What is the total number of electron pairs that are shared between the two carbon atoms in a molecule of ethyne?

(1) 1 (3) 3

(2) 2 (4) 4

What are the similarities and differences between the bohr model of the atom and the quantum mechanical model of the atom?

Which of these best describes why a metal has the specific physical property of malleability? A) The metal atoms are loosely packed together. B) The positive cations are attracted to the negative anions.

Chose the molecular formula that represents an organic molecule. A. H 2O B. Cu 2O C. NH 2 D. C 6H 12O 6

5. What happens to the mass when you change the volume? It decreases

If nitrogen-13 has a half life of 2.5 years, how much remains from a 100g sample after 7.5 years

What is the octet rule and how does it explain the formation of ionic compounds?

Can somebody explain step by step how to solve decomposition reactions?

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

What do chemists use to describe a chemical reaction

When you drop a sugar cube in a glass of water, at first the water doesn't taste sweet. Later, it tastes very sweet. Eventually, the water will taste equally sweet throughout. What term explains molecule movement to maintain a balance?