How many atoms are in 1.4 mol of phosphorus trifluoride (PF3) ?

a. 8.4 * 1024

b. 3.4 * 1023

c. 8.4 * 1023

d. 3.4 * 1024

Use the periodic table entry below to answer the following question. What is the atomic mass of the element cobalt (Co) ?

The chemical reaction between iron (Fe) and oxygen (O) results in the loss of electrons from iron. This reaction is an example of?

Mg is a member of which family? a) noble gases b) halogensc) alkaline earth metals d) alkali metalse) none of the above

Which is released when energy is transformed from one energy type to another? A. chemicals B. heat C. light D. radiation

What is the Protons?

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong

In which orbital does an electron in a bromine atom experience the smallest?