An element x is found to have a mass number of 31 and atomic number of 17. idenrify the group and the period to which it belongs?

How many moles are in 2.12g Cr2O3

What fiber is used in fiber-optic cabling to protect the inner core and prevent the cable from stretching?

What is Delta. Gsystem for the system that is described by the following data? Delta. Hsystem = - 345 kJ, T = 293 K, Delta. Ssystem = 465 J/K Delta. Gsystem = Delta. Hsystem - TDelta. Ssystem - 481 kJ - 209 kJ 413 kJ 135,900 kJ

Which observation would best support that the bond present was a covalent bond?

Describe the three main sub? atomic particles. Include mass (with units), charge and location for each.

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers

How many molecules are in. 25 mole of O2

A flexible container is filled with 960.0 liters of air at 38 degrees Celsius. If pressure in the container does not change, at what temperature will the container have at a volume of 350.0 liters?