The shattered glass case at the scene of a jewelry store robbery was determined to be made of potash borosilicate glass, which has a density of 2.162.16 g/mL. A 4.2124.212 g glass fragment was recovered from a suspect's clothing. When the fragment was placed into a graduated cylinder filled with water, 1.841.84 mL of the water was displaced. Calculate the density of the glass fragment.

In the area of nano-chemistry, particles defined as nanoparticles range in size from 1-2500 nm.  1 nm is equivalent to 1 × 10–9 m. If the size of the particles that make up a particular material is 1.23 × 10–8 cm, what is this size in nanometers?

During an accident, the air bag inflates due to the decomposition reaction of sodium azide (NaN3).  When heated, solid sodium azide reacts by itself to form solid sodium and nitrogen gas as products. What mass of sodium azide do you need to produce 200. L of nitrogen gas.  The density of nitrogen gas is 1.2056 g/L.

An elderly patient is prescribed 60 mg flurbiprofen to manage pain from rheumatoid arthritis. The smallest weighable quantity of the compounding pharmacy's scale is 210 mg. Using the aliquot method, what is the smallest total weight of the diluentthat you could add to the mixture?

The concentration of carbon monoxide (CO), a common air pollutant, is found in a room to be 5.7 x 10-3 mg/cm3. How many grams of CO are present in the room if the room's dimensions measure 3.5m x 3.0m x 3.2m?

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: 8.200 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 45.74 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 24.09 ml. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. ml

The density of methanol at 20.0 oC is 0.791 g/mL.  What is the mass, in grams, of a 280. mL sample?

In the opening scene of the movie Raiders of the Lost Ark, Indiana Jones tries to remove a gold idol from a booby-trapped pedestal. He replaces a gold (D = 19.32 g/cm²³) idol of dimensions 5.0 inches by 5.0 inches by 5.0 inches with a bag of sand of approximately double the volume with sand (D = 3.65 g/cm³). Is the bag of sand really equal to the gold idol or will Dr. Jones set off the trap? Explain your answer and include a mathematical explanation. ML Cm3

The shattered glass case at the scene of a jewelry store robbery was determined to be made of potash borosilicate glass, which has a density of 2.162g/mL. A 4.034g glass fragment was recovered from a suspect's clothing. When the fragment was placed into a graduated cylinder filled with water, 1.63mL of the water was displaced. Calculate the density of the glass fragment.

When a mixture of aluminum powder and iron(III) oxide is ignited, it produces molten iron and aluminum oxide. In an experiment, 5.40 g aluminum was mixed with 18.50 g iron(III) oxide. At the end of the reaction, the mixture contained 11.17 g iron, 10.20 g aluminum oxide, and an undetermined amount of unreacted iron(III) oxide. No aluminum was left. What is the mass of the unreacted iron(III) oxide? A)7.33 g B)8.30 g C)2.53 g D)4.80 g E)It is impossible to have those amounts at the end of the reaction.