Given below are densities in g/mL of some common substances. Aluminum = 2.70 Iron = 7.86 Copper = 8.92 Lead = 11.3 Gold = 19.3 QUESTION: In an old trunk, you find a piece of metal. In the lab, you find that it has a mass of 217 g and a volume of 19.2 cc. What is the identity of the metal you found? Show detailed solution to support your answer.

A 25.90 g piece of metal has a density of 0.987 g/mL. A 50 mL graduated cylinder contains 10.00 mL of water. What is the final volume after the metal is added to the graduated cylinder? Show your solution.

In this experiment you will use a 3.0 x 10–5 M stock solution of red dye.  3.0 x 10–5 M means that the solution contains 3.0 x 10–5 moles of dye in one liter of solution.  How many moles of dye molecules are in 2.0 mL of the 3.0 x 10–5 M stock solution?Express your answer to 2 significant figures

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 1/3 B A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 7.2 g . She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 63.517 g. . She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 91.0 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. g-mL G

A chemistry student weighs out 0.113 g of acetic acid (HCH3CO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1100 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. 0 mL $ ? x10 X

A lab assistant needs to neutralize a 3.1 M solution of HCI. If there are 350 mL of solution, what volume, in Liters, of a 1.8 M NAOH solution would have to be used? (Hint: You will need to write out the equation and balance it first.) Be sure to report your answer to the correct number of significant figures. Do not report the units (L) in your answer.

A chemist needs 16.94 mL of 1.067 M HCl. What volume in mL of 3.971 M HCl must be diluted in water to form this solution? Please report your answer in mL  to 3 decimal

A chemist adds 305.0 mL of a 0.41 M barium chloride (BaCl₂) solution to a reaction flask. Calculate the millimoles of barium chloride the chemist has added to the flask. Round your answer to 2 significant digits. 1.25 x 10 mmol [NN] X 5 ? Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility Ad DII F11 F12 F10 FO FB F7 esc ! 1 Explanation 2 Check 39: F2 14/ # 3 80 F3 $ 4 000 F4 R % 5 ܐ FS T ^ 6 F6 Y & 7 U * 00 8 ہ ۔ 9 ) 0 0 P + 11 T D olo Ar

A solution was created by dissolving 7.399 g of calcium chloride in 54.2 mL of water (d = 1.00 g/mL). What is the boiling point of this new solution? The ko for water is 0.52°C/m. The boiling point of pure water is 100.0°C. Round your answer to 2 decimal places.

A chemistry student weighs out 0.0176 g of formic acid (HCHO2)into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1300 M(molarity) NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.