A student sets up the following equation to convert a measurement. (The ? stands for a number the student is going to calculate.) Fill in the missing part of this equation. Note: your answer should be in the form of one or more fractions multiplied together. (87. Pa·cm = ? kPa· m ?

Q: A chemist adds 650.0 mL of a 5.99 g/dL potassium dichromate (K,Cr,O,) solution to a flask. Calculate…

A: Step 1. Calculate Molarity of potassium dichromate (K2​Cr2​O7​) solution:   Strength of potassium…

Q: A chemistry student weighs out 0.0553 g of acrylic acid (HCH,CHCO,) into a 250. mL volumetric flask…

A: Given : Mass of HCH2CHCO2 = 0.0553 g  And concentration of NaOH solution = 0.0600 M The…

Q: A chemistry student weighs out 0.155 g of lactic acid (HC,H,O3) into a 250. mL volumetric flask and…

A: Lactic Acid is:- HC3H5O3 The molar mass of lactic acid is :- 90.08g/mol Weight of Lactic acid used =…

Q: When you perform the following operations, how many significant figures should your answer have?…

A:

Q: Classify each change as physical or chemical. (a) the rusting of iron(b) the evaporation of…

A: Physical change changes the size, shape or phase of substance, Chemical change is a type of change…

Q: The diagram on the left represents the result of a process. Which of the diagrams [(i) to…

A: The diagram which represent the starting material if the process were physical, and which could…

Q: 2H*(aq) + Sn(s)–H2(g) + Sn²*(aq) ificant figures during intermediate calculations to avoid round off…

A: The cell reaction is: Sn + 2H+   ----->  Sn2+   +  H2 We have : E°cell = E°H+/H2   -   E°Sn2+/Sn…

Q: The distance from San Francisco to Los Angeles is approximately 385 miles. You and your friends…

A: Total distance between san francisco to los angeles = 385 miles Amount of Water have to drink per km…

Q: A 10.00 mL solution of a certain food dye has a concentration of 1.47 g /L. What is the total mass…

A: Given: The concentration of food dye  solution, (C) = 1.47 g/L. The volume of the solution, (V) =…

Q: The mass of solute per 100 ml of solution is abbreviated as (m/v). Mass is not technically the same…

A:

Q: A chemist prepares a solution of magnesium fluoride (MGF2) by measuring out 0.026 umol of magnesium…

A: 1micro mole = 10^-6 mole 1L = 1000ml

Q: It has been estimated that there is 4 x 10^-4 mg of gold per liter of seawater. At a price of…

A: 1 km3 = 1015 cm3. 1 cm3 = 1 milliliters 1 L = 1000 milliliters 1 L = 1000 cm3 1015 cm3 can be…

Q: A chemist prepares a solution of nickel(II) chloride (NiCl,) by measuring out 4.2 umol of nickel(II)…

A: No. of mol of NiCl2 =4.2 μmol Conversion of μmol to mol: Conversion of mol into mmol:

Q: calculate volume H2=Volume displaced water

A: Given Mass of Empty Beaker is 141.2g, Beaker + Water is 388.3g,  mass of water is 247.1g, volume of…

Q: The quantitative significance of “take a deep breath" varies, of course, with the individual. When…

A:

Q: A manufacturer of paint claims that a gallon (3.78L) of latex paint can cover 365 ft2 of the surface…

A: A numerical problem based on dimensional analysis, which is to be accomplished.

Q: A chemist must prepare 300.mL of 2.00M aqueous silver perchlorate AgClO4 working solution. He'll…

A: Dilution equation:                                                  M1V1 = M2V2 where, M1 = Initial…

Q: The process in which adding a chemical compound to another chemical compound and observe physical…

A: Since we are observing physical changes only. Physical properties reflect quality of a substance.…

Q: Assuming that gasoline is 100% isooctane and that the density of isooctane is 0.792 g/mL, what mass…

A: Given reaction,        C8H18 + 12.5O2  → 8CO2 + 9H2O

Q: A chemist prepares a solution of silver(I) nitrate (AgNO3) by measuring out 1.9 × 10 μmol of…

A:

Q: When 35.0 grams of KBr are dissolved in 245 grams of water, an expression for the resulting solution…

A: Answer is  a) 35.0 g KBR per 280 g solution

Q: One method of manufacturing chlorine gas in a laboratory is to react manganese (IV) oxide with…

A:

Q: What is the symbol for the quantity defined by this expression: - log [H3O+]

A: This expression tells that the blank is the negative logarithm of the hydronium ion concentration.…

Q: When you perform the following operations, how many significant figures should your answer have?…

A:

Q: A chemist prepares a solution of magnesium fluoride (MgF,) by measuring out 0.018 µmol of magnesium…

A: We know that, Concentration (Molarity) = number of moles/volume in litre And, Number of Moles =…

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: It is given that,       Initial concentration of salt dissolved in        Lake…

Q: A chemistry student weighs out 0.135 g of acetic acid (HCH,CO,) into a 250. mL volumetric flask and…

A: Given: mass of acetic acid = 0.135 g Volume of acetic acid solution = 250.0 mL Concentration of NaOH…

Q: A chemistry student weighs out 0.159 g of ascorbic acid (H,CH¸O.), a diprotic acid, into a 250. mL…

A: At equalvalence  point no of milimoles  of acid equal  to no of milimoels  of  base  Formula  used…

Q: Knowing that 1 calorie = 4.184 joules and 1kWh = 3.6 x 106 Joules, convert the following: 2739…

A: Given: 1 calorie = 4.184 joules 1kWh = 3.6 x 106 Joules Toconvert: 2739 teraWh into nanocalories.

Q: Density = (0.9M x 36.46g/mol)/36              = 32.814/36              = 0.9115g/mL My problem is…

A:

Q: A solution is prepared by dissolving 72.91 g of CdCl2 (MM = 183.317) in enough water to make 158.95…

A: Given:Mass of CdCl2 =72.91 gMolar mass  of CdCl2 =183.317gVolume of solution =  158.95 mL…

Q: Give an example of a mixture in which solute is solid and solvent is liquid.

A: NaCl (ionic solid) Water (liquid) Salt water

Q: A chemist prepares a solution of sodium thiosulfate (Na,S,0,) by measuring out 111. g of sodium…

A: Answer :- 3.51 mol/L  The concentration of sodium thiosulfate solution = 3.51 mol/L…

Q: Classify each property as physical or chemical. a. the boiling point of ethyl alcohol b. the…

A: Physical property: Property of material which can be obtained without disturbing identity of…

Q: Sodium carbonate dissociates when it dissolves in water as follows:   If the concentration of…

A:

Q: A chemist prepares a solution of barium acetate (Ba(CH,CO,),) by measuring out 1.3 x 10 umol of…

A:

Q: When 25.0 grams of NaCl are dissolved in 675. grams of water, an expression for the resulting…

A: Given: Weight of NaCl = 25.0 g Weight of water = 675 g

Q: A solution of cobalt(II) chloride is analyzed, and the concentration of cobalt(II) ions is found to…

A: The given data is as follows: The concentration of cobalt(II) ions = 0.42 mol/L The concentration of…

Q: Carry out each of the following calculations, paying special attention to significant figures,…

A: Significant figures can be defined as a total number of digits in number including the last digit…

Q: When you perform the following operations, how many signifcant figures should your answer have?…

A: Addition of significant figures :- The answer of addition should be rounded to the same number of…

Q: A student needs to prepare 100. mL of 0.618 M Cu(NO3)2 solution.  What mass, in grams, of copper(II)…

A: The mass of required copper(II)nitrate is determined by using given volume and molarity.The molarity…

Q: A chemist prepares a solution of mercury(I) chloride (Hg,CI,) by measuring out 0.389 mg of…

A: given :-  mass of Hg2Cl2 = 0.389 mg  volume of solution = 100. mL  To calculate :-  concentration of…

Q: Automobiles are often implicated as contributors to global warming because they are a source of the…

A: In a balanced chemical reaction the reactions react and products form in the molar ratio of their…

Q: One student measured 25 cm3 of a 1.06 g / dm3 sodium carbonate solution. Calculate the mass of…

A: Given Volume of sodium carbonate = 25 cm3  Density of sodium carbonate = 1.06 g/dm3

Q: Aqueous hydrochloric acid (HCl) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A:

Q: A geochemist measures the concentration of salt dissolved in Lake Parsons and finds a concentration…

A: Given: Concentration of salt dissolved in Lake Parsons = 28.44 g/L Average concentration of salt in…

Q: A chemist prepares a solution of aluminum sulfite (Al, (SO,)) by measuring out 1.5 × 10" umol of…

A: Number of moles of solute present in 1 liter of solution is known as molarity of the solution.

Q: Give the mass of the solute and mass of the solvent for 1.30 LL of a solution that is 17.0 %% of…

A: Given, % by mass of Pb(NO3)2 = 17.0 % Volume of solution = 1.30 L = 1300 mL     (1 L = 1000 mL)…

Q: A chemist prepares a solution of silver perchlorate (AgClO,) by measuring out 1.07 kg of silver…

A: Given, mass of AgClO4 = 1.07 kg = 1.07 × 1000 g = 1070 g Volume of the solution = 250 mL = 0.250 L…

Q: A chemist prepares a solution of silver(I) perchlorate (AgCIO,) by measuring out 4.4 x 10 umol of…

A: Number of mol of silver (I) perchlorate (AgClO4 ) = 4.4 × 102 u mol  ...Or  because 1u (micro) =…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.