A student was given an unknown metal.  The student determined that the mass of the metal was 30.2 g.  The student placed the metal in a graduated cylinder filled with 20.0 mL of water.  The metal increased the volume of water to 22.9 mL.  Calculate the density of the metal

Q: A chemist prepares a solution of potassium iodide (KI) by measuring out 338. g of potassium iodide…

A: The is about prepared a 500 mL KI solution. We have to calculate the concentration of KI solution…

Q: A chemist prepares a solution of potassium iodide (KI) by weighing out 25.38 g of potassium iodide…

A: Mass of potassium Iodide = 25.38 g Volume of water = 100. mL The concentration is needed in the unit…

Q: A chemistry student weighs out 0.0345 g of chloroacetic acid (HCH,CICO,) into a 250. mL volumetric…

A: Molarity is defined as total number of solute present in 1000 ml of solution .   For neutralisation…

Q: A chemist must dilute 78.3 mL of 9.91 mM aqueous calcium sulfate (CaSO4) solution until the…

A: For dilution, we can use the formula:Here, M1 = molarity of the original solutionV1 = volume of the…

Q: A sample is found to contain 8.47×10-6 g of salt. Express this quantity in nanograms.

A: Given that Mass of sample (salt) = 8.47 × 10-6 g Mass of sample  = ? ng

Q: A chemist must prepare  550.mL  of  60.0mM aqueous potassium dichromate  K2Cr2O7 working…

A: Dilution is the process of decreasing the concentration of a solute by mixing more solvent. Dilution…

Q: A chemistry student weighs out 0.0906 g of lactic acid (HC,H,0,) into a 250. mL volumetric flask and…

A:

Q: A chemist must dilute 85.6 mL of 119. mM aqueous potassium permanganate (KMnO4) solution until the…

A:

Q: A chemist must prepare 750. mL of 1.00 M aqueous nickel(II) chloride (NiCl₂) working solution. He'll…

A:

Q: A chemist prepares a solution of calcium bromide (CaBr₂) by measuring out 390. g of calcium bromide…

A: Given, mass of calcium bromide (CaBr2) = 390. g Volume of the flask = volume of the solution = 450.…

Q: A chemist must prepare 450. mL of 1.00 M aqueous barium chloride (BaCl,) working solution. She'll do…

A: Molarity of stock BaCl2 solution(M1) = 1.27 M  Molarity of final BaCl2(M2) = 1.00 M V2 = 450. mL

Q: Calculate the volume of NaOH  solution the student will need to add to reach the equivalence point

A: Given ;-  Mass of HClO = 0.0909 g  Volume of HClO solution = 250.mL  Molar concentration of NaOH…

Q: A chemist must dilute 90.2 mL of 6.73 M aqueous silver perchlorate (AgCIO4) solution until the…

A:

Q: chemistry student weighs out 0.160g of sulfurous acid H2SO3, a diprotic acid, into a 250.mL…

A: The balanced chemical equation for the reaction between H2SO3 and NaOH is: H2SO3 + 2 NaOH → Na2SO3 +…

Q: The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.5…

A:

Q: The stockroom has provided you with a 1.60 M stock solution of NaCl. What volume of this stock…

A: Dilution of the solution: When we dilute a concentrated solution with pure water, the mole of solute…

Q: laboratory procedure calls for making 510.0 mL of a 1.3 MKNO3 solution. How much KNO3 in grams is…

A:

Q: Suppose

A:

Q: A chemist must dilute 44.5 mL of 443. mM aqueous copper(II) sulfate (CuSO4) solution until the…

A:

Q: mol aqueous L A chemist must prepare 650. mL of 4.00 M aqueous nickel(II) chloride (NiCl,) working…

A:

Q: cur. How many grams of H2 will be produced? (s) +2 HCI(s) → MnCl2(aq) + H2(g) ease type in your…

A:

Q: A 25.0 mL aqueous stock solution of 3.7 M NaF is diluted to a final concentration of 1.8 M. What is…

A:

Q: Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

A: As given in the question that butane reacts with gaseous oxygen to produced carbon dioxide and…

Q: A chemist must dilute 39.0 mL of 2.99 M aqueous aluminum chloride (AlICi,) solution until the…

A:

Q: The mass of a uranium atom is 3.9526 × 10-22 grams. What is this value in nanograms? In your…

A: The mass of uranium atom = 3.9526×10–22 grams

Q: A chemist must prepare 750. mL of 240. mM aqueous sodium carbonate (Na₂CO3) working solution. He'll…

A:

Q: A prescription requires an 0.67 mL injection of a 1:100 solution of a drug. The pharmacy only…

A:

Q: A chemist prepares a solution of barium chloride (BaCl2) by measuring out 1.1x102 mol of barium…

A: The moles of barium chloride given is .The volume of the solution is .To find the concentration of…

Q: A chemist must dilute 45.2 mL of 3.27 M aquaous calcium bromide solution until the concetration…

A: As we know ,Moles the solute remains same on dilution but volume of the solution increases.Dilution…

Q: A chemistry student weighs out 0.182 g of sulfurous acid (H₂SO3), a diprotic acid, into a 250. mL…

A:

Q: A piece of metal ore weighs 8.75 g. When a student places it into a graduated cylinder containing…

A: The density of the ore is to be calculated

Q: A chemist must dilute 0.0659 L of 2.78 M aqueous sodium chloride (NaCl) solution until the…

A: Given: The initial molarity of sodium chloride = 2.78 M The initial volume of NaCl solution = 0.0659…

Q: A chemist prepares a solution of sodium nitrate (NaNO3) by measuring out 21.4 g of sodium nitrate…

A:

Q: You can identify a metal using its density. If you have a metal brick that you measured to be 4…

A:

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

A: Mass of hydrobromic acid (HBr) = 0.81 gMass of sodium hydroxide (NaOH) = 0.124 gMaximum mass of…

Q: Analysis of a sample showed that it contained 68.3% lead, 10.6% sulfur, and 21.1% oxygen. What is…

A:

Q: A chemist prepares a solution of barium chloride (BaCl₂) by measuring out 26.5 μmol of barium…

A: Given  BaCl2 measurement in a volumetric flask  is Number of moles = 26. 5 numol Volume   = 300.mL…

Q: A chemist must dilute 42.4 mL of 483. mM aqueous potassium dichromate (K,Cr,O,) solution until the…

A: Given : Concentration of K2Cr2O7 to be prepared = 380 mM = 0.380 M                  (since 1 M =1000…

Q: The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.5…

A: The reaction for the decomposition of KClO3 is shown below:

Q: The standard definition of a quart is equal to 947 mL. Calculate the percent error of a student's…

A: Given  Actual value of quart=947 mL The measured value of quart=938 mL Percent error has to be…

Q: A chemist must dilute 56.7 mL of 217. mM aqueous sodium thiosulfate (Na₂S₂O3) solution until the…

A:

Q: A piece of metal ore weighs 9.00 g. When a student places it into a graduated cylinder containing…

A: Given:Mass of piece of metal = 9.00 g = 9.00x10-3 Kg.Volume of cylinder without metal piece = 21.25…

Q: In the lab you weigh 12.54 g of NaCl to make a stock solution of 5.12 M. To further dilute the…

A: Given data, Initial concentration (stock solution M1) Final concentration (M2) Final volume (further…

Q: 2. You purchase a rectangular piece of metal that has  dimensions 5.0 X 15.0 X 30.0 mm and mass…

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

Q: A student pipetted 10 mL of a sample solution into a 250 mL volumetric flask and diluted it to the…

A: At first 10 mL of original solution is taken in 250 mL flask and the rest 240 mL of water is added…

Q: An analytical chemist weighs out 0.181 g of an unknown diprotic acid into a 250 mL volumetric flask…

A:

Q: A chemist must prepare 550. mL of 1.00 M aqueous calcium bromide (CaBr₂) working solution. He'll do…

A: As we know , Moles the solute remains same on dilution but volume of the solution increases.…

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.