If 50.0 g of H2 and 112.5 g of O, react, how many moles of H2O can be produced in the reaction below? 2 H2(g) + O2(g) 2 H2O(g) ​

The empirical formula of polyethylene can be determined by converting the given percentages of carbon (C) and hydrogen (H) into grams. To find the grams of each element, we assume a 100.0 g sample of polyethylene.

For carbon:

Mass of carbon = 86.0% × 100.0 g = 86.0 g

For hydrogen:

Mass of hydrogen = 14.0% × 100.0 g = 14.0 g

Therefore, in a 100.0 g sample of polyethylene, there are 86.0 grams of carbon and 14.0 grams of hydrogen.

The empirical formula of a compound represents the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula, we need to find the ratio of carbon to hydrogen in terms of moles.

First, we convert the masses of carbon and hydrogen into moles using their respective molar masses. The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of hydrogen is approximately 1.008 g/mol.

Number of moles of carbon = 86.0 g / 12.01 g/mol ≈ 7.162 mol

Number of moles of hydrogen = 14.0 g / 1.008 g/mol ≈ 13.89 mol

Next, we divide the number of moles of each element by the smallest number of moles to get a simplified ratio.

Carbon: Hydrogen ≈ 7.162 mol : 13.89 mol ≈ 1 : 1.939

Since we want to express the ratio in whole numbers, we multiply both sides by 2 to get a whole number ratio.

Carbon: Hydrogen ≈ 2 : 3.878

Rounding to the nearest whole number, we find that the empirical formula of polyethylene is CH₂.

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Primary -- covalent/peptide bonds, Secondary --- Hydrogen bonds, Tertiary -- Hydrophobic effect, Quaternary -- Disulfide bonds.

A covalent bond is created among two or more atoms by the mutual sharing with one or more electron pairs. The 2 different atomic nuclei lure these charged particles at the same time. When the thing that is different in electronegativity values of two or more atoms is too slight for transfer of electrons to form ions, a polar covalent forms. A hydrogen bond (or H-bond) in science is a mainly electrostatic attraction between a hydrogen (H) atom tightly attached to an more electronegative "donor" atom or group (Dn) and then another electronegative atom carrying a solitary pair of electrons—the hydrogen bond acceptor (Ac). The hydrophobic effect relates to non-polar molecules and single - molecule sections in a water - soluble solution's tendency to avoid making interaction with molecules of water.

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Answer:

Acceleration is a derived quantity because it depends on fundamental quantities.

The concentration of CO2 in club soda is approximately 1.1964 g/L.

To find the concentration of CO2 in club soda, we need to use the stoichiometry of the reaction and the volume and concentration of the NaOH solution used.

The balanced equation for the reaction is:

CO2(aq) + 2NaOH(aq) → Na2CO3(aq)

From the stoichiometry of the equation, we can see that 1 mole of CO2 reacts with 2 moles of NaOH. Therefore, the moles of CO2 can be calculated using the volume and concentration of NaOH solution used.

Given that 32.14 mL of 0.04202 M NaOH solution was used, we can calculate the moles of NaOH:

moles of NaOH = volume (L) × concentration (M)

moles of NaOH = 32.14 mL × 0.04202 mol/L

moles of NaOH = 0.001351 mol

According to the stoichiometry of the equation, 1 mole of CO2 reacts with 2 moles of NaOH. Therefore, the moles of CO2 can be calculated as:

moles of CO2 = (moles of NaOH) / 2

moles of CO2 = 0.001351 mol / 2

moles of CO2 = 0.0006755 mol

Now, we need to convert the moles of CO2 to grams. The molar mass of CO2 is approximately 44.01 g/mol.

mass of CO2 = moles of CO2 × molar mass of CO2

mass of CO2 = 0.0006755 mol × 44.01 g/mol

mass of CO2 = 0.02979 g

Finally, we need to express the concentration of CO2 in club soda in g/L. We are given that the sample of club soda used is 25.00 mL.

concentration of CO2 = (mass of CO2) / (volume of club soda in L)

concentration of CO2 = 0.02979 g / (25.00 mL × 0.001 L/mL)

concentration of CO2 = 1.1964 g/L

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Answer:

1.75 moles

Explanation:

According to CaC₂(s) + 2 H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)

2 moles of H20 will produce 1 mole of Ca(OH)2

therefore 3.5 moles of H2O will produce 3.5 x (1/2) = 1.75 moles of Ca(OH)2

Taking into account the reaction stoichiometry, a mass of 2.75×10⁻³ grams of carbon dioxide is produced from the complete combustion of 1×10⁻³ grams of methane.

In first place, the balanced reaction is:

CH₄ + 2 O₂  → CO₂ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 16 grams of CH₄ form 44 grams of CO₂, 1×10⁻³ grams of CH₄ form how much mass of CO₂?

mass of CO₂= (1×10⁻³ grams of CH₄× 44 grams of CO₂)÷ 16 grams of CH₄

mass of CO₂= 2.75×10⁻³ grams

Finally, a mass of 2.75×10⁻³ grams of carbon dioxide is produced.

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Answer:

Explanation:

The number of atoms that remains after 3 half-lives given that it was originally 300000 atoms is 37500 atoms

Data obtained from the question

Original amount (N₀) = 300000 atoms

Number of half-lives (n) = 3

Amount remaining (N) =?

How to determine the amount remaining

The amount remaining after 3 half-lives can be obtained as illustrated below:

N = N₀ / 2ⁿ

N = 300000 / 2³

N = 300000 / 8

N = 37500 atoms

Antonio dissolved salt and sugar in a large beaker with distilled water to form a solution. Solutions can have many solutes, but only one solvent. In this mixture, salt and sugar are solutes, and water is the solvent.

A solution is a homogenous mixture, that is, it has 2 or more components.

The component in the greatest proportion is known as the solvent, while the other/s are known as the solutes.

Antonio dissolves salt and sugar in a large beaker with distilled water.

Has Antonio created a solution or a mixture?

Antonio dissolved salt and sugar in a large beaker with distilled water to form a solution. Solutions can have many solutes, but only one solvent. In this mixture, salt and sugar are solutes, and water is the solvent.

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Answer:

b

Explanation:

Explanation:

Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms. Similarly, 11460 years after an organism dies, only one quarter of its original carbon-14 atoms are still around.

Answer:

C3H8 + 5O2 = 3Co2 + 4 H2o

Explanation:

we can balance this equation by algebric method ( ABC method)

Answer:

the invention of the microscope has made seeing bacteria/cells, examining forensic evidence (such as fingerprints), studying atomic structure, tissue analysis, and the study of our ecosystem possible to the naked eye

Explanation:

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1. The volume occupied by 8.8 g of H₂O vapor is 11.0 L

2. The mass of the oxygen (O₂) in the cylinder is 9.28 grams

1. How to determine the volume

The volume occuppied by the water, H₂O vapour can be obtained as follow:

1 mole of H₂O = 22.4 L

Therefore,

0.49 mole of H₂O = (0.49 mole × 22.4 L) / 1 mole

0.49 mole of H₂O = 11.0 L

Thus, the volume of H₂O is 11.0 L

2. How to determine the mass

We know that:

22.4 L = 1 mole of O₂

Therefore,

6.5 L = (6.5 L × 1 mole) / 22.4 L

6.5 L = 0.29 mole of O₂

Thus, we can obtain the mass as follow:

Mass = mole × molar mass

Mass of O₂ = 0.29 × 32

Mass of O₂ = 9.28 grams

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Answer

The coefficient of Mn2O3 after balancing = 2

Explanation

Given: Mn2O3 ----> Mn + O2

Required: Balance the equation

Left side Right side

Mn = 2 Mn = 1

O = 3 O = 2

Multiply Mn by 4 on the right side, then put 2 infront of Mn on the left side. Now you have 6 oxygens on the left, therefore multiply O by 3 on the right.

Left side Right side

Mn = 2 x 2 = 4 Mn = 1 x 4 = 4

O = 3 x 2 = 6 O = 2 x 3 = 6

Therefore the balanced equation is:

Meeting cycle due dates is not one of the three types of liquidity in terms of meeting cash needs in production cycles

The process of turning raw resources into completed goods is referred to as the manufacturing cycle. The cycle consists of numerous independent parts, including product design, scheduling of production, manufacturing tasks, & a cost accounting feedback process. The production cycle of a business reveals how well it can turn assets into earnings, inventories into goods, & supply - chain into cash flow.

The product design, planning and scheduling, production operations, and cost accounting are the four fundamental steps in the production cycle.

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Answer:

Increasing its mass to twice its original value

Explanation:

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Matter and Change

Extensive and Intensive Properties

-----

An Intensive property depends only on the type of matter in a sample and not on the amount.

An Extensive property depends on the amount of matter in a sample

----

Please, look at the next drawing:

Answer: MCCCMC

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Answer:

OOO

Explanation:

OOOOOO

Answer: 25

Explanation:

The new volume will be 18 L

The volume of a dry gas of a given mass was inversely proportional to its pressure at constant temperature, according to Boyle's law. At moderate pressures and temperatures, most gases behave like ideal gases.

Calculation of new volume is shown as below:

The new volume of can be calculated by using Boyle's law.

\(P_{1} V_{1} = P_{2} V_{2}\)

It is given that, \(P_{1}\) = 0.9 atm. \(V_{1}\) = 4 L, \(P_{2}\) = 0.20 atm

Now, put the values of given data in above equation.

\(V_{2}\) = \(P_{1}V_{1}\) / \(P_{2}\).

\(V_{2}\) = (0.9) ×4 / 0.20

= 3.6 / 0.20

= 18 L

therefore, the new volume will be 18 L.

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Answer:

the answer to this question is A H202

a)The total mass of the solution is 158.67 g

b)Owing to the fact that the temperature rose thus it dissolved exothermically.

Let us recall that an endothermic reaction is one in which heat is absorbed while the exothermic reaction is one in which heat is evolved.

Number of moles of the substance =  8.67 g/116.82 g/mol = 0.074 moles

Temperature change inside the calorimeter =  28.54 °C - 23.72 °C = 4.82°C

Let us recall that the total mass in the calorimeter is the mass the solute and that of the solvent. Hence the total mass can be given as; 8.67 g + 150.00 g = 158.67 g

The dissolution process is exothermic.

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The amino acid phenylalanine can be made in the laboratory. Ore NH3 reagents needed to make this molecule.

Phenylalanine is a crucial amino acid with the chemical formula C 9H 11NO 2. Its symbol is Phe or F.  Reagents like benzyl group in place of the methyl group in alanine or as a phenyl group in place of the terminal hydrogen. This significant amino acid is classified as neutral and nonpolar due to the inert and hydrophobic nature of the benzyl side chain. The L-isomer is used in the biochemical synthesis of DNA-coded proteins. Precursors of phenylalanine include tyrosine, the monoamine neurotransmitters dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline), as well as the skin pigment melanin. It is encoded by the codons UUU and UUC. Phenylalanine is a substance found in animal milk. It is used to make food and drink products and is marketed as a dietary supplement due to its analgesic and depressive qualities. It is a direct precursor to the neuromodulator dietary supplement phenethylamine. Because neither humans nor other animals can synthesize phenylalanine, it must be ingested or found in proteins, making it an essential amino acid.

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The stage that this most accurately describes while using the PCR is the initiation of DNA synthesis, also known as the denaturation stage.

In the denaturation stage of Polymerase Chain Reaction (PCR), the double-stranded DNA template is heated to a high temperature to separate the two complementary strands and create single-stranded DNA. The denaturation stage is the first step in the PCR cycle.

In this stage, the heat-stable DNA polymerase denatures the DNA and the primers anneal to the complementary single-stranded template. This marks the beginning of the extension stage, where the DNA polymerase synthesizes new complementary strands along the template DNA.

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Diffrences in water temperature in the ocean create movement because bodies of water at different temperatures have different densities.

Water that is colder is generally denser than water that is warmer, so when a body of water with colder, denser water is next to a body of water with warmer, less dense water, a density gradient is established. This gradient creates a difference in pressure between the two bodies of water, with the colder, denser water being at a higher pressure than the warmer, less dense water.

This difference in pressure creates a force that drives the movement of water from the denser, colder region to the less dense, warmer region. This movement of water is known as convection, and it can occur both vertically and horizontally in the ocean. Vertical convection occurs when differences in temperature cause water to rise or sink, while horizontal convection occurs when water moves laterally due to differences in temperature.

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missing options:

1. as water heats up, the atoms of water more faster.

2. warm water is pulled more by gravity than cold water.

3. warm and cold water mix and reach the same temperature.

4. bodies of water at different temperatures have different densities.

The substance begins to boil at 2750⁰C, the substance begins to melt at 1500⁰C, the temperature at which the substance is both a liquid and a gas at 2750⁰C, temperature is the substance both a solid and a liquid​ at 1500⁰C.

Heating curves are the graphical correlations between heat added to a substance. When viewed from a cooling perspective, ie. loss of heat, it is the cooling curve.

The gradient of the cooling curve is related to the heat capacity, the thermal conductivity of the substance, and the external temperature. The more heat is required to change the temperature of the substance, the slower it cools, so the smaller the gradient of the curve. The higher the thermal conductivity, the faster heat is transferred, so the faster the substance cools.

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