A surgeon removed a deposit of cholesterol, C27H46O, from a patient's artery. Determine the number of cholesterol molecules in 3.90 mg of cholesterol.  options:   1.65 × 10–22   6.07 × 1018   6.07 × 1021   0.00390   none of these are reasonable

Q: If 30.0 mL of 0.150 M CaCl2 is added to 15.0 mL of 0.100 M AgNO3, what is the mass in grams of AgCl…

A: Here we are required to find the mass of AgCl precipitate formed

Q: 3 A. If the volume of a solution with a concentration of 0.100 M is 250 ml. What's the mass (grams)…

A: Since all four questions are different, we solve only first question according to Bartleby…

Q: In order to form a monolayer of stearic acid (in a petri dish that measures 14.50 cm in diameter),…

A: Density of a substance is useful in the identification of pure substances and characterization with…

Q: Flubberium (Symbol Fb) has a atomic mass of 3.8 grams, Vibranium (Symbol Vi) has an atomic mass of…

A: Given Molar mass of flubberium (Fb)= 3.8g Molar mass of Vi = 5.2 g Percentage composition of Fb is…

Q: What mass of concentrated sulfuric  ( a 95% solution of H2SO4 by mas) is needed to prepare 500. g of…

A: The mass of solute in gram present in 100 g solution is known as the mass percent concentration of a…

Q: 8) What volume of 0.123 M NaOH contains 25.0 g of NaOH? Express your answer in milliliters.

A: Molarity = 0.123 M

Q: A chemist prepares a solution of sodium bromide (NaBr) by measuring out 33. mg of NaBr into a 250.…

A:

Q: 1) What mass of NaOH (in grams) do you need to make 250.0 mL of a 1.50 M NaOH

A: The molarity of the solution is given by the equation, molarity=moles of solutevolume of solutionL…

Q: HOU X 2(e) 95 100 100 X 7500 "Normal" saline has a concentration of about 0.89%, a value that is…

A:

Q: hospital pharmacist wants to use three lots of zinc oxide ointment containing, respectively, 40%,…

A:

Q: professor Scimemi has accepted you as a Master’s student and you are involved in a project that…

A: You need to make 2.5 mM KCl. The formula for weighing is as follows: Amount of KCl (g) = [Molarity…

Q: What is the balanced chemical reaction for the combustion of TNT in air. Please use lowest possible…

A: C7H5N3O6(s) + O2(g) ----> CO2(g) + H2O(g) + N2(g)  The balance chemical equation for this…

Q: In one experiment, 0.0995M HCl was used to analyze soda ash and the following data were obtained:…

A: Stoichiometry of a balanced chemical gives the relationship between the amount of reactants and…

Q: (a) If 1500 L of hard water contains 0.020 M Ca 2+ and 0.0040 M Mg2+, how many moles of Na + is…

A: a) Given Data:ca2+=0.020M;mg2+=0.0040Mtotal solution=1500 L∴ 1 L 0.02M ca2+=0.02mole ca2+∴1500 l…

Q: A chemist adds 40.0 mL of a 0.083 mmol/L sodium thiosulfate (Na, S,0,) solution to a reaction flask.…

A:

Q: oluene 1C7H82 weighs 5.0 g and benzene weighs 225 g in a solution with a density of 0.876 g/mL. The…

A: Molarity of solution is defined as number of moles of solute dissolved per litre of solution.

Q: What is the mass in grams of potassium dichromate(K2Cr2O7) are required to prepare a 350 cm3…

A: Given :- volume of solution = 350 cm3 molarity of potassium dichromate solution = 5.16 M or 5.16…

Q: What is the weight, in grams, of 1 quart of a mixture of equal parts of alcohol (sp.gr. 0.812) and…

A: Given : Specific gravity of alcohol = 0.812 Specific gravity of glycerin = 1.25

Q: Oralife® is a white ointment containing Peppermint Oil BP 5.3 mg/g, Wool Fat BP 53 mg/g, and…

A: The 'weight by weight' or w/w is a concentration term that indicates the amount of solute present in…

Q: If a student wants to make 175.0 mL of a 5.85M stock solution of MnCl 2, how many grams of solid,…

A: Given  Volume of solution = 175 ml Molarity of solution = 5.85 M

Q: What volume of a 1.63 mass % solution of Mg(NO 3)2 is needed to contain 0.316 grams of…

A:

Q: What is the mass in grams of potassium dichromate(K2Cr2O7) are required to prepare a 350 cm3…

A: We know that, molarity is an unit of concentration. It is defined as the number of moles of solute…

Q: What is the mass in grams of potassium dichromate(K2Cr2O7) are required to prepare a 350 cm3…

A:

Q: A chemist adds 390.0mL of a 8.14*10^−5M zinc oxalate ZnC2O4 solution to a reaction flask. Calculate…

A: We have to first calculate moles of zinc oxalate

Q: 30. The molarity of a solution containing 2.5 mol of acetic acid, HC2H3O2, in 400. mL of solution is…

A:

Q: A chemist adds  380.0mL  of a  1.9/molL  potassium iodide  KI  solution to a reaction flask.…

A:

Q: Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s) + 2HCI(aq) → ZnCl2(aq) + H2(g) What…

A: Using stoichiometric ratio we can determine how many moles of each reactant reacts . From that we…

Q: How many grams of ASA, C9H8O4, are present in 250.0 mL of 3.0 x 10-3 M C9H8O4? The molar mass of…

A:

Q: 0.6184g of MgSO4 was added to 250.00mL volumetric flask. Find the concentration of Mg+2 in the…

A: Given, amount of MgSO4 added to volumetric flask = 0.6184 gram  Volume of volumetric flask = 250.0…

Q: 3.45 mol of LiCl in 3.53 L of solution Express the molarity in moles per liter to three significant…

A: Given  (a)  Number of mole of LiCl = 3.45 mole        Volume = 3.53 Liter        Molarity = ?  (b)…

Q: A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 2.3g of MgCl2 into a…

A: The solubility of MgCl2 in the water at normal conditions is very high, so 2.3 g of MgCl2 is…

Q: As part of the aspirin synthesis lab the orgo students also had to perform the following calculation…

A: For determining the amount of product, the mole ratio of reactants in a balanced reaction must be…

Q: What mass of concentrated sulfuric  ( a 95% solution of H2SO4 by mas) is needed to prepare 500. g of…

A:

Q: Calculate the molarity of a solution prepared by dissolving 12.50 grams of NaNO3 in 250. mL of…

A: Molarity is defined as the moles of solute present in one liter of solution.

Q: A chemist prepares a solution of sodium carbonate Na2CO3 by measuring out 11.μmol of sodium…

A: Molarity = (no.of moles of solute÷ volumeof solutionin liter)

Q: What is the mass in grams of potassium dichromate(K2Cr2O7) are required to prepare a 350 cm3…

A: Mass can be find by using the formula of concentration.   Just put the values of given quantities,…

Q: An aqueous solution of chromium(III) sulfate,Cr (SO4)3 , contains 8.67 grams of chromium(III)…

A: Recall the expression of weight/weight percent of a solution                         ww% of…

Q: What volume (in mL) of a soft drink that is 10.5% sucrose (C12H22O11) by mass contains 78.5 g of…

A:

Q: 2. a) If 24.8 grams of an aqueous solution of iron(III) nitrate, Fe(NO3)3, contains 7.33 grams of…

A: a) Given that : Mass of iron nitrate solution = 24.8 g Mass of iron nitrate = 7.33 g Mass percent of…

Q: One of the ionic compounds in sports drinks is potassium dihydrogen phosphate (KH2PO4). The label on…

A: The question is based on the concept of solutions.   molarity is a method of expressing…

Q: You dilute the river water 10 times for the analysis of SDS concentration. The instrument measures…

A:

Q: A chemist prepares a solution of potassium bromide    KBr    by measuring out  0.17g  of  KBr…

A: Given : Mass of KBr dissolved = 0.17 g Volume of final solution = 300 mL = 0.300 L…

Q: What volume in liters of 0.125 M H2SO4 is required to neutralize a solution prepared by dissolving…

A:

Q: Commercial grade fuming nitric acid contains 90% HNO3 by mass with its density of 1.50 g/mL Its…

A:

Q: The average concentration of dissolved gold in earth's oceans is  5.8 x 10^−9 g/L. of ocean…

A: 6380 μgram of gold are in 1.1x103 m3  of ocean water

Q: What mass in grams of solute is needed to prepare 0.110 L of 0.126 M K2Cr2O7? Express your answer to…

A:

Q: What is the molarity (M) of a solution containing 72.3 grams of potassium nitrate (MM = 101.11…

A: Given values are, Mass =72.3 g Molar mass=101.11 g/mol Volume of solution = 750.0 mL=0.750 L

Q: What is the mass in grams of potassium dichromate(K2Cr2O7) are required to prepare a 350 cm3…

A:

Q: How many grams of sodium dichromate, Na2 Cr2 07, should be added to a 250.0-mL volumetric flask to…

A: ★ Answer: 5.04 grams of sodium dichromate should be added.   Na2Cr2O7 =( 22.98×2)+( 51.99×2)+…