A 523.1-mg sample of impure KBr is treated with excess AgNO3 and 814.5 mg AgBr (187.774 g/mol) is obtained.  What is the purity of the KBr (119.002 g/mol)?

Q: how much copper ion remains at equilibrium?

A:

Q: How many moles of Na,SO4 are in 100.0 mL of a 0.2500 M solution ? The GFW is 142.07 g. O A. 0.0500…

A: 0.25 M Na2SO4 solution. Molarity = number of moles in 1L of solution So, 0.25 moles of Na2SO4 in 1 L…

Q: If the average molar mass of a sample of soybean oil is 1500 g/mol, how many grams of NaOH are…

A: Saponification is the process that involves the conversion of fat, oil, or lipid, into soap and…

Q: Smoke detectors in homes and apartments contain Am-241,

A:

Q: The density of a substance is 3.596 g/ml and has a weight of 32g. What is the volume?

A: Volume is defined as the total space occupied by a substance. Density can be defined as the…

Q: 40.00 mL of 0.1100 M HCl is diluted to 100 mL with H2O and titrated with 0.1M NaOH. Calculate the pH…

A: pH is generally a method to find acid or base. The ranges from 0 to 14, with 7 being neutral. pHs of…

Q: How many grams is one mole of potassium chloride KCI?

A: Moles : unit of concentration  Mole concept is used to convert mass and number of particles. 1 mole…

Q: How many moles of argon are in 40.1 g of argon?

A: In this question, we have to find the number of moles of argon in 40.1 gm of argon using the formula…

Q: 0.47 absorbance/ 4713.6 mol/L = In scientific notation please & 0.57 abosorbance/4713.6 mol/L=

A: Beer-Lambert law states a linear relationship between concentration and absorbance. When…

Q: What does the formula DPD = SF – TP mean?

A: If a solute is added to water, it decreases its diffusion pressure. The difference between diffusion…

Q: Determine the pH for the following solutions.  {H3O+}=2.4x10^-2 M

A: p in pH denotes negative of the logarithm(-log). So pH is negative logarithm of molarity of H pH…

Q: Which is the highest boiling point of 1-Octene or 1-nonene? Why?

A: Boiling points of alkenes depends on more molecular mass (chain length). The more intermolecular…

Q: If you have a sugar with a molecular weight of 315 g/mol, how many grams would you need to add to…

A: Given the molecular weight of sugar is 315g/mol. The volume of the solution is 487 mL and its…

Q: How many kilocalories are needed to vaporize 5.8 mol of Br2?

A: Bromine is a dark reddish-brown fuming liquid with a pungent odor. Denser than water and soluble in…

Q: Ammonia-containing window cleaners are considered pH-neutral substances true or false?

A: As chemicals are dissolved in water, the pH level of the mixture is either acidic or basic. pH level…

Q: Propanamide and methyl acetate have about the same molar mass, both are quite soluble in water, and…

A: Propanamide is an amide of propanoic acid with the chemical formula CH3CH2CONH2. Methyl acetate is…

Q: What is the mass in grams of 6.022 * 1023 O atoms of mass 16.00 amu?

A: The mole concept is a convenient method of expressing the amount of a substance. Any measurement can…

Q: If our alloy has a composition of 90% Sn and has a temperature of 100C, determine: a) What…

A: A phase diagram is a graph that depicts a substance's thermodynamic state at various pressures and…

Q: What is the molarity of a NaOH solution if 48.0 mLneutralizes 35.0 mL of 0.144 M H2SO4?

A: An acid–base reaction is a chemical reaction that occurs between an acid and a base. It can be used…

Q: Using your calculated concentration from the graph (in mol Cu2+/L) and the concentration of the…

A:

Q: The pH of a 0.0082 M solution of HNO₃ is

A: The pH of solution is a measure of the molar concentration of hydrogen ions in the solution and as…

Q: What mass of gallium oxide, Ga2O3, can be prepared from 29.0 g of gallium metal? The equation for…

A: A chemical reaction where there is loss of electrons or gain of oxygen and resulting in the increase…

Q: How many moles of tungsten(VI) oxide and hydrogen were required to produce the 5.00 g of tungsten?

A: Stoichiometry is a section of chemistry that involves using relationships between reactants and/or…

Q: 5. A 0.8720 g sample consisting solely of sodium bromide and potassium bromide yields 1.505 g of…

A: NaBr is sodium bromide KBr is potassium bromide  AgBr is silver bromide Molecular weight, Na=23…

Q: How many mL of 0.254 M NaOH are needed to fully react with 37.50 mL of 0.358 M H2SO4?

A: Concentration of the NaOH = 0.254 M Conc. of H2SO4 solution = 0.358 M or conc. of [H+]=2×0.358 M…

Q: The OH ] of a solution can be determined from the pOH using the equation OH"]= 10" POH

A:

Q: A 5 ml vial of hydrocortisone is having 2% (w/v) concentration. How many vials will be required, if…

A: KEY WORDS :- Formula for vial required = Dose required to prepareDose in hand×quantity

Q: How many grams of copper sulfate would you need to make 5 L of a 7 M copper sulfate solution?

A: Molarity is defined as the moles of solute per litre of the solution. Hence, our target is to make…

Q: To form S²⁻ ions from gaseous sulfur atoms requires 214 kJ/mol, but these ions exist in solids such…

A: The lattice energy is the amount of energy required in the formation of crystalline lattice of…

Q: A 75.0 g piece of Ag metal is heated to 80.0 C and dropped into 50.0 g of water at 23.2 ° C. The…

A: To find: Specific heat of silver

Q: To make up a solution of phosphate buffered saline (PBS), you need 10 mM Na2HPO4 (anhydrous) (FW:…

A: Convert the constituents in grams by multiplying with the respective molarity to convert grams per…

Q: If an unknown solution of cobalt (II) chloride has an absorbance of 0.79, what is its concentration?…

A: The Beer’s Law plot is a graphical representation of the relationship between the absorbance and the…

Q: What would be the working stock concentration (in molarity) if you diluted 250 uL of a stock…

A: Molarity is defined as the number of moles dissolves in 1000 ml of the solution.

Q: What is the pH of a solution of 100 ml of 0.01 M H3PO4 and 100 ml of 0.01 M Na3PO4?

A: A buffer is an aqueous solution containing a weak acid and its conjugate base or a weak base and its…

Q: the vapor phase concentration in ppm(v)?

A: Vapour phase concentration is the amount of water vapor present in a unit volume of air, usually…

Q: The molar stability of mercury (II) sulfide is below. What is the Ksp ?

A: Mercury II sulfide or Mercury sulfide (HgS) . It is almost insoluble in water. But, it can be…

Q: What is the empirical formula of a compound that contains 72.0% carbon, 12.0% hydrogen and 16.0%…

A: Empirical formula  It is the formula of a compound in which the exact number of each atom is not…

Q: What is ethidium bromide ?

A: Agarose gel electrophoresis is commonly used for the separation of nucleic acid molecules. It…

Q: The half-life of mercury-197 is 64.1 hours. If a patient undergoing a kidney scan is given 5.0 ng of…

A: The half life (t1/2) is defined as that period of time which is needed for one half of a given…

Q: The density of trifluoroacetic acid vapor was determined at 118.1 °C and 468.5 torr, and found to be…

A: In a chemical reaction, equilibrium is considered the state, where the rate of the forward reaction…

Q: How many moles of HCl are there in 75.0 mL of 0.160 M HCl?

A: Molarity can be stated as the soluble moles of solute, which is dissolved per liter of solution.

Q: Balance the following equation, and tell how many moles of nickel will reactwith 9.81 mol of…

A: The balanced chemical equation is a chemical equation in which both sides of equation contains equal…

Q: If 150ml of polyethylene glycol 400 weighs 74.1g, what is the specific gravity?

A: The division of density of the substance and standard density is called specific gravity. It is also…

Q: What is the mass in grams of 24.2 moles of NaCl?

A: Moles can be stated as amount of any substance, which is measured in grams, liters, atoms, or…

Q: What does “1 Millimolar” (1mM) mean

A: Milli is a suffix in measurement meaning 1/1000 or 10^-3.

Q: If the dehydration reaction of an alcohol is successful, what changes would be seen in the IR…

A: Biochemistry is a branch of biology that deals with the study of chemical processes within living…