In chemistry and physics, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, "matter" generally includes atoms and anything made up of them, and any particles and objects that act as if they have both rest mass and volume.
However it does not include massless particles such as photons, or other energy phenomena or waves such as light or sound. Matter exists in various states known as phases that are defined by various physical properties, such as state of matter, phase, shape, and density.
The Standard Model of particle physics and the general theory of relativity describe fundamental particles and the fundamental forces acting between them that control the structure and dynamics of matter. Click 'Join' if it's correct. Helen O. Chemistry 2 months, 2 weeks ago. View Full Video Already have an account? Vinnu M. Section 1 Conduction in Solids. Discussion You must be signed in to discuss. Video Transcript Okay, Little solve the problem.
Upgrade today to get a personal Numerade Expert Educator answer! Ask unlimited questions. Test yourself. Join Study Groups. Create your own study plan. Join live cram sessions. Live student success coach. Top Chemistry Educators Theodore D. Carleton College. Nadia L.
Rice University. Morgan S. University of Kentucky. Karli S. Numerade Educator. Chemistry Bootcamp Lectures Intro To Chem - Introduction Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties.
Classification and Properties of Matter In chemistry and physics, matter is any substance that has mass and takes up space by having volume. Recommended Videos Zinc Zn is used to form …. Calculate each of the foll…. Share Question Copy Link. Need the answer? Create an account to get free access. Sign Up Free. Log in to watch this video The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction.
These relative weights computed from the chemical equation are sometimes called equation weights. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance.
The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. We use the most common isotopes. This is how to calculate molar mass average molecular weight , which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes.
0コメント