Chemistry Question

Q: One cup of coffee with a mass of 216 g of coffee contains 85 mg of caffeine. What is the concentrati...

A: The mass of coffee is 216 g which contains 85 mg of caffeine. The concentration in % (m/m) can be ca...

Q: In a calibration of a calorimeter, 50.3 g of water at 60.5 degrees C is added to 48.7g of water at 1...

A: GivenMass of 1st lot of water = 50.3gTemperature (T1) = 60.5°CMass of 2nd lot of water = 48.7gTemper...

Q: Aqueous sulfuric acid (H,SO4 reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium sul...

A: Moles of sulfuric acid and sodium hydroxide can be calculated as

Q: Balance each equation by inserting coefficients as needed. equation 1: KHF2⟶KF+H2+F2 ...

A: The term chemical equation for a given chemical reaction refers to the symbolic representation in th...

Q: 12. Many common titrations involve the reaction of an acid with a base. A 15.00 mL sample of H2SO4 s...

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

Q: Calculate the concentration of 653 mg casein in 16 mL of milk in %(m/v). State your answer rounded t...

A: Moles of casein present in 653mg can be calculated as

Q: The rate of consumption of B in the reaction A + 3B --> C +2D is 2.7 mol dm-3s-1. State the react...

A:

Q: Draw the structure of a salt bridge between two keratin protein strands. What kinds of ions become c...

A:  Hair contains a protein known as keratin. Keratin contains three bridges: hydrogen bonds, salt brid...

Q: Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s)...

A: Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s)...

Q: Using a group theory approach and the CO bond vectors as your basis determine if Cr(CO)6 is IR-activ...

A: The point group for the given molecule is Oh and the character table for this point group is shown b...

Q: Please solve for a and b

A: (a)The total amount of heat evolved is equal to addition of heat absorbed by water and the heat abso...

Q: What volume (in mL) of 0.300 M HCl would be required to completely react with 5.00 g of Al in the fo...

A: The number of moles of aluminium can be calculated as,

Q: Iron titanate, FeTiO3, forms in the ilmenite crystal structure that consists of an HCP arrangement o...

A: (a)The formula unit of iron titanate can be written as FeO TiO2.Calculating the cation-to-anion radi...

Q: Which of the following unbalanced reactions are precipitation reactions?Select all that are True.  B...

A: Precipitation reactions are defined as the reactions in which an insoluble solid product is formed a...

Q: 6. In the molecular weight determination by the Dumas method, as illustrated below, several grams of...

A: The mass of the bulb filled with vapor was 36.127 g;The mass of the empty (evacuated) bulb was 35.42...

Q: Dimethyl ether, a useful organic solvent, is prepared in two steps. In the first step, carbon dioxid...

A: Given,

Q: Be sure to answer all parts.Calculate the concentration of OH− ions in a HCl solution whose hydrogen...

A: Concentration of OH- can be determined using given equation,

Q: college.com/course.html?courseld=15539865&Heplb=67br| Sugar O Shop | Origami Owl Wholesale Glass... ...

A: The number of moles of any substance is equal to the Avogadro number which means that 1 mole of iodi...

Q: Calculate the ionic strength of 0.1125 M Fe(NO3)3

A: The ionic strength of a solution of a known concentration is calculated by equation (1) where C1 and...

Q: Calculate the ionic stegth of  0.0333 M Na3PO4

A: Ionic equation is by:

Q: Iron(III) oxide reacts with carbon monoxide according to the equation: Fe2O3 (s)3CO (g)+2Fe(s) 3CO2(...

A: The term limiting reagent in a given reaction is defined as the chemical species which is totally co...

Q: At room temperature 100mL of water will dissolve 36.0g of salt. How many grams of salt will dissolve...

A: At room temperature 100 mL of water will dissolve 36.0g of salt. The mass (grams) of salt that will ...

Q: A 30.0-mL sample of 0.165 M propanoic acid is titrated with 0.300 MKOH. A) Calculate the pH at 0 mL ...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: construct the molecular orbital diagram for H2−   and then identify the bond order

A: The molecular orbital diagram of H2- molecule is,

Q: Two particles with charges ?1q1 and ?2q2 are separated by distance ?.d. Arrange these scenarios acco...

A: The magnitude of the electrostatic potential energy can be calculated as follows,

Q: The AHfus of gold is 12.55 kJ-mol1, and its ASfus is 9.384 J-mol1.K-. What is the melting point of g...

A: The term enthalpy of fusion for a given substance can be defined as the change in enthalpy which is ...

Q: The last part of this question. The catalytic decomposition of hydrogen peroxide can be expressed as...

A: Given that,

Q: If we allowed our soap to dry for 1 week the mass would change.  a. Will the mass increase or decrea...

A: Density is a physical quantity that can be determined with the help of the mass and volume of the gi...

Q: Enter your answer in the provided box. Calculate the pH of a 0.083 M Ba(OH)2 solution. pH =

A: The given base is strong base that dissociates completely into ions as,

Q: Zinc reacts with hydrochloric acid according to the reaction equation shown.   Zn(s)+2HCl(aq)⟶ZnCl2(...

A: Calculation for number of moles of Zn:

Q: Using stoichiometry, calculate the volume of O2 gas at 1.25 atm and 18.0 ̊C, which forms when 10.5 g...

A: The given reaction is

Q: Calculate the w/v percentage of each of these solutes: A. 623 mg of casein in 15 mL of milk B. 74 mg...

A: Part-a: 623 mg of casein in 15 mL of milk Formula to calculate w/v percentage :w/v percentage = mass...

Q: Enter your answer in the provided box. The pH of a certain orange juice is 3.78. Calculate the H+ io...

A: Given,The pH of a certain orange juice is 3.78

Q: Which of the following electron transitions in the hydrogen atom is associated with radiation having...

A: The wavelength of the light emitted is determined by

Q: Enter your answer in the provided box. Nitric acid (HNO3) is used in the production of fertilizer, d...

A: pH of the solution can be determined using the given formula,

Q: Write the balanced molecular equation for the neutralization reaction between HIHI and Ba(OH)2Ba(OH)...

A: When an acid and base reacts with each other to form salt and water and involves H+ and OH- ions in ...

Q: Chemistry Question

A:

Q: Al:CuCl2 ratio Mass of Al (g) Calculated mass of CuCl2 (g) 1:1 mass ratio 0.250   2:1 mass ratio...

A: Mass ratio:

Q: Elements with ________ first ionization energies and ________ electron affinities generally form ani...

A: Anions are formed by gaining of electrons.They won`t loss electrons easily, so to remove electron ve...

Q: A sample of gas with a mass of 1.020 g occupies a volume of 762 mL at 0 °C and 1.00 atm (STP). What ...

A: The ideal gas equation is written below.PV = nRT         ….. (1)                Here, P is the press...

Q: Classify the possible combinations of signs for a reaction's Δ?ΔH and Δ?ΔS values by the resulting s...

A: The Gibb’s free energy change is expressed as:

Q: 11.27 Ethylene glycol (HOCH2CH2OH), the major substance in antifreeze, has a normal boiling point of...

A: The boiling point of a given liquid can be defined as the temperature at which the vapor pressure of...

Q: MONTR Cryahoga Commnity College 27) Hydrolysis of an ester: O II CH,-C-O-CH,-CH,-CH,+ H,O 28) Acid/ ...

A: “Since you have asked multiple question, we will solve the first question for you. If you want any s...

Q: When a 4.25-g sample of solid ammonium nitrate dissolves in 60.0 g of water in a coffee-cup calorime...

A: Given,Mass of sample = 4.25-gInitial temperature = 22 degree CelsiusFinal temperature = 16.9 degree ...

Q: 17. Given the Ks for the reactions, calculate AG°S. Values given for 298 K. Kc 50.5 a. H2+ 12g)2 H) ...

A: (a)ΔGos can be calculated as follows,

Q: MONOR TALK Cuyahoga Oumunity College Rank the following molecules (1-5) from the highest boiling poi...

A: Note: Since we only answer up to 1 question at a time. We’ll answer the first question. Please resub...

Q: What is the molarity of the solution obtained by diluting 125 mL of 2.50 M NaOH to 575 mL? a. 1...

A: Molarity of solution after dilution can be calculated using formula,

Q: Give the conditions for a neutral aqueous solution at 25 Celcius, in terms of [H+], pH, and the rela...

A: For a neutral solution at 25oC,The ionic product, Kw is 10-14