Convert 1.9 kJ into the following units:
a. calories [answer: 450 cal]
b. Joules [answer: 1,900 J]

please show me the work, thank youu

Answer:

neutral, acidic, basic

Explanation:

Know the acidity rules. Sorry I just saw this!

- Hope that helps! Please let me know if you need further explanation.

To solve this problem, we can use the ideal gas law, which relates pressure, volume, temperature, and the number of moles of gas. At a pressure of 3.36 atm, 175 g of disulfur monoxide gas would occupy a volume of 16,600 ml at 195C.

The ideal gas law is expressed as PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin. First, we need to calculate the number of moles of disulfur monoxide gas present. We can use the formula n = m/M, where m is the mass of the gas and M is its molar mass. The molar mass of disulfur monoxide is 112 g/mol, so the number of moles is:
n = 175 g / 112 g/mol = 1.5625 mol
Next, we need to convert the temperature to Kelvin. 195C + 273.15 = 468.15K. Now we can use the ideal gas law to solve for the pressure. Rearranging the equation, we get:
P = nRT / V
Plugging in the values we calculated, we get:
P = (1.5625 mol) x (0.08206 L.atm/mol.K) x (468.15 K) / (16,600 ml)
P = 3.36 atm

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To properly test for total chlorine in water, it is important to collect the correct amount of water. The recommended amount of water to collect for total chlorine testing is at least 100 mL.

This amount of water ensures that the test results are accurate and representative of the overall chlorine content in the water sample.

It is also important to ensure that the water sample is collected in a clean and sterile container to avoid any contamination that may affect the test results.

It is recommended to collect the water sample from the middle of the water source, and to avoid collecting water that may have been stagnant for an extended period of time.

Proper collection and testing of water for total chlorine is crucial in ensuring the safety and quality of drinking water.

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The volume the gas will occupy when the pressure decreases to 1 kPa is 120 liters.

To answer your question, we can use Boyle's Law, which states that the product of pressure (P) and volume (V) is constant for a given amount of gas at a constant temperature. In this case:

Initial pressure (P1) = 2 kPa
Initial volume (V1) = 60 liters
Final pressure (P2) = 1 kPa
Final volume (V2) = ?

Using Boyle's Law, P1 * V1 = P2 * V2. Plugging in the given values:

(2 kPa) * (60 liters) = (1 kPa) * V2

Solving for V2, we find:

V2 = (2 kPa * 60 liters) / 1 kPa
V2 = 120 liters

So, when the pressure decreases to 1 kPa, the gas will occupy a volume of 120 liters.

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Answer:

10

Explanation:

because 4 for 2 is 8 and the one invisible in p for 2 is 2, adding the 2+ 8 Is 10 are the atoms of Magnesium.

A. The mass of fluorine in the sample is 0.98 g

B. The percentage of fluorine in the sample is 48.8%

The mass of fluorine in the sample can be obtained as follow:

Mass of fluorine = Mass of sample - Mass of calcium

= 2.01 - 1.030

= 0.98 g

The percentage of fluorine in the sample can be obtain as follow:

Percentage of fluorine = (mass of of fluorine / mass of sample) × 100

= (0.98 / 2.01) × 100

= 48.8%

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Complete question:

fluorite, a mineral of calcium, is a compound of the metal with fluorine. analysis shows that a 2.01−g sample of fluorite contains 1.030 g of calcium. calculate the following:

(a) mass of fluorine in the sample

(b) percentage of fluorine in the sample

Answer:

Glucose is the carbohydrate produced by photosynthesis. Energy-rich glucose is delivered through your blood to each of your cells. ATP is the usable form of energy for your cells.

Explanation:

The difference with tonic water and club soda is that tonic water also has minute quantities of quinine. Quinine, a natural substance in cinchona tree bark, is responsible for the tonic's strong bitterness.

Drinking tonic water only has one biggest advantage, which is hydration. This should keep you nourished and improve your ability to concentrate more often than soda or juice because it's still water. It is kind of a this double sword because it has a sugar that is equivalent to those.

The beverages had their start here within 1825 when British Army troops stationed in India started experimenting quinine with sugar, water, and gin to make an inadvertently tasty sundowner that also acted as a malaria preventative.

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Answer:

+ 3

Ex planation:

Al3+ indicates an ion of aluminum having a charge of + 3. I.e., since an aluminum atom normally has 13 protons and 13 electrons, this ion has 10 electrons (-10 charge) and 13 protons (+ 13 charge) giving it a charge of + 3 (-10 + 13 = +3).

hope this helps!

Answer:

There are two different effects. Both a chemical and a physical reasoning are needed to explain what we can see. Both physics and chemistry matter. The initial cancellation effect can confuse the observer. Mathematics plays a role when the chemical equations are balanced. 

Explanation:

hope this helps u:))

Answer:

wow ok ill try to

Explanation:

this is the most beautiful thing ive seen all day

thank you

The paper titled "Large-Area 2D Layered MoTe2 by Physical Vapor Deposition and Solid-Phase Crystallization in a Tellurium-Free Atmosphere" discusses a method for producing large-area, two-dimensional (2D) layered MoTe2 using physical vapor deposition (PVD) and solid-phase crystallization (SPC) in an atmosphere without the use of tellurium.

The researchers aim to overcome the challenges associated with the synthesis of MoTe2, particularly the limited availability and high cost of tellurium, which is commonly used in traditional synthesis methods. They propose a process that involves depositing molybdenum (Mo) and tellurium (Te) precursors onto a substrate using PVD and subsequently subjecting the deposited film to SPC in a tellurium-free atmosphere.

The results demonstrate the successful synthesis of large-area, high-quality 2D layered MoTe2 films without the need for tellurium. The films exhibit desirable structural and electronic properties, making them suitable for various applications in electronic and optoelectronic devices.

This research presents an alternative approach for the scalable synthesis of 2D layered materials and offers potential benefits such as reduced cost, improved sustainability, and broader accessibility to these materials for scientific and technological advancements.

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The molecule described has five bonded atoms and no lone pairs, giving it a total electron domain of five. The ideal bond angle for a molecule with this electron domain is 120 degrees, and the hybridization of the central atom is sp3d. The polarity of the molecule depends on the identity of the bonded atoms and their respective electronegativities.

The molecule with three bonded atoms and two lone pairs, and an electron domain of 5 is trigonal bipyramidal.

The ideal bond angle for a trigonal bipyramidal molecule is 90° between the axial positions and 120° between the equatorial positions.

The hybridization for this molecule is sp3d.

The polarity of the molecule depends on the electronegativity of the atoms and their arrangement in space. If the bonded atoms are identical and the lone pairs are symmetrically arranged, the molecule will be nonpolar.

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Answer:

the answer is (G)

Explanation:

It is G!

Your welcome!

Answer: are transferred

Explanation:

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal.

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.

Answer:

are transferred

Explanation:

i took the test earlier

Answer:

Initially there is 100 g of potassium nitrate in solution, at 50 °C the solubility is 84 g/100g (original data or graph), so 16 g will have crystallised out

Explanation:

The heat of combustion of ethane (C2H6) in kilojoules per mole can be determined by subtracting the sum of the enthalpies of formation of the products from the sum of the enthalpies of formation of the reactants.

The enthalpy of formation is the change in enthalpy when one mole of a compound is formed from its constituent elements in their standard states. By referring to the table of thermodynamic properties, the enthalpies of formation for ethane (C2H6), carbon dioxide (CO2), and water (H2O) can be obtained.

The heat of combustion of ethane can be calculated using the following equation:

ΔHcomb = ΣΔHf(products) - ΣΔHf(reactants)

For the combustion of ethane, the reaction equation is:

C2H6 + 3.5O2 → 2CO2 + 3H2O

Using the enthalpies of formation from the table, the heat of combustion of ethane can be calculated.

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The concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.

To determine if the industry will likely meet the desired effluent quality, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon.

BODL concentration in the aerated lagoon:

The BODL concentration in the lagoon can be calculated using the equation:

BODL_lagoon = BODL_influent - q * Xv * θ

where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), Xv is the concentration of volatile suspended solids (to be determined), and θ is the hydraulic retention time (1 day).

Concentration of volatile suspended solids (Xv) in the lagoon:

The concentration of volatile suspended solids can be calculated using the equation:

Xv = BODL_influent / (q * θ)

where BODL_influent is the initial BODL concentration (2,000 mg/l), q is the specific oxygen utilization rate (27 mgBODL/mgVSSa-d), and θ is the hydraulic retention time (1 day).

By substituting the given values into the equations, we can calculate the BODL concentration in the lagoon and the concentration of volatile suspended solids.

Regarding the aerator capacity needed, the question asks for the amount of aerator capacity in kW/1,000 m3 of tank volume. To calculate this, we need the field oxygen transfer efficiency (1 kgO2/kWh). However, the equation or method to determine the aerator capacity based on the given information is not provided. Without additional information or equations, it is not possible to calculate the specific aerator capacity needed in this scenario.

In summary, we can calculate the BODL concentration in the aerated lagoon and the concentration of volatile suspended solids (Xv) in the lagoon to assess the effluent quality. However, the specific aerator capacity needed cannot be determined without additional information or equations.

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2.0 g \(H_2O\) is required to form 1.3 L of \(O_2\) at a temperature of 305K and a pressure of 0.901 bar.

To solve the problem, we need to use the ideal gas law and stoichiometry of the reaction. Here is the solution:

First, we need to find the number of moles of O2 that will be produced. We can use the ideal gas law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in kelvin. Rearranging the equation to solve for n, we get:

\(n = \frac{PV}{RT}\)

Plugging in the values given in the problem, we get:

\(n = \frac{(0.901)*(1.3)}{(0.08206)*(305)} = 0.0561\) mol \(O_2\)

Next, we use the stoichiometry of the reaction to determine the number of moles of \(H_2O\) that are required. For every 1 mol of \(O_2\) that is produced, we need 2 mol of H2O. Therefore:

moles of \(H_2O\) = (2 × moles of \(O_2\)) = (2 × 0.0561 mol) = 0.1122 mol

Finally, we can convert the number of moles of \(H_2O\) to grams using the molar mass of water:

mass of \(H_2O\) = (moles of \(H_2O\)) × (molar mass of \(H_2O\)) = 0.1122 mol × 18.015 g/mol = 2.02 g

Rounding this to two significant figures, the mass of \(H_2O\) required to form 1.3 LL of O2 at the given temperature and pressure is 2.0 g.

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Answer:

Compound: a substance that is made up of more than one type of atom bonded together. Mixture: a combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties.

Explanation:

PLEASE ADD ME AS BRAINLIEST.

This is the mass number A. It shows the number of nucleons (neutrons and protons in the nucleus). It is made up of the atomic number Z and the neutron number N:

A = Z + N

Using the example of helium:

Helium has a mass number A of 4 and the atomic number Z 2, so the atom has 2 neutrons in its nucleus.

A = Z + N

4 = 2 + 2

The hydronium ion concentrations are

Muratic acid : 3.2E-2 M

Vinegar : 3.2E-7 M

Sodium bicarbonate solution : 3.2E-5 M

Drano : 3.2E-9 M

Hand soap : 3.2E-13 M

Muratic acid is used as bricklayer cleaner and swimming pool acidifier with pH of [H+] = 3.2E-2 M

Vinegar is used in food items and for cleaning purposes  [H+] = 3.2E-7 M

Sodium bicarbonate solution is a natural deodrant and an antacid with pH of [H+] =3.2E-5 M  

Drano is a drainage cleaner with pH< [H+] = 3.2E-9 M  

Hand soap is used for hygiene related purposes in daily life with [H+]= 3.2E-13 M.

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Answer:

regolith

Explanation:

The major organic product formed in the reaction of 1-methylcyclohexene with diborane in diglyme, followed by basic hydrogen peroxide is 1-methylcyclohexanol.

This reaction is an example of hydroboration-oxidation, which is a common method for the conversion of an alkene into an alcohol. Hydroboration is the addition of borane (BH3) to an alkene to form a trialkylborane.The reaction between 1-methylcyclohexene and diborane (BH3) in diglyme produces trialkylborane as an intermediate product as shown below.

On further reaction with basic hydrogen peroxide (H2O2) as an oxidant, the trialkylborane converts into alcohol as shown below:Thus, the final product obtained after the reaction of 1-methylcyclohexene with diborane in diglyme followed by basic hydrogen peroxide is 1-methylcyclohexanol, which is the major organic product.1-methylcyclohexanol is an organic compound with the molecular formula C7H14O. It is a secondary alcohol with a branched chain. This reaction is widely used in the production of various types of alcohols.

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Answer: Turkeys are good  for up to 2 years if frozen well in a good freezer

I recommend to at least cooking it within 1 year for the best quality if you cook it in 2 years it may lose some of its quality taste-wise.

if it's not frozen well check the texture and smell to see if its gone bad. it also depends on the type of turkey you are buying, depending on the turkey you purchase always check for an expiration date such as a butterball turkey,  so make sure you check their date.

Answer:

The youngest rock in the oceans is found at mid-ocean ridges, where they are formed continually - the oceanic crust.

Explanation:

According to Hooke's law, stretching frequencies are dependent on: a. Bond strength and molar masses of the atoms

Hooke's law states that the force needed to extend or compress a spring by some distance is proportional to that distance. In the context of molecular vibrations, this law is applied to the forces acting on atoms in a bond. The stretching frequency of a bond is influenced by the bond strength (which relates to the force constant) and the molar masses of the atoms involved in the bond. These factors determine the vibrational frequency of the bond, with stronger bonds and lighter atoms resulting in higher frequencies.

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After adding the sulfuric acid and letting that reaction proceed to completion, Copper sulfate and water chemical species were left in the beaker.

With the chemical formula H2SO4, sulfuric acid, sometimes referred to as oil of vitriol in antiquity, is a mineral acid made up of the elements hydrogen, oxygen, and sulphur. It is a viscous liquid that is miscible with water and is colourless, odourless, and viscous. Because of its strong affinity for water vapour and because it is hygroscopic and rapidly collects water vapour from the air, pure sulfuric acid does not occur naturally on Earth. Due to its potent dehydrating and oxidising qualities, concentrated sulfuric acid is extremely corrosive to various materials, including rocks and metals.

In the industrial setting, copper sulphate is made by heating concentrated sulfuric acid or copper oxides and treating them with the acid. Copper sulphate is typically bought for use in laboratories.

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