Which of these is a covalent bond

Why then is a diamond extremely hard and sparkly and Graphite is soft and gray and dull?

O identify a liquid substance, a student determined its density. using a graduated cylinder, she measured out a 45-ml sample of the substance. she then measured the mass of the sample, finding that it weighed 38.5 g.

Why are very high temperatures and pressures required for fusion to occur? to generate the neutrons that are needed to break the nuclei to overcome the repulsion between the protons in the nuclei that join to maintain the proper conditions to keep

The table below shows the set of traits in four different beetle populations. Traits in Population Population Traits 1 Brown-colored beetles, pesticide-resistant gene present 2 Green-colored beetles, pesticide-resistant gene absent 3 Green and

What is the molar mass off a substance?

At a certain temperature this reaction follows second-order kinetics with a rate constant of 14.1 M-1s-1 : 2SO3g - -> 2SO2g + O2g Suppose a vessel contains SO3 at a concentration of 1.44M. Calculate the concentration of SO3 in the vessel 0.

A fusion reaction takes places between carbon and another element. Neutrons are realeased, and a different element is formed. The different element is?

What is the molarity of a solution prepared by dissolving 1.56 g of gaseous hcl (molar mass = 36.5 g into enough water to make 26.8 ml of solution?

Elementary row operations on an augmented matrix never change the the solution set of the associated linear system. True or False?

Element A has an electronegativity of 2.20. Element B has an electronegativity of 3.44. The bond of molecule AB is then best described as a: