A chemistry student needs 40.0mL of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of pentane is ·0.626gcm−3 . Calculate the mass of pentane the student should weigh out. Be sure your answer has the correct number of significant digits.

Q: It has been estimated that 8.0 × 104 tons of gold (Au)have been mined. Assume gold costs $1350 per…

A: Given that : Mass of gold = 8.0×104 tons Cost of gold = $1350 per troy ounce Worth of gold =? (1…

Q: A chemist measures the amount of chlorine gas produced during an experiment. She finds that 59.1 g…

A: The answer to the following question is:

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 chemist prepares a solution of magnesium fluoride MgF2 by measuring out 0.0042μmol of magnesium…

A: Given that: Moles of Magnesium fluoride = 0.0042μmol Volume = 450 mL = 0.450L Concentration =?

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: Name the SI base units that are important in chemistry,and give the SI units for expressing the…

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

Q: The concentration of mercury in a polluted lake is 0.33 micrograms per liter of water. What is the…

A: Given,Volume of the lake = 1.5 x 1012cm30.33 micrograms per liter of water

Q: A chemist adds 335.0 mL of a 1.0 x 10 chemist has added to the flask. Be sure your answer has the…

A:

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: What is the concentration of hydroxide ion in a 0.060 mol dm-3  aqueous solution of methylamine,…

A:

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

A:

Q: A chemistry student needs 70.0 g of tetrahydrofuran for an experiment. By consulting the CRC…

A:

Q: Calculate the concentration in /μmol/L of the chemist's magnesium fluoride solution.

A: Given :- number of moles of MgF2 = 0.00387μmol  Volume of solution = 100 mL  To be calculated :-…

Q: A homogeneous mixture was prepared by mixing 0.90 g A, 105.7 g B and 48.17 g C. The volume is found…

A: Given, Volume of mixture = 56.6 cm3 Mass of A = 0.90 g Mass of B = 105 .7 g Mass of C = 48.17 g

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

A: Chemical reaction- It consists of reactant (starting material) and products (substances formed in…

Q: The chemical formula for cesium chloride is CsCl. A chemist determined by measurements that 0.065…

A: We can find the mass of any substance from its molar mass.  The formula is : Mass of any substance =…

Q: A chemistry student needs 15.0mL of tetrahydrofuran for an experiment. By consulting the CRC…

A:

Q: An instrument used to detect metals in drinking water can detect as  little as 1 μg of mercury in 1…

A: According to this question, Using formulas are  No.of atoms in V Ltrs of water = mass in V Ltrs…

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: hemist must dilute 95.2 mL of 1.14 mM aqueous magnesium fluoride (MgF₂) solution until the…

A:

Q: A chemist adds  925.0mL  of a  /0.00469gL  copper(II) fluoride  CuF2  solution to a flask.…

A:

Q: Calculate the mass of camphor C10H16O  that contains a trillion  ×1.01012  carbon atoms.

A: Number of carbon atoms = 1.0 x 10 12 atoms

Q: mol aqueous L A chemist must prepare 875. mL of 10.0 mM aqueous calcium sulfate (CaS0,) working…

A: On dilution, the concentration of solution decreases but the number of moles remain constant. Write…

Q: A chemist must dilute 73.5 mL of 3.19 M aqueous zinc nitrate (Zn . She'll do this by adding…

A: (Before dilution) Initial volume of aqueous zinc nitrate Zn(NO3)2 solution = V1 = 73.5 mL  (1mL =…

Q: A chemistry student needs 45.0 mL of diethmylamine for an experiment. By consulting  the CRC…

A: Given,Volume of diethylamine = 45.0 mL = 45.0 cm3         (1mL = 1cm3)Density of diethylamine =…

Q: A chemist must dilute 28.6 mL of 801. mM aqueous aluminum sulfate (Al₂(SO4)3) solution until the…

A:

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

A:

Q: In a 1.196E2 g sample of iron(III) oxide, how many grams of iron are present

A:

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

A: The balanced chemical reaction between hydrochloric acid and sodium hydroxide is shown as,

Q: Liquid hexane (CH,(CH,) CH, will react with gaseous oxygen (0,) to produce gaseous carbon dioxide…

A: The complete combustion reaction of hexane + O2 is 2C6H14 + 19O2 --------> 12CO2 + 14H2O

Q: chemist adds 0.24 L of a 0.0327 g/L magnesium fluoride (MgF2) solution to a flask. Calculate the…

A: Concentration in g/L is equal to the weight of dissolved solute divide by volume of solution  given…

Q: Liquid octane (CH₂(CH₂) CH3) will react with gaseous oxygen (0₂) to produce gaseous carbon dioxide…

A: Liquid octane will react with gaseous oxygen to give gaseous carbon dioxide and gaseous water. The…

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 chemist must dilute 15.5 mL of 441. mM aqueous potassium permanganate (KMnO4) solution until the…

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: Chemistry

A: According to significant figure rule the number have least significant digit known as limiting term.…

Q: A chemist prepares a solution of copper(II) fluoride CuF2 by measuring out 0.0312g of copper(II)…

A: Given that : A chemist prepares a solution of copper(II) fluoride CuF2 by measuring out 0.0312g of…

Q: The volume of a metal bar can be determined by immersing it in water in a graduated cylinder and…

A:

Q: A chemist must prepare 575.mL of 1.00M aqueous sodium carbonate Na2CO3  working solution. She'll do…

A: When a concentrated solution (stock solution) of concentration C1 and volume V1 is diluted by adding…

Q: A student reported the mass of ten glass beads as 2.507 ± 0.015 g. What should the student report as…

A:

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

A:

Q: A chemist prepares a solution of nickel(II) chloride (NICI,) by measuring out 1.2x 10 jumol of…

A: Moles of NiCl2=1.2×102 μmol Volume=250 mL

Q: A chemist prepares solution of nickel(II) chloride (NiC1₂) by weighing out 202.7 g of nickel(II)…

A: Given: mass = 202.7 g

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

A:

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.