5/3if 87.5 percent of a sample of pure 131 i decays in 24 days, what is the half-life of 131 i?

Molarity prctice c. 10. c

A student visits the beach during a very hot day. She steps on the sand and jumps because it is so hot. What type of he transfer is demonstrated by the sand in this example

Which group on the periodic table would have zero electronegativity because they have a full octet? Inert or noble gases alkaline earth metals halogens

A welding torch produces a flame by burning acetylene fuel in the presence of oxygen the energy released from the acetylene fuel is then used to melt a metal which energy transformation happens during this process

As the atomic number of the metals of Group 1 increases, the ionic radius A. Increases B. Decreases C. Remains the same D. Cannot be determined

Convert 1.67 x10^24 atoms of carbon to moles of carbon

The knowledge of chemistry not important in one of the following? A, in agriculture B, in Geology C, in medicine D, none

Which is the balanced equation for: Al2O3 + Fe - Fe3O4 + AL

Why are lab apparatus made of ceramics

The volume of oxygen required for complete combustionof a mixture of 5 cm3 of ch4 and5 cm3 c2h4