How many moles of O_{2}2​ molecules are present in a 0.301 L sample of dry air at 0.0395 atm and 23.8 °C? (Oxygen constitutes 20.94% of the molecules in dry air.) (Enter your answer using either standard or scientific notation. For scientific notation, 6.02 x 10^{23}23 is written as 6.02E23.)

Q: Which does not have a noble gas configuration? A. Sc3+ B. Ar C. O2- D. K I answered A.Sc3+ which end...

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles ...

Q: Calculate the standard enthalpy of formation of liquid methanol, CH3OH(l), using the following infor...

A: For calculating enthalpy of the reaction is given as follows,

Q: If 0.600 g of KHP requires 24.86 mL of NaOH solution to consume the KHP, what is the concentration o...

A: The reaction between KHP ( i.e KHC8H8O4) and NaOH is

Q: If 0.155 moles of AgNO₃ react with 0.155 moles of H₂SO₄ according to this UNBALANCED equation below,...

A: The values are given as follows:

Q: Use the van der Waals equation to calculate the pressure (atm) exerted by 1.57 mol Cl_{2}2​(g) confi...

A: Van der waals equation is given below.

Q: Calculate the pH of a solution prepared by dissolving 0.150 mol of benzoic acid and 0.300 mol of sod...

A: The Henderson-Hasselbalch equation is given by

Q: Be sure to answer all parts.Calculate the wavelength (in nm) of light with energy 1.81 × 10−20 J per...

A: The wavelength of the photon is calculated as shown in equation (1). In equation (1), ‘E’ is the ene...

Q: Write a balanced nuclear equation for the following The nuclide cesium-137 undergoes beta emission +

A: Cesium undergoes a beta decay and converts to Barium 

Q: Describe the hydrogen bond. Explain how a neutral molecules can become polar.

A: Hydrogen bonding can take place between a highly electronegative atom and hydrogen. Intramolecular h...

Q: Balance the given equations by inserting the appropriate coeffiencients P4 + O2 -> P2O5 C2H6 + O2...

A: A balanced chemical equation or reaction is the one in which the total number of atoms for each elem...

Q: For each of the following reactions (7-20), identify if the reaction is a single replacement or doub...

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question s...

Q: Write an equation for the reaction of CH2=CHCH2CH3 with each of the following  reagents: a. H2O, H+ ...

A: A chemical reaction is symbolic representation of the conversion of substances to new substances.In ...

Q: If you added 45.5 mL of 0.058 M KMnO4, 35.6 mL of 0.6M NaOH, 75.4 mL of 0.8M Ca(OH)2, and43.5 mL of ...

A: Solution stoichiometry involves the calculation of concentration of solutions in the given condition...

Q: An exercise in lab requires you to make 500 mL of 2.3M beryllium sulfide solution. How many moles of...

A: GivenVolume of the solution = 500mlMolarity of the solution = 2.3M

Q: How can I determine the order of the reaction with respect to each reactant?  Experiment 1: .0010 M ...

A: The overall order for the given reaction is determined as follows, by calculating the order of each ...

Q: Balance the equations by inserting coefficients as needed. Sb + Cl_{2} -> SbCl_{3} GaBr_{3} + Cl_...

A: A balanced chemical equation or reaction is the one in which the total number of atoms for each elem...

Q: A He+ ion absorbed a photon with a frequency of 1.23*10^16 Hz to reach an energy level with n=4. Wha...

A: The helium ion (He+ ) is a hydrogen-like species as it has only one electron in its 1s orbital. The ...

Q: Identify each of the following molecules as polar or nonpolar: SeF2 PBr3 SiF4 SO2

A: The difference in electronegativity between fluorine and selenium is 4.0-2.4=1.6  which is less than...

Q: Water that contains deuterium rather than ordinary hydrogen is called heavy water. The specific heat...

A: Given,specific heat of heavy water at 25 deg. C. is 4.217J/g deg. CMass of water = 10gChange in temp...

Q: What is the pH and concentration of OH- of 0.0200 M CH3COONa?

A: The pH calculation from given concentration is as follows,The given compound is a salt in solid phas...

Q: Calculate the formal charge for the bonded atom in the molecule: CO BrCl3 IF7

A: Formal charge of an atom is calculated by

Q: MgNH4PO4•6H2O has a solubility of 0.023g/100.ml of water. Suppose a 5.02g sample was washed with 20....

A: The values are given as follows:

Q: What is the molarity (M) of a(n) 10% NaOH solution (m.w. = 40.00 g/mol)? How many grams of NaOH woul...

A: The values are given as follows:

Q: 8.88 A major challenge in implementing the "hydrogen econ- omy" is finding a safe, lightweight, and ...

A: a) Balance chemical reaction for the decomposition of NaAlH4 Sodium aluminium hydride is a compound ...

Q: Check please! :)

A: If a carbon atom is bonded with only one other carbon atom, then it is called primary carbon. Hydrog...

Q: A 3.00 kg sample of water is heated from 14 degrees celsius to 53 degrees celsius. How much energy i...

A: Given,Mass of water = 3kgInitial temperature = 14 degrees CelsiusFinal temperature= 53 degrees Celsi...

Q: When 20.3 mL of 0.500 M H2SO4 is added to 20.3 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50...

A: The chemical reaction that occurs between the given substances is a neutralization reaction as shown...

Q: What is an isomer? Do all isomers have the same chemical properties?

A: Isomers are the compounds which have the same molecular formula but they have different structural f...

Q: Question 5

A: The molarity of nitrate ion can be calculated by first calculating the moles of nitrate present in t...

Q: 27) The cycle of copper reactions illustrates important principles of chemical reactions. The cycle ...

A: Given,Mass of copper is 2.51 g

Q: Question 2

A: Given,The molarity of sulphuric acid in a fully charged car battery is 5.2 M.  When, fully discharge...

Q: Use the equation to answer the question. Cl2+F2--> ClF3 How many grams of ClF3 form when 0.204 mo...

A: The balanced chemical reaction is given below.

Q: Use the References to access important values if needed for this question. Use the pull-down boxes t...

A: Barium hydroxide (Ba(OH)2) is a strong base and it will be present in the ionized form in the aqueou...

Q: Use the equation for the question. P4O10 + PCl5--> POCl3 How many grams of POCl3 are produced whe...

A: Molar mass of the compound is given below,Molar mass of P4O10 = 283.886 g/mol.Molar mass of PCl5= 20...

Q: How many grams of La(IO3)3 will dissolve in 250.0 mL of 0.05 M NaIO3?

A: Given:Mass of La(IO3)3 =?Volume of NaIO3  =250.0 mLMolarity of NaIO3 = 0.05Ksp of La(IO3)3 = 7.50×10...

Q: What is the pH and concentration of OH- of 0.0200 M NH3?

A: Given:Concentration of NH3= 0.02MThe objective is to determine the pH and the concentration of OH-.

Q: ANSWERS I HAVE ARE WRONG

A: (A ) The balanced neutralization reaction is given below.

Q: Classify each of the following as ionic or molecular, and name each: FePO3 Cl2O7 Ca3(PO4)2 PCl3 Al(C...

A: It is required to classify each as ionic or molecular compound. Ionic compounds are formed by the gi...

Q: Which alkyl halide would you expect to undergo an SN2 reaction most slowly?   Question 2 options: ...

A: In SN2 reactions, inversion of the configuration of the alkyl halide takes place because the upcomin...

Q: What is the molar mass of anhydrous KAl(SO4)2? (step by step equation)

A: The given compound KAl(SO4)2 is potassium aluminium sulfate. It consists of one potassium atom, one ...

Q: 27) The cycle of copper reactions illustrates important principles of chemical reactions. The cycle ...

A: The balanced equation is given below.

Q: Which of these chemical equations does NOT describe a redox reaction?  Group of answer choices 2K...

A: The Oxidation number is predicted for the element in the given reactions as shown,

Q: Write the formula for each of the following: dinitrogen monoxide lithium carbonate magnesium hydroxi...

A: The chemical formula for dinitrogen monoxide is N2OThe chemical formula for lithium carbonate is Li2...

Q: 3. Silicon is produced for the chemical and electronics industries also by the following reaction. N...

A: Given,Mass of Si = 75g

Q: What is the defining characteristics of an acid (that is, in the Brønsted-Lowry sense)?Describe one ...

A: Brønsted–Lowry theory, also called proton theory of acids and bases, states that any compound that c...

Q: How many liters of 0.305 M K₃PO₄ solution are necessary to completely react with 187mL of 0.0184 M N...

A: The number of moles for a given chemical species are defined as the ratio of mass to the molar mass....

Q: Carbon disulfide is a foul-smelling solvent that dissolvessulfur and other nonpolar substances. It c...

A: The balanced chemical reaction is given below.

Q: Select the gas with the fastest velocity at 250 K. O2 or H2

A: The velocity and mass can be related from the equation of kinetic energy as below.

Q: A sample of SFx (g) at 25 degrees celsius, 1 atm has a density of 6.17 g/L. What is the value of X?

A: Molar mass of SFx is determined as follows,

Q: A container of gas has a initial pressure of 0.8 atm The pressure is increase to 1.1atm and the fina...

A: The gas initial volume present in a container with given final volume, initial and final pressures i...

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.