A radioactive isotope has a half-life of 10 hours. If you start with 80.0 g, how much will remain after 30 hours?

Which of the following compounds would have the greatest electrical conductivity when dissolved in water?From students DB posts

Solve:     .  If the equation is an identity or a contradiction; so indicate.

Find the volume of a rectangular solid with dimensions 9.1 feet, 2.4 feet, and 7.8 feet.  Round the answer to the nearest hundredth.

Balance the following equations: [BLANK-1] Al(s) +  [BLANK-2] HCl(aq) —-> [BLANK-3] AlCl3 (s)+ [BLANK-4] H2 (g) [BLANK-5] H2SO4 (aq) + [BLANK-6] Fe(NO3)3  (aq) —> [BLANK-7] Fe2(SO4)3 (s) + [BLANK-8] HNO3 (aq)

After the Japanese launched a new invasion in parts of China in 1937, FDR classified his approach to the Japanese as this, and also justified it as a way to send military aid to the Chinese

Because of fears over the proximity of Cuba to the US and their fall into communism, Eisenhower and the CIA put together a plan to overthrow the new regime by attacking this location, which got pushed to JFK when he became president in 1961

Cuba gained its independence in 1902, after the US took possession of it from this country in 1898, and pushed for Cubans to form their own government

The US and Allied embargo on this resource after the Japanese attacked French Indochina was the main provocation for Japan’s plans to make war against the US

This leader of Russia sought to modernize his nation in terms of military, fashion, and culture, but also became an absolute ruler, establishing a new style of Tsarist regime as an autocracy