Spreading created a?

What is the Lewis structure of Ch3Ch2NH3+?

An exothermic reaction has a positive enthalpy (heat) of reaction. (T/F)

Something used to represent a complex idea or process in science is a 1 program 2 microscope 3 hypothesis 4 model

A 2.17 gm sample barium reacted completely with water what is the equation for the reaction how many milliliters of dry H2 evoled at 21degree celcius and 748mm of Hg?

When do elements absorb energy and enter an excited state?

The what of a compound denotes the ratio of ions in the compound

All of the Gathered in an investigation must be recorded. (Fill in the blank)

What mechanical waves needs a medium to travel through? A. all mechanical waves need a medium to travel through B. surface waves only C. transverse and longitudinal waves only D. longitudinal and surface waves only

Which of the following statements correctly describes how Moseley's research affected the development of the periodic table? Moseley's research led to the reorganization of the elements based on their atomic mass instead of their physical appearance.

A minerals luster is produced by its ability to transmit light. Opaque minerals always have a metallic luster because they do not transmit any light. True False