The density of a pure substance is its mass per unit volume. The density of hexane has been measured to be 655.. Calculate the mass of L 455. mL of hexane. The density of a pure substance is its mass per unit volume. The density of hexane has been measured to be 655 hexane. Calculate the mass of 455. mL of

A gasoline station in Manila, Philippines, charges 38.46 pesos per liter of unleaded gasoline at a time when one US. dollar (USD) buys 47.15 pesos (PHP). The car you are driving has a gas tank with a capacity of 14 U.S. gallons and gets 24 miles per gallon. (a) What is the cost of unleaded gasoline in Manila in USD per gallon? (b) How much would a tankful of unleaded gasoline for your car cost in USD? (c) Suppose that you have only PHP 1255 (a day's wage for an elementary school teacher) and the car's tank is almost empty. How many miles can you expect to drive if you spend all your money on gasoline?

The density (d) of a substance is an intensive property that is defined as the ratio of its mass (m) to its volume (V).density=massvolumed=mV Considering that mass and volume are both extensive properties, explain why their ratio, density, is intensive.

When a large or small number is written in standard scientific notation, the number is expressed as the product of anumberbetween 1 and 10, multiplied by the appropriatepowerof 10. For each of the following numbers, indicate what number between 1 and 10 would be appropriate when expressing the numbers in standard scientific notation. 9651 0.003521 93,241 0.000001002

On the planet Xgnu, the natives have 14 fingers. On the official Xgnuese temperature scale (CX), the boiling point of water (under an atmospheric pressure similar to earth’s) is 140 °X, whereas water freezes at 14 CX. Derive the relationship between °X and °C.

The active ingredient of aspirin tablets is acetylsalicylic acid, which, has a density of 1.4 g/cm3. In a lab class, a student used paper chromatography to isolate another common ingredient of headache remedies. The isolated sample had a mass of 0.384 g and a volume of 0.32 cm3. Given the data in the following table, what was the other ingredient in the headache remedy? Density Values for Potential Headache Remedies Compound Density (g/cm3) White table sugar 0.70 Caffeine 1.2 Acetylsalicylic acid 1.4 Sodium chloride 2.2

Distinguish precisely and in scientific terms the differences among items in each of the following groups. a Coefficient, exponent, exponential b Equivalency, conversion factor, quantity, value, unit c Analyze, identify, construct, check d Mass, weight e Unit, kilounit, centiunit, milliunit f Significant figures, uncertain digit g Uncertainty, exact number h The symbols = and i Fahrenheit, Celsius, kelvin j Direct proportionality, proportionality constant k Density, mass, volume

The mass of a beaker is 5.333 g. After 5.00 mL of a concentated hydrochloric acid solution is pipet Ted into the beaker, the combined mass of the beaker and the hydrochloric acid sample is 11.229 g. From the data, what is the measured density of the hydrochloric acid solution?

At 20oC 25.0 ml of concentrated nitric acid solution was found to have a mass of 32.503 g. What is the calculated density of this solution at 20oC? Show your calculation set-up and result using correct significant figures and proper units.              Volume of Nitric acid = 25.0 ml                  Mass of nitric acid = 32.503 g     Density = mass of substance                     Density= Mass of nitric acid                  volume of substance                                  volume of nitric acid                                   = 32.503g                                   25 .0mL                                    =  1.30g/mL  (3 sig figures)     Using the calculated density of the solution from above, what is the mass of 150 ml. of the solution? Again show your solution set-up with correct significant figures and units.

An experiment with a pycnometer resulted in the following data:  Mass of Pycnomter = 25.428 g Mass of Pycnometer filled with water = 44.021 grams Mass of Pycnometer filled with liquid X = 41.421 grams a) What is the specific gravity of liquid X?  b) If methanol (Specific Gravity = 0.790) was used rather than water in measuring the density of irregular objects, how would that affect the result? Why?