From Questions to Solutions

The vapor pressure of ethanol is 100 mmHg at 34.9 ∘C. What is its vapor pressure at 65.0 ∘C? (ΔH_vap for ethanol is 39.3 kJ/mol.)

A random sample of 41 observations was selected from a normally distributed population. The sample mean was [tex]\bar{x} = 97.7[/tex], and the sample variance was [tex]s^2 = 35.3[/tex].

A ladder leans against a building, making a 70-degree angle of elevation with the ground. The top of the ladder reaches a point on the building that is 39 feet

A bulb rated at 220 V, 100 W is connected in series with another bulb rated at 220 V, 60 W. If the voltage across the combination is 220 V,

A price index was approximately 97.8 (base year 1992) at the beginning of 1991. If inflation continued at an average annual rate of 2.5%, what would the index be at

Mr. Morales traveled 1, 214 miles while on a business trip. What is this number rounded to the nearest ten? F. 1, 200 G. 1, 210 H. 1, 220 J.

\( A \$ 100 \) face-value discount bond with an interest rate of \( 2 \% \) has a price of \( \$ 97.6 \) \( \$ 101 \) \(

Two astronauts are at rest in outer space, one 19.7 m from the space shuttle and the other 39.4 m from the shuttle. Using a 121.0 W laser, the astronaut

Randy has 53 inches of ribbon that he cuts into 6 pieces of equal length. What is the equal length of each piece of ribbon in inches

Write a function rule for the table. 1 34 2 56 3 78 4 100 A. \( c = 220 + 12 \) B. \( c = 220 \) C.

What mass of SF\(_6\) (molar mass = 146.06 g/mol) can be found in a 15.0-L tank at STP? A. 218 g B. \(4.58 \times 10^{-3}\) g C. 97.7 g

Why is Siegfried able to comply with Miss Dooley's request?

Jane and Theo are learning about the mechanisms of homeostasis in their biology class. They decide to investigate how their bodies respond to various stimuli. They complete the following tests:

Edwin uses 4 rolls of green ribbon and 8 rolls of purple ribbon for a project. Each roll of green ribbon has a length of 90 feet, and each roll

Given the vectors in component form: [tex] \begin{array}{l} r = \langle 8, 4 \rangle \\ s = \langle -3, -4 \rangle \\ t = \langle -5, 1 \rangle \end{array} [/tex]