From Questions to Solutions

Assume that between 1967 and 2015, the volume of UK exports of goods (in index number form, with 2013 = 100) grew from 13 to 97.8. (a) Calculate the average

the specific heat of liquid ethanol, C₂H₅OH(l) is 2.46j/g ⁰C and the heat of vaporization is 39.3 kj/mol the boiling point of ethanol is 78.3⁰C what amount of etnthalpy is

A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 14 subjects had a mean wake time of 101.0 minutes.

A sample of hydrogen gas is collected by water displacement at 20.0 degrees Celsius, with the atmospheric pressure at 99.8 kPa. What is the pressure of the dry hydrogen, if

What value of n makes the equation below true? \[ 4n = 220 \] A. 50 B. 55 C. 216 D. 220

From the year 1990 to 2017, the extreme poverty rate for the world's population declined from 35.9 percent to 9.3 percent. Is this statement true or false?1. True 2.False

Find the area of the triangle given: - \( C = 133.6^\circ \) - \( a = 46.1 \, \text{ft} \) - \( b = 36.6 \, \text{ft} \)

A pharmaceutical company claims their new diabetes medication results in less variance in a patient's glucose level than if the patient were on no medication at all. An endocrinologist wishes

How many milliliters of liquid does the smaller graduated cylinder contain? (3 sig fig) A. 100.2 mL B. 120.5 mL C. 150.8 mL D. 110.3 mL

The table shows speedometer readings at 10-second intervals during a 1-minute period for a car racing at the Daytona International Speedway in Florida. a) Estimate the distance the race car

Name the two temperature scales which have the same degree size. A. Fahrenheit and Kelvin. B. Celsius and Kelvin. C. Celsius and Fahrenheit. D. Rankine and Fahrenheit.

A sample of oxygen was collected in a tube over water. In the tube, there is a mixture of oxygen gas and gaseous water (steam). The total pressure of the

A school has the following rules for its grading system: A. Below 25 - F B. 25 to 45 - E C. 46 to 50 - D D. 51 to

A 25.0 mL sample of an [tex]$\text{H}_2\text{SO}_4$[/tex] solution requires 38.2 mL of a 0.163 M [tex]$\text{NaOH}$[/tex] solution for complete neutralization. 1. Write the balanced chemical reaction. 2. What is the

The number of miles driven by Dylan varies directly with the number of gallons he uses. \[ \begin{tabular}{|c|c|} \hline Number of Gallons Used & Number of Miles Driven \\ \hline