Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons? 

Decay of lutetium-167 by electron capture yields 

Give the number of lone pairs around the central atom and the geometry of the ion IBr2–.

What is the density of copper if 11.8 cm3 of copper has a mass of 105.2 g? 

What is the density of a salt solution if 75.0 mL of the solution has a mass of 32.0 g? 

The average distance from Earth to the sun is 9.3 x 107 miles. How many kilometers is this? 

Convert 2.340 x 10-4 to decimal format. 

Which of the following is true of a mixture? 

Which of the following is true of a compound? 

A special flask used in the determination of densities, called a pycnometer, has a mass of 16.3179 g when empty, and it has a mass of 48.0250 g when filled with water at 20.0°C. When this same pycnometer is filled with ethyl alcohol at 20.0°C, it is found to have a mass of 41.3934 g. Find the density of ethyl alcohol at 20.0°C. (Given: at 20.0°C, the density of water is 0.9982 g/mL)