Name the element which lies in group IA and 3rd period. What is the valency of it and why?

Why do people prefer LED lighting?

The element nitrogen has an atomic weight of 14.0 and consists of two stable isotopes nitrogen-14 and nitrogen-15. The isotope nitrogen-14 has a mass of 14.0 amu and a percent natural abundance of 99.6 %.

Which substance has Hf defined as 0 kj/mol? A. H2O (s) B. Ne (I) C. F2 (g) D. Co2 (g)

Calculate ΔG o for the following reaction at 25°C: 3Mg (s) + 2Al3 + (aq) ⇌ 3Mg2 + (aq) + 2Al (s) Enter your answer in scientific notation. * 10 kJ / mol

Changes in pressure can have a large effect on equilibrium systems containing gaseous components. 1. changing the concentration of gaseous components 2.

A marshmallow has an initial volume of 0.084 L at standard pressure (1.0 atm). If the marshmallow is placed in a vacuum chamber and the final volume is 0.785L, what is the pressure inside the chamber?

Can you think of another example of energy doing work fill out the table below with your idea

Write the net ionic equation for the reaction between agno3 (aq) and na2so4 (aq). be sure to include states of matter in your answer.

Witch compound has an element ratio of 2:1

Consider the total ionic equation below. 2 upper N upper H subscript 4 superscript plus, plus 2 upper O upper H superscript minus, plus 2 upper H superscript plus, plus upper S upper O subscript 4 superscript 2 minus right arrow 2 upper N upper H