Results for "molecular mass"

Relative atomic mass & Relative molecular mass

LC CHEMISTRY- EXPERIMENT: TO MEASURE THE RELATIVE MOLECULAR MASS OF A VOLATILE LIQUIDLC CHEMISTRY- EXPERIMENT: TO MEASURE THE RELATIVE MOLECULAR MASS OF A VOLATILE LIQUID

Chemistry: Conservation of Mass, Molecular Mass, The Mole and Molar Mass

Molecular Mass Spectrometry

To measure the relative molecular mass of a volatile liquid (using a conical flask)

molecular mass of common elements

chapters 11 & 20 - atomic and molecular mass spectrometry

Experiment to measure the relative molecular mass of a volatile liquid using a conical flask

**Properties of Matter** - **Physical vs Chemical Properties** - *Physical Properties:* Can be observed without changing the substance (e.g., color, density, melting point, boiling point) - *Chemical Properties:* Describe a substance’s ability to undergo chemical changes (e.g., flammability, reactivity with acid) - **Examples of Each** - Physical: Ice melting, water boiling, density, solubility - Chemical: Rusting iron, burning wood, tarnishing silver - **Intensive vs Extensive Properties** - *Intensive:* Do not depend on the amount of matter (e.g., density, boiling point, color) - *Extensive:* Depend on the amount of matter (e.g., mass, volume, length) --- **Density** - **Definition, Units, and Formula** - Density (ρ) = Mass (m) / Volume (V) - Units: g/cm³ (solids), g/mL (liquids), kg/m³ (gases) - **Comparison of Densities** - Solids: Generally highest density - Liquids: Lower density than solids but higher than gases - Gases: Lowest density - **Solid: Regular vs Irregular Shape** - *Regular Shape:* Use geometric formulas to find volume - *Irregular Shape:* Use water displacement method - **Factors Affecting Density** - Temperature (increase decreases density for most substances) - Pressure (affects gases significantly) - Composition (different materials have different densities) --- **Elements, Compounds, and Mixtures** - **Matter: Definition and Examples** - Anything that has mass and takes up space (e.g., air, water, rocks) - **Pure vs Impure Matter** - *Pure:* Elements and compounds (e.g., oxygen, water) - *Impure:* Mixtures (e.g., saltwater, air) - **Atom vs Element** - *Atom:* Smallest unit of an element - *Element:* Substance made of one type of atom - **Compounds vs Mixtures** - *Compounds:* Chemically bonded elements (e.g., H2O, CO2) - *Mixtures:* Physically combined substances (e.g., salad, air) - **Types of Mixtures** - Homogeneous (solutions, uniform throughout) - Heterogeneous (distinct parts, not uniform) - **Examples of Mixtures** - Homogeneous: Saltwater, air - Heterogeneous: Salad, granite --- **Solubility** - **Solutions** - *Parts:* Solute (dissolved substance) + Solvent (dissolving substance) - *Examples:* Saltwater (solute: salt, solvent: water) - **Effect of Temperature and Pressure** - Higher temperature increases solubility of solids in liquids - Higher pressure increases solubility of gases in liquids - **Gases vs Liquids** - Gases dissolve better in cold liquids under high pressure - Liquids dissolve better at higher temperatures - **Gaseous, Liquid, and Solid Solutions** - Gaseous: Air (oxygen in nitrogen) - Liquid: Saltwater (NaCl in H2O) - Solid: Alloys (brass, steel) - **Concentrations** - Unsaturated: Can dissolve more solute - Saturated: Maximum solute dissolved - Supersaturated: Holds more than normally possible - **Solubility Curve** - Shows solubility vs temperature - Higher points indicate higher solubility --- **The Mole** - **Avogadro’s Number** - 6.022 x 10^23 particles per mole - **Molar Mass** - Mass of one mole of a substance (g/mol) - **Particle, Mass, and Mole Calculations** - Particle calculations: Using Avogadro’s number - Mass calculations: Converting between grams and moles - Mole calculations: Determining amount of substance - **Moles at STP (Standard Temperature and Pressure)** - 1 mole of gas = 22.4 L at STP - **Atomic Mass Units (AMU)** - Unit for atomic/molecular mass --- **Labs** - **Density Lab** - Measure mass and volume, calculate density - Compare densities of different materials - **Elements, Compounds, and Mixtures Lab** - Classify substances based on their properties - **Mystery Powder Lab** - Identify unknown substances using solubility and reactions - **Cornstarch Lab** - Explore properties of non-Newtonian fluids This guide covers essential concepts in matter, density, solubility, and the mole, along with relevant lab activities

Chemistry molecular mass

3.1.2.1 Relative atomic mass and relative molecular mass

relative atomic mass and relative molecular mass

RAM, molecular mass, Avagadros number, moles

Molecular Mass, Moles, and Molarity

12. Molecular Mass

General Science (Atomic Structure/Atomic and Molecular Masses)

General Chemistry - Lesson 8: Molar Mass, Formula Mass, Molecular Mass

Molecular Mass Chem Test

3.1.2.1 relative atomic + molecular mass

Dependant/ independent variables Independent- The variable being manipulated Dependant- The observed result of the independent variable being manipulated 3 Domains Prokaryotes, Eukaryotes, Archae 3 Types of Relationships Commensalism Parasitism Mutualism Scientific Hypothesis an idea that proposes a tentative explanation about a phenomenon or a narrow set of phenomena observed in the natural world. Difference between Archea/ Bacteria Archaea consists of three RNA whereas bacteria consists of single RNA. Quantitative/ Qualitative data Quantitative data is numbers-based, countable, or measurable Qualitative data is interpretation-based, descriptive, and related to language. Homeostasis Balance of the body Controlled Experiment In a controlled experiment, all extraneous variables are held constant so that they can't influence the results. Difference between Hydrophobic/ Hydrophilic Any substance that repels water Any substance that has an affinity for water Protons/ electrons/ neutron Protons- a subatomic particle with a positive electric charge Electrons- a negatively charged subatomic particle that can be either bound to an atom or free (not bound). Neutron- an uncharged atomic particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus What a cation/ Anion Cations are ions that are positively charged. Anions are ions that are negatively charged. Isomers Chemical compounds that have identical chemical formulae but differ in properties and the arrangement of atoms in the molecule Picture of elements/ what's on valence electrons Valence electrons have negatively charged particles How many valence electrons are in shells 8 electrons What are examples of trace elements? zinc (Zn), copper (Cu), selenium (Se), chromium (Cr), cobalt (Co), iodine (I), manganese (Mn), and molybdenum (Mo). Different types of Bonds Covalent Bonds- one or more electrons shared between atoms Non-polar covalent: electrons are shared equally between nuclei Polar covalent- electrons shared equally between the nuclei Ionic Bonds- one or more electrons transformed from one to another Hydrogen Bonds- a weak bond between a partially positive hydrogen atom and a partially negative oxygen atom Cohesion/ Adhesion Cohesion- the attraction of molecules for other molecules of the same kind Adhesion- the sticking of molecules or surfaces to each other Radioactive Isotopes, Why are they used Radioisotopes are an essential part of medical diagnostic procedures. In combination with imaging devices that register the gamma rays emitted from within, they can be used for imaging to study the dynamic processes taking place in various parts of the body. Why is Water Important Water's role as a solvent helps cells transport and use substances like oxygen or nutrients. Properties of Water Water is polar Water is a solvent Water is less dense as a solid than a liquid What are reactions a process that converts one or more substances to another substance. .Why are trace elements important? function primarily as catalysts in enzyme systems What are Buffers Substances in the cells that help maintain a relatively stable pH What is the pH scale? a measure of how acidic/basic water is Find the molecular mass of something Atomic weight on the periodic table is equal to moles #/1m = x/ desired # moles Functional groups The shape of molecules directly affects their function Types of atoms, bonds A specific arrangement of atoms Difference between Hydraullisis/ Dehydration Dehydration- removes a water molecule from a new bond Hydrolysis- add a water molecule, breaking a bond Differentiate between Polymers/ Monomers A monomer is a molecule with low molecular weight that can combine with others of the same kind to form a chemical compound known as a polymer Different types of Proteins/ enzymes antibodies, contractile proteins, enzymes, hormonal proteins, structural proteins, storage proteins, and transport proteins Difference between plants and animals Plants are not mobile and animals are Cell membrane components Phospholipids, cholesterol, glycolipids, lipid bilayer, membrane proteins