

Explanation:

According to the law of conservation of mass, matter is neither created or destroyed. With the exception of nuclear reactions where mass is converted to energy thereby leading to an apparent loss in mass, this law applies to chemical reactions.

A redox reaction is a type of chemical reaction which involves a transfer of electrons. In a redox reaction, the mass of reactant particles is conserved. Also, as electrons are transferred between atoms, one donates and the other accepts. The charge of atoms depends on this gain or loss of electrons. A gain of electrons reduced the charge of an atom whereas a loss of electrons increases the charge. This two processes occur concurrently, therefore, charge is also conserved.

the change in entropy:

ΔS = (39.9 kJ/mol) / (0.283 mol * 355.45 K) ≈ 0.375 J/K

What is Entropy?

Entropy means that system naturally progress from order to disorder. Entropy measures the level of this disorder or messiness. We can measure increase or decrease of entropy, for example by answering the question 'How a human being can avoid decay?' or by being concentrated on WHY the system is more organized and why it tends to grow.

To calculate the change in entropy that occurs when 17.0 g of isopropyl alcohol condenses from a gas to a liquid at the normal boiling point (82.30°C) with a molar enthalpy of vaporization (ΔHvap) of 39.9 kJ/mol, we need to use the formula:

ΔS = ΔHvap / T

where ΔS is the change in entropy, ΔHvap is the molar enthalpy of vaporization, and T is the temperature in Kelvin.

First, we need to convert the given temperature from Celsius to Kelvin:

T = 82.30°C + 273.15 = 355.45 K

Next, we need to calculate the number of moles of isopropyl alcohol:

moles = mass / molar mass

The molar mass of isopropyl alcohol (C3H8O) can be calculated as follows:

molar mass = (312.01 g/mol) + (81.01 g/mol) + (1*16.00 g/mol) = 60.10 g/mol

moles = 17.0 g / 60.10 g/mol ≈ 0.283 mol

Now, we can calculate the change in entropy:

ΔS = (39.9 kJ/mol) / (0.283 mol * 355.45 K) ≈ 0.375 J/K

Therefore, the change in entropy that occurs when 17.0 g of isopropyl alcohol condenses from a gas to a liquid at the normal boiling point is approximately 0.375 J/K (joules per Kelvin).

To learn more about Entropy from the given link

https://brainly.com/question/104730

#SPJ4

Boyle's Law states that as the volume of a gas decreases, the pressure of the gas increases. This is because the gas particles are confined to a smaller space, and therefore strike the walls of the container with more force.

The kinetic energy of the gas particles does not necessarily increase, but rather stays constant as long as the temperature remains constant. The temperature of the gas does not increase, but rather decreases if the volume decreases while the pressure increases. The gas particles do strike the walls of the container more often as the volume decreases. However, the size of the gas particles does not change as the volume decreases, so this is not a factor in Boyle's Law.
                                          According to Boyle's Law, the pressure of a gas increases as the volume decreases because the gas particles strike the walls of the container more often. This law states that for a given quantity of gas at a constant temperature, the pressure and volume of the gas are inversely proportional. As the volume of the container decreases, the gas particles have less space to move, resulting in more frequent collisions with the container walls, thus increasing the pressure.

Learn more about Boyle's Law

brainly.in/question/54148312

#SPJ11

Answer:

here u go! ................

Answer:

Hope this is ok :))

Explanation:

When ions are tightly attached to solvent molecules they are called as solvated ions.

When separation occurs, the solute is divided into ions or molecules, and every ion or molecule is surrounded by a solvent. The bonding between the solute particles and solvent molecules is called solvation. A solvated ion or molecule is surrounded by solvent molecules. For example, when we add NaCl to water, the NaCl molecules split into Na⁺ and Cl⁻ ions. These ions of sodium and chlorine then get surrounded by water molecules. We can call the ion water mixture a solution and the surrounded ions of sodium and chlorine as solvated ions.

To learn more about solvent molecules:

https://brainly.com/question/13836544
#SPJ4

To prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.The ratio of benzoic acid to sodium benzoate in the buffer solution using the Henderson-Hasselbalch equation.

To prepare a pH 4.00 buffer solution using benzoic acid and sodium benzoate, we need to calculate the appropriate volumes of the 0.100 M benzoic acid and 0.240 M sodium benzoate solutions.

First, we need to determine the ratio of benzoic acid to sodium benzoate in the buffer solution. The Henderson-Hasselbalch equation can help us with this calculation:

pH = pKa + log([A-]/[HA])

Given that the pH is 4.00 and pKa is 4.20, we can rearrange the equation:

log([A-]/[HA]) = pH - pKa

log([A-]/[HA]) = 4.00 - 4.20

log([A-]/[HA]) = -0.20

Next, we take the antilog of -0.20 to find the ratio of [A-] to [HA]:

[A-]/[HA] = antilog(-0.20)

[A-]/[HA] = 0.63

The ratio of [A-] to [HA] is 0.63.

Now, let's calculate the volumes of each solution needed. Let's assume x represents the volume (in mL) of the 0.100 M benzoic acid solution and y represents the volume (in mL) of the 0.240 M sodium benzoate solution.

Since the total volume is 100.0 mL, we have the equation: x + y = 100

Considering the ratio of [A-] to [HA] as 0.63, we can write the equation: y/x = 0.63

Solving these two equations simultaneously will give us the volumes of each solution:

x + y = 100

y/x = 0.63

By substituting y = 0.63x from the second equation into the first equation, we get:

x + 0.63x = 100

1.63x = 100

x = 61.35 mL (rounded to two decimal places)

Substituting this value back into the equation x + y = 100, we find:

61.35 + y = 100

y = 38.65 mL (rounded to two decimal places)

Therefore, to prepare the pH 4.00 buffer solution, you should mix approximately 61.35 mL of the 0.100 M benzoic acid solution with 38.65 mL of the 0.240 M sodium benzoate solution.

To know more about the Henderson-Hasselbalch equation, click here, https://brainly.com/question/31732200

#SPJ11

Answer:

just watch the video, what does it start with, write that down for each trial, then what does it end with, then starting mass - ending mass is the change mass

Answer:

A. The green light is absorbed

Answer:

Compare the properties of metals, nonmetals, and metalloids. Metals are shiny, are good conductors of heat and electric current, and are malleable and ductile. Nonmetals are dull, are poor conductors of heat and electric current, and tend to be brittle. basically, It's A.

Explanation: if it's not "A" then you can blame me cuz i, myself, am gonna be honest, don't know the answer, but what i read, shows me, that it's A.

Answer:

A because density DOES have a unit

Explanation:

Answer:

A phosphorus atom forms a P3- ion by gaining three electrons.

here

For the fraction injected in the video to demonstrate the use of the GC, the hexane had a shorter retention time compared with the toluene peak.

The fraction used to demonstrate the use of the GC gave two peaks with short retention time and one peak with longer retention time. The smallest of the short retention time peaks was the peak of hydrogen (H₂).

For Fraction 1 (the fraction that distilled first), we expect the toluene peak to be the one with the largest area.

For fraction 3, we expect that the hexane peak would be the one with the largest area.

The component with a larger boiling point will have a longer retention time.

Fraction 2 (if it was injected) will show that the peak of hexane would have a larger area than the peak of toluene.

To assign peaks in a GC, one of the factors to consider is the volatility (V) of the components. The higher the boiling point, the slower it will elute and the longer the retention time.

In a distillation, the more volatile compound will distill first. As the temperature rises, the less volatile compound will then distill.

The GC video showed that hexane had a shorter retention time compared to the toluene peak. Retention time is the time taken for a component to elute from the GC column and reach the detector. Compounds with shorter retention times elute faster and are detected earlier.

The fraction demonstrated in the GC had two peaks with short retention times and one peak with a longer retention time. The smallest of the short retention time peaks was the peak of hydrogen (H₂). Peaks on a GC chromatogram correspond to different compounds or components in the sample.

For Fraction 1 (the fraction that distilled first), the toluene peak is expected to have the largest area since it is the major component in the mixture and is expected to elute first.

For fraction 3, the hexane peak is expected to have the largest area since it is the major component in the fraction and is expected to elute first.

The component with a larger boiling point will have a longer retention time. Boiling point is the temperature at which a liquid turns into a gas. Compounds with higher boiling points will require more energy to turn into gas and will, therefore, take longer to elute from the GC column.

Fraction 2 (if injected) would show that the peak of hexane would have a larger area than the peak of toluene since hexane is the major component in the fraction and is expected to elute first.

To assign peaks in a GC, one of the factors to consider is the volatility (V) of the components. Volatility is the tendency of a compound to evaporate. Compounds with higher boiling points are less volatile and will take longer to elute from the GC column, resulting in longer retention times.

In a distillation, the more volatile compound will distill first. As the temperature of the mixture is raised, the boiling point of the components increases. The less volatile compound will then distill as the temperature continues to rise.

For more questions like Temperature click the link below:

https://brainly.com/question/11464844

#SPJ11

Answer:

False

Explanation:

Ionic bonds are actually strong, but unfortunately can be broken easily

1s22s22p63s23p4 What would the entire electron configuration of the ar2 ion be if ar lost 2 electrons?

A noble gas element is argon. As a result of having a fully charged outer shell, argon is extremely stable. The outer shell of argon would be incomplete if it were to give or receive one electron. Argon is already stable, therefore it neither gains nor loses electrons.

Argonium. A proton and an argon atom are combined to form the ion argonium (ArH+). The amount of molecular hydrogen H2 is between 0.0001 and 0.001 percent in diffuse atomic hydrogen gas in interstellar space, where it can be discovered.

Learn more about electron configuration here:

https://brainly.com/question/14283892

#SPJ4

Answer:

A precipate is formed as a result of double displacement reaction.

Explanation:

When two subsatances in solution react they yield a solid and an aqueos compound.

Answer:

Chloroplast

Explanation:

Answer:

1. Mendeleev left gaps in his periodic table because the properties of known elements predicted other, as-yet-undiscovered, elements in these locations. As Mendeleev organized his periodic table, he recognized that these gaps would be filled as future scientists identified new elements.

2. Metalloids lie on either side of the dividing line between metals and nonmetals. This can be found, in varying configurations, on some periodic tables. Elements to the lower left of the line generally display increasing metallic behavior; elements to the upper right display increasing nonmetallic behavior.

3. The general trend is for ionization energy to increase moving from left to right across an element period. Moving left to right across a period, atomic radius decreases, so electrons are more attracted to the (closer) nucleus. The general trend is for ionization energy to decrease moving from top to bottom down a periodic table group.

4. Alkali metals have a corresponding [Noble gas] ns 1 electronic configuration. They occupy the first column of the periodic table. Alkali elements are Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Ru), Cesium (Cs) and Francium (Fr) occupying successive periods from first to seven.

hope this helps

YO WSGGGGGGGGGG Answer:

FIRST ANSWER

Mendeleev left gaps in his periodic table because he knew that these elements existed, but had not yet been discovered. He believed that the elements would be eventually found and would fit perfectly into the gaps. Two such elements are Germanium and Gallium. 2.

SECOND ANSWER

What types of properties do metalloids display, and where are they found on the periodic table? Metalloids can be shiny or dull and can conduct heat and electricity better than nonmetals but not as well as metals. They are ductile and malleable. To the right of the stairstep, elements gain electrons when bonding.

THIRD ANSWER

As you go across a period from left to right, electronegativity increases, ionization energy increases, and atomic radius decreases. In order for energy to increase, radius must decrease. As you go up and down a period, electronegativity decreases, ionization energy decreases, and atomic radius increases.'

LAST ANSWER

Outer electron configuration for alkali metals

All of the alkali metals have a single s electron in their outermost principal energy. Recall that such electrons are called valence electrons. The general form for the electron configuration of each alkali metal is ns1, where the n refers to the highest occupied principal energy level.

Have a good school year, day, month, years and years to come cya dude

Answer:

1. chemical 2. potential

Explanation:

energy, potential energy, is stored in the covalent bonds holding atoms together in the form of molecules. This is often called chemical energy.Energy is found in different forms, but all energy falls into the following two categories – potential energy and kinetic energy. Potential energy is stored energy, or the energy of position. It consists of the following forms: Chemical energy is energy stored in the bonds between atoms in molecules.

The form of energy stored in the bonds between atoms is chemical energy. This form of energy falls into the potential energy category.

The term chemical energy is defined as the energy of chemical substances that is released when they are undergo the process of  chemical reaction and covert into the another substances.

The chemical energy is used to create heat and electricity along the world. Some peoples also burn these fuels on more minor scales to formed heat to keep buildings warm. They burn fossil fuels like natural gas, oil, and petroleum to produce steam to turn turbines that formed heat and electricity.

The energy stored in chemical bonds is called as chemical energy therefore, it is a form of potential energy. The examples of potential energy are the energy of water present behind a dam.

Thus, The form of energy stored in the bonds between atoms is chemical energy. This form of energy falls into the potential energy category.

To learn more about chemical energy, follow the link;

https://brainly.com/question/1371184

#SPJ2

Answer:

gas

Explanation:

gas cant be aditanified as a gas if this is not right i am so sorry.

Answer:

ném NaOH vào thì th AlCl3 tan hết còn lại kết tủa Fe(OH)3 lần.

Lọc kết tủa riêng phần dung dịch tan riêng

Rồi Cho HCl vô lại là xong

Explanation:

mix the food with digestive juices that have acids and enzymes, breaking it into much smaller, digestible pieces

When a liquid is heated, its particles gain energy and travel quicker; when it is chilled, the particles slow down and become closer together.

A particle (or corpuscule in older literature) is a tiny localized entity in the physical sciences that can be characterized by several physical or chemical characteristics such as volume, density, or mass.

They range in size and number from subatomic particles such as electrons to minuscule particles such as atoms and molecules to large particles such as powders and other granular materials. Particles can also be used to construct scientific models of bigger objects, such as people moving in a throng or celestial entities in motion, based on their density.

Learn more about   particle

https://brainly.com/question/2288334

#SPJ1

The amount, in grams, of sucrose that will be contained in a 500 mL sample of the solution would be 30.6 grams..

The sucrose solution contains 0.34 moles of sucrose per liter of the solution. We want to determine the grams of sucrose that would be in a 500 mL sample of the solution.

Recall that: molarity = mole/volume. Note that the volume has to be in liters.

500 mL solution = 500/1000

                           = 0.5 liters

Molarity of the solution = 0.34 moles/liter.

Since: molarity = mole/volume

           mole = molarity x volume

                     = 0.34 x 0.5

                      = 0.17 moles

Also, recall: mole = mass/molar mass, thus: mass = mole x molar mass.

The molas mass of glucose is 180 g/mol.

Thus, the mass of 0.17 mol glucose = 0.17 x 180

                                                     = 30.6 grams

In other words, the mass of sucrose in a 500 mL sample of the solution would be 30.6 grams.

More on stoichiometric problems can be found here: https://brainly.com/question/29856106

#SPJ1