This lesson covers solved numerical problems on molarity, molality, mole fraction, and percentage concentrations to help you clearly understand solution concentration concepts in chemistry.

Although not a household scientific name like Albert Einstein or Isaac Newton, Indian mathematician Srinivasa Ramanujan—who tragically died in 1920 at the age of 32—was one of the greatest minds in ...

Alessandra Malito is a retirement reporter based in New York. She holds the Chartered Retirement Planning Counselor™ and Chartered Financial Consultant® designations. You can follow her on Twitter ...

A farmer is watering an alfalfa field 24 hours a day using a 3-phase 100-hp electric motor and adjustable speed drive (ASD). The farmer checks on his field to find the water not flowing and the pump ...

Calculating the cost of goods sold gives a business insight into its performance and helps calculate profit. Many, or all, of the products featured on this page are from our advertising partners who ...

Since its inception, in 2000, Gavi, the Vaccine Alliance, which works with local governments to bring vaccines to low-income countries, has helped administer 1.9 billion vaccines and reached a billion ...

The state and local tax deduction, a write-off that primarily benefits higher-income Americans living in high-tax areas, was one of the most disputed provisions of Trump’s tax-and-spend bill. The law ...

Who was the first person to calculate pi? The first person to realise that, hang on, when you divide the circumference of a circle by its diameter, you always seem to get the same number, namely ...

After years of paying into the Social Security system, many seniors are surprised to learn that the benefits they receive after retirement may be subject to federal income tax. This is generally ...

The liquidation value of a company represents the total value of its assets if the company were to go out of business and liquidate its assets to pay off debts. For investors, understanding a ...