From Questions to Solutions

The average class size this semester in the business school of a particular university is 39.4 students, with a standard deviation of 12.0 students. What is the z-score for a

A park ranger is watching a bear from the top of a 14 m tower. If the angle of depression to the bear is 62°, what is the distance from

A 2.75 molar aqueous solution of glucose has a density of 1.17 g/mL. What is the mass percentage (% m/m) of glucose in this solution? Glucose has a molar mass

You find a male skeleton with a humerus that measures 35.9 cm. How tall would this person have been in meters? \[ H = \text{humerus length} \times 2.97 + 73.57

Chan is in a running club and needs to run at least 500 miles in a year to earn the gold level of achievement. He is presently at 220 miles.

2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g) If 39.3 g of As reacts with excess NaOH at STP, what volume of H2

Round 35.9 to the nearest tenth.

Solve for \( k \). \[ \frac{k}{6.3} + 99.8 = 55.9 \] The solution is \( k = \)

Make the following conversions: a) 32 degrees Celsius to Fahrenheit b) -8.6 degrees Fahrenheit to Celsius c) 273 degrees Celsius to Kelvin d) 100 Kelvin to degrees Fahrenheit

Randy has 53 inches of ribbon that he cuts into 8 pieces of equal length. What is the length of each piece of ribbon, in inches? Use paper to show

The orbit of Eris has a maximum distance of 97.7 AU from the sun. If the albedo is 0.8, what is the average temperature when it is farthest from the

An energy of 24.6eV is required to remove one of that electrons from a neutal helium atom. The enegy (in eV)required to remove both the electrons from a netural helium

A calibration curve gives a slope of 35.9 M⁻¹. If the path length equals 1.8 cm, calculate the molar absorptivity (\(\varepsilon\)) in M⁻¹ cm⁻¹.

Two lamps, one rated at 100 W at 220 V and the other at 60 W at 220 V, are connected in parallel to a 220 V supply. What is

What quantity of heat is required to convert 25.0 g of ethanol (C₂H₅OH) at 23.0°C to a vapor at 78.3°C (its boiling point)? (Heat capacity of ethanol = 2.46 J/g°C;