(a) How many minutes does it take to form 10.0 L of O₂ measured at 99.8 kPa and 28°C from water if a current of 1.3 A passes through the electrolytic cell?

Answer:

Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point.

Through a procedure known as polymerization, monomers are joined to produce polymers.

the process of polymerization involves the joining of monomers, or small organic molecules, to create polymers, which are larger molecules that resemble long chains. Condensation and addition polymerization are the two primary forms of polymerization.

The method of addition polymerization involves joining together monomers with double or triple bonds to create polymers without losing any atoms. Plastics such as polyethylene and polypropylene are produced using this method of polymerization.

In the process of condensation polymerization, functional monomers like amines and carboxylic acids are linked together to form polymers by removing a tiny molecule like water. Polyamides, polyesters, and polyurethanes are produced using this form of polymerization.

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Answer:

Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel.

There must be Fuel to burn.

There must be Air to supply oxygen.

There must be Heat (ignition temperature) to start and continue the combustion process.

Answer:

Farther; longer.

Explanation:

In the early nineties When the research on solar system first started it was found out that the solar system has 9 planets which are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Pluto which is considered as the number 9 of the planets in the solar system has been removed in the year 2006 and labelled as a "dwarf planet'' hence, Neptune is considered as the farthest planet from the Sun.

The farther the planets are from the sun, the longer it will take them to orbit round the sun. For instance, it only takes around 87.97 days for mercury(first planet nearer to the sun) to orbit round the sun, while it takes the earth (third planet nearer to the sun) 365 1/4 days to orbit round the sun.

          Since water served as the foundation for creating the metric system of measurement, density is defined as mass divided by volume (=m/v), meaning that one cubic centimeter (1cm3) of water weighs one gram (1g).

        The density of water is typically expressed in terms of grams per milliliter (1 g/ml) or grams per cubic centimeter (1 g/cm3).

85-milliliter outcome

2.988 Ounces

0.1868 Pounds

84.719 Grames

0.0847 Kilograms

Weight at 80°F(26.7°c)

         As the temperature drops, the water becomes denser. Water density reaches its maximum at 4 degrees Celsius.

        Like a solid, a liquid's density is determined by dividing its mass by its volume, or D = m/v. Water has an average density of one gram per cubic centimeter. No matter the size of the sample, a substance has a constant density.

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Answer:

Food mass is stored as mass, and then transformed into energy

Explanation:

When we eat food, the mass of food undergoes the digestion process and is being converted to various molecules in the body. For instance carbohydrate foods are broken down into glucose which is now stored in the body as glycogen.

When energy is required in the body, this glycogen is broken down into glucose again and mass is converted to energy required to do work in the body.

The molecular formula of the compound is C1H2.

The molecular formula of a compound can be determined by analyzing its percent composition by mass. The first step is to convert the percent composition by mass to the mass of each element in one mole of the compound.

85.64% C = (85.64 g C/100 g compound) * (1 mole C/12.01 g C) = 7.13 moles C/mole compound

14.36% H = (14.36 g H/100 g compound) * (1 mole H/1.008 g H) = 14.22 moles H/mole compound

The next step is to find the ratio of atoms in the compound by dividing the moles of each element by the smallest moles of any element.

C:H = 7.13 moles C/mole compound : 14.22 moles H/mole compound = 7.13:14.22

To find the molecular formula, we need to divide the moles of each element by the lowest ratio of atoms to obtain the least whole number ratio of atoms in the compound.

C:H = 7.13 moles C/mole compound / 7.13 : 14.22 moles H/mole compound / 7.13 = 1 : 2

Therefore the molecular formula of the compound is C1H2

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Answer:  The color has changed or the formation of light and heat. Also, the temprature will change as well.

Explanation:

Once chewed and swallowed, the food will be digested and absorbed nutrients, while the rest of the food will be excreted through the body's feces. This digestion process can take about 24-72 hours.

The process of digestion of food in humans can be divided into two types, namely mechanical digestion and chemical (enzymatic) digestion. Mechanical digestion is the process of changing food from a large or coarse form to a smaller or finer form. The process takes place in the mouth with the help of teeth and tongue. The mechanical digestion process also occurs in the stomach with the help of peristaltic motion of the stomach wall, so that food is like being stirred. While the chemical digestion process is the process of converting food substances from complex forms into simpler forms with the help of digestive enzymes.

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Answer:

0.756 J

Explanation:

Temperature change (delta T) = 0.855 degrees Celsius

Mass of water (m) = 0.2067 g

Specific heat capacity of water (c) = 4.28 J/g degrees C

Heat added = m * c * delta T

= (0.2067 * 4.28 * 0.855) J

= 0.756 J

If 100 g of calcium carbonate is allowed to decompose, 56 g of calcium oxide is produced. The mass of carbon dioxide is produced by the decomposition will be 44g

According to the given equation

CaCO₃ → CO₂ + CaO

As

mass of CaCO₃ = 100g

mass of CaO = 56g

mass of CO₂= ?

depending on the conservation of mass

mass of the reactant = mass of the product

100 g  =  ( X +  56 )

mass of CO2 =  100 - 56

= 44 g

So the mass of carbon dioxide is produced by the decomposition will be 44g

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To determine the expected cell potential, it is required to use the Nernst equation. The expected cell potential is -1.668V.

Given information,

Concentration of barium ion = 2.50 × 10⁻³M

Concentration of aluminium ion = 4.00 × 10⁻²M

The Nernst equation is given by: Ecell = \(E^0cell - (\frac{RT}{nf} ) \times ln(Q)\)

Where:

Ecell is the cell potential

E°cell is the standard cell potential

R is the gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

n is the number of electrons transferred in the balanced half-reactions

F is Faraday's constant (96,485 C/mol)

Q is the reaction quotient, which is calculated using the concentrations of the reactants and products.

In this case, the half-reactions and their standard reduction potentials (E°) are:

Al³⁺ + 3e⁻ → Al (E° = -1.66 V)

Ba²⁺ + 2e⁻ → Ba (E° = -2.90 V)

The overall balanced equation is: 2Al³⁺ + 3Ba → 3Ba²⁺ + 2Al

The reaction quotient (Q) can be calculated as:

Q = \(\frac{([Ba^{2+}]^3 \times [Al])}{([Ba]^3 \times [Al^{3+}]^2)}\)

Substituting the given concentrations into the equation, we have:

Q = \(\frac{([2.50 \times 10^{-3}]^3 \times [4.00 \times 10^{-2}])}{([3]^3 \times [3.00 \times10^{-3}]^2)}\)

Simplifying this expression gives:

Q = 0.123

Now, substitute the values into the Nernst equation:

\(E_{cell\) = \(E^0cell - (\frac{RT}{nf} ) \times ln(Q)\)

\(E_{cell\) = \((-1.66) - (\frac{8.314 \times 298}{(3 \times 96,485) \times ln0.123})\)

\(E_{cell\) = -1.668V

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Answer:

I think iron sorry if its wrong goodluck!

Answer:

Did you find the answer>

Explanation:

Answer:

The particles have high intermolecular forces, reducing the elasticity of their collisions.

Explanation:

Answer: Silicon tetrahydride (silane) is a covalent compound where a central silicon (Si) atom is covalently bonded to 4 terminal hydrogen (H) atoms.

Explanation:

Answer:Answer

The more active the metal, the more easily it gives up its electron(s). Thus, for number 1, nickel is the only metal of the options that is more active than copper and is the only metal that would give up electrons for copper. For number 2, aluminum is the only metal that is less active than magnesium and is the only metal that would not donate electrons to magnesium.

Explanation:

Iotopes of elements are atoms of the same element which differ in their mass numbers due to differences in neutron number in the nucleus.

Isotopes are atoms of an element which have the same atomic number but different mass numbers.

The difference in mass number is due to difference in number of neutrons in the nucleus of the atom.

The data of the given isotopes of elements are as follows:

\(^{24}Na, Na-24, 11, 24, 11, 12, 11\)

\(^{32}O, O-32, 16, 32, 16, 16, 16\)

\(^{44}Ca, Ca-44, 20, 44, 20, 24, 20\)

\(^{24}Mg, Mg-24, 12, 24, 12, 12, 12\)

\(^{64}Zn, Zn-64, 30, 64, 30, 34, 30\)

\(^{207}Pb, Pb-207, 82, 207, 82, 125, 82\)

\(^{238}U, U-238, 92, 238, 92, 146, 92\)

\(^{129}Te, Te-129, 52, 129, 52, 77, 52\)

\(^{19}F, F-19, 9, 19, 9, 10, 9\)

Therefore, isotopes of elements differ in their mass numbers.

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Answer:

2,4, 7, Ng, N, P 6,9

Explanation:

6.94 is much more closet to 7.016, so Li 7 is more abundant

Based on the given information and the densities provided in the table, the unknown element in the alloy is most likely Beryllium. option(a)

To identify the unknown element in the alloy, we need to compare the density of the alloy with the densities of the elements listed in the table.

The density of the alloy can be calculated using the given information. We know that 10.0 grams of the alloy has a volume of 4.20 cm³. Density is defined as mass divided by volume, so we can calculate the density of the alloy as:

Density = Mass / Volume = 10.0 g / 4.20 cm³ ≈ 2.38 g/cm³

Now, we compare the calculated density of the alloy (2.38 g/cm³) with the densities listed in the table. From the given options, the closest density is that of aluminum, which is 2.70 g/cm³. The alloy's density is lower than the density of aluminum, which means it must contain an element with a lower density than aluminum.

The unknown element in the alloy is most likely Beryllium (option A) with a density of 1.85 g/cm³. The combination of 62% aluminum and 38% beryllium in the alloy would result in a density close to the calculated value of 2.38 g/cm³. option(a)

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Answer:

don't know if this is what your looking for but it might be a NEUTRILIZATION REACTION.

Answer:

i think its sodium donates an electron to chlorine

Explanation:

Answer:

See explanation

Explanation:

Matter may exist in three phases; solid, liquid and gas. The state in which matter exists depends on the extent of intermolecular forces operating in the substance.

In solid particles, the molecules that compose the solid are close together because the molecules of a solid do not move from place to place but they continue to vibrate about their fixed position.

For liquids, the molecules that compose a liquid are in random motion but are less energetic than molecules of a gas.

In gases, the molecules are not held together at all. The molecules of a gas have the highest degree of freedom. They move from one point another at a high velocity.

Hence, the order of increasing degree of movement of the particles in different states of matter = solids<liquids< gases.

Solids have well arranged particles, the molecules of a liquid are a little more disorderly than liquid particles while gas particles are the most disorderly of all the states of matter.

The process of fractionation is based on boiling point of the components of a solution.

What will separate out during the fractional distillation process depends on the boiling point of the substance. When the difference between the boiling points of two or more miscible liquids is less than 25 K, it is used to separate the mixture. The boiling point affects fractional distillation. Since different hydrocarbons have different boiling points, fractional distillation can be used to easily purify them.

Therefore, factional distillation makes use of boiling point. Due to the different boiling points of the various liquids, fractional distillation is effective. Vapors rise through a column that is hot at the bottom and cooler at the top when the mixture is heated.

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Answer:

Hydrogen finds a variety of application due to its dual nature. Following are some important uses of hydrogen:

Hydrogen is used in the synthesis of ammonia and the manufacture of nitrogenous fertilizers.

Hydrogenation of unsaturated vegetable oils for manufacturing vanaspati fat.

It is used in the manufacture of many organic compounds, for example, methanol.

Hydrogen chloride is a very useful chemical and is prepared from hydrogen.

Hydrogen can reduce many metal oxides to metals by metallurgical processes.

Hydrogen is used as rocket fuel in many space research activities.

Hydrogen fuel is being experimented within the automotive industry with hydrogen fuel cells.

Answer:

bleh

Explanation:

Neutralization reaction between magnesium hydroxide and hydrochloric acid Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

so uh pretty sure Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq) b.

correct me if im wrong <3

Answer: The name of the salt produced is Calcium Sulphate.

Explanation:

we know, whenever an acid reacts with a base, we get a salt and water.

In the given question, Calcium Hydroxide is a base and Sulfuric acid is an acid.

When Calcium Hydroxide reacts with Sulfuric Acid, we get Calcium Sulphate and Water.

The required balanced chemical reaction is:-

Ca(OH)2 + H2SO4 = CaSO4 + 2H2O

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The two hot air balloons demonstrate that matter is too small to be seen without magnification because the air, heat, and sunlight, warm, and shine on the balloon are all made up of particles too small to be seen.

Particles are tiny, subatomic pieces of matter that make up atoms. They are the smallest known objects in the universe and are the building blocks of all matter. Particles are divided into two main categories: fermions and bosons. Fermions are particles that make up matter, such as protons and neutrons. Bosons are particles that mediate forces, such as photons, gluons, and the Higgs boson. Particles are described by their mass, spin, and electrical charge, and each type of particle interacts with other types of particles in specific ways. Particles have been studied since the late 19th century and have allowed scientists to gain a better understanding of the nature of matter and the universe. Particles are essential for the study of many fields of science, including astrophysics, cosmology, and particle physics.

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