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Q: Chemistry Question

A: 2) periodic table elements are categorised by their atomic number  3) nuclei have proton and neutron...

Q: Find the [OH-] and pH of a 0.33 M methylamine solution.

A: Methyl amine is basic in nature. When dissolved in water, it takes up the hydrogen ion from water as...

Q: What kind of intermolecular forces act between a hydrogen sulfide molecule and a nitrosyl chloride (...

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Q: What is the molar mass of cholesterol if 0.00105 mol hasa mass of 0.406 g?

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Q: Acetylene  C2H2  gas is often used in welding torches because of the very high heat produced when ...

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Q: Suppose a student starts with 2.4185 g of a sand mixture and separates the components into 1.3012 g ...

A: The mass percentage is the simplest way of representing the mass of the components present in the mi...

Q: Acetic acid, CH3CO2H, reacts with ethanol, C2H5OH, to form water and ethyl acetate, CH3CO2C2H5.     ...

A: GIVEN: Given reaction: CH3CO2H + C2H5OH ⇌ CH3CO2C2H5 + H2O To Solve: The equilibrium concentrations ...

Q: Calculate the molar solubility of barium fluoride in each liquid or solution.a. pure waterb. 0.10 M ...

A: a. A solubility product of a particular compound is the mathematical product of its dissolved ionic ...

Q: A solution of H, SO,(aq) with a molal concentration of 5.25 m has a density of 1.266 g/mL. What is t...

A: Given: Molality of H2SO4 = 5.25 m = 5.25 mol/kg Density of H2SO4 = 5.25 g/mL

Q: The element tin would be classified as: Select an answer and submit. For keyboard navigation, use th...

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Q: A 2.83 g piece of zinc (density = 7.14 g/mL) is added to a graduated cylinder that contains 12.13 mL...

A: According to the question, the graduated cylinder is filled with 12.13 mL of water. A piece of zinc ...

Q: how are atoms are composed?

A: it is made of 3 tiny partical  known as electron ,proton and neutron  Neutron  and proton make cente...

Q: KMnO4 and H2C2O4 react according to the following balanced equation: 2 KMnO4 + 5 H2C2O4 + 3 H2SO4 --...

A: The mathematical ratio between the species mass and its molar mass will be equivalent to the species...

Q: Given the balanced equation below ...CH4 + 2 O2 → CO2 + 2 H2O How many grams of water (MM = 18.02 g/...

A: The number of moles of methane, nCH4, in 555 grams of methane is calculated as shown below. The numb...

Q: A balloon filled with helium gas is found to take 6 hours to deflate to 50% of its original volume. ...

A: If the two gases (A&B) are at the same temperature and pressure, the ratio of their effusion rat...

Q: If the freezing point depression of a 0.110 m solution is 2.33 degrees Celsius, what is the freezing...

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Q: We can use Hess’s law to calculate enthalpy changes thatcannot be measured. One such reaction is the...

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Q: Explain the observation with hydroxylation of cis-2-butene with OsO4 yields a different product than...

A: Oso4 is a hydroxylation reagent  It add two OH group in double bond  With cis2-buten give me some co...

Q: The pKa values of the carboxylic acid groups of oxaloacetic acid are 2.22 and 3.98.a. Which carboxyl...

A: a. The structure of oxaloacetic acid is; The pKa value is inversely related to the acidic strength ...

Q: A 24 kt. gold nugget has a mass of 262.3 g. When placed in a graduated cylinder containing 24.0 ml o...

A: Concept introduction: Density of solution is equal to the ratio of mass to volume. Formula used: Vo...

Q: N2+2O2=2NO2 the reaction absorbs 66.2 kJ of heat per 2 mol NO2 produced. What is the value of q?

A: Heat of formation is definined  as the enthalpy change when one mole of compound is formed the eleme...

Q: Draw the pH–activity profile for an enzyme that has one catalytic group at the active site: the cata...

A: The pH-activity profile for an enzyme that has one catalytic group a general acid catalyst at active...

Q: Lavoisier developed a new theory of combustion that over-turned the phlogiston theory. What measurem...

A: Lavoisier developed a new theory of combustion and disproved the phlogiston theory. Lavoisier explai...

Q: RGB color television and computer displays use cathode ray tubes that produce colors by mixing red, ...

A: A wave is identified by its wavelength or by its frequency. Wavelength is the “distance covered by a...

Q: How can you prepare the following compound with benzene as one of the starting materials?

A: Benzene undergoes Friedal craft acylation in the presence of anhydrous aluminum chloride to give the...

Q: The chlorination of pentane gives a mixture of three monochlorinated products. Predict the ratios in...

A: The Chlorination of pentane gives three products i.e., 1-chloropentane, 2-chloropentane and 3-chloro...

Q: View image:  need ppm

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Q: HO, is a highly reactive chemical species that plays a role in atmospheric chemistry. The rate of th...

A: For a second-order reaction,

Q: Determine the hybridization of the labeled atom in attached species ?

A: Hybrid orbitals are formed when two orbitals of different atoms interact with each other. The intera...

Q: Why does water spilled on the floor evaporate even though ∆G°for the evaporation process is positive...

A: The change in Gibbs free energy is used for the prediction of direction of the chemical reaction at ...

Q: The vapour pressure of benzene at 20 °C is 10 kPa and that of methylbenzene is 2.8 kPa at the same t...

A: 4

Q: A room is 20.0 feet wide and 30.0 feet long with ceilings that are 10.0 feet high. You need to find ...

A: The volume of the room can be calculated as follows: Volume = length× width × height For the room le...

Q: How many core electrons does the element bromine have?

A: Core electrons are those electrons which do not take part in the formation of a chemical bond. Alter...

Q: A normalized wavefunction for a particle confined between 0 and L in the x direction is ψ = (2/L)1/2...

A: A normalized wavefunction for a particle confined between 0 and L in the x direction is ψ = (2/L)1/2...

Q: the insecticide DDD contains only c,h, and cl. When 3.2 g is combusted, 6.162 g of Co2 and 0.9008 g ...

A: Given : DDD contains only C, H and Cl atoms. Mass of DDD combusted = 3.2 g Mass of CO2 produced on c...

Q: How many moles of ammonia would be required to react exactly with 0.470 moles of copper(II) oxide in...

A: Balancing of chemical reaction- It consists of reactant (starting material) and products (substance...

Q: Draw and name the eight cycloalkane structures of formula C6H12 that do not show geometric isomerism...

A: Isomers are a group of molecules that have the same molecular formula but have difference in structu...

Q: How many grams of sodium iodide, NaI, must be used to produce 56.2 g of iodine, I2?

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Q: Describe the type of bond represented by the dash for each. 1. H-H 2. H-CH3 3. H-NH2 4. Na-ONa 5. Na...

A: Chemical bonds are responsible for holding the atoms in a molecule together. This holding interactio...

Q: Naming the following Polysubstituted Benzenes?

A: Given,

Q: This ene., Jiagram shows the allowed energy levels of an electron in a certain atom. (Note: the SI p...

A: The ground state of an electron is the minimum energy state that it can occupy.

Q: Propose a reagent for the conversion of (G) to racemethorphan

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Q: Can you please answer number 3 the sub problems E and F only and show all of the steps please and th...

A: 3. e.) Given: Light travels 186 000 miles/second. First determine the number of seconds value in one...

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.