Counting Atoms

Counting Atoms

Counting Atoms Bellringer 10/25 1. What was the purpose of the lab we did yesterday? 2. List 2 things you observed happening. 3. Define the Law of Conservation of Mass. How do we

count atoms? Remember! Subscripts are the little numbers that tell us how many atoms there are. EX- H2O Coefficients are regular sized numbers that tell us how many molecules there are. EX- 3NO

How do we count atoms? If there is a chemical compound with only subscripts then its whatever the subscripts tell you! CH4 1 atom of Carbon 4 atoms of Hydrogen If there are both subscripts and

coefficients multiply all the subscripts by the coefficient How do we count atoms? Here are 5 easy steps 1. Write the chemical formula 2. List all the atoms 3. Count the number of atoms of

each element in 1 molecule 4. Multiply the number of atoms of each by the coefficient 5. Make sure your answer makes sense Practice 4C6H12O6 (glucosesugar) C- 4 x 6= 24 H- 4 x 12= 48 O- 4 x 6= 24

Whats the total number of atoms in sugar? 24 + 48+ 24= 96 atoms! Practice 6C2H5OH C- 2 x 6= 12 H- 5 x 6= 30 O- 1 x 6= 6 H- 1 x 6= 6

But wait H appears twice! Thats okay, you want the TOTAL number of H so that means there are 30+6= 36

More Practice 5 Ca(OH)2 Ca- 5 x 1= 5 O- 5 x 2= 10 H- 5 x 2= 10 How many total atoms are in calcium hydroxide? There are 25 atoms total!

Recently Viewed Presentations

  • The Demand driven workforce system - Indiana

    The Demand driven workforce system - Indiana

    Skill UP INDIANA! is an innovative grant meant to supply sector based partnerships with the funds needed to promote and develop a stronger skilled workforce in Indiana. ... Demonstrates partners' commitment in working toward shared outcomes and continuous improvement. Innovation...
  • Cognitive biases: The thought mistakes we often make and how ...

    Cognitive biases: The thought mistakes we often make and how ...

    "Now they see the [Renault] Zoe, the [Nissan] Leaf, the Teslasetc and they think electric cars can be fun. They see Formula E and see the cars can be very powerful and go very fast. The idea that electric cars...
  • Hysteria in The Crucible

    Hysteria in The Crucible

    Irony Dramatic Irony: occurs when readers know more about a situation or a character in a story or play that the characters do * See scene when Elizabeth is questioned during the trial and asked why she released Abigail from...
  • PHY2048, Lecture 23  Wave Motion Chapter 14  Tuesday

    PHY2048, Lecture 23 Wave Motion Chapter 14 Tuesday

    Adding waves as vectors (phasors) described by amplitude and phase Interference - Standing Waves If two sinusoidal waves of the same amplitude and wavelength travel in opposite directions along a stretched string, their interference with each other produces a standing...
  • Snímek 1 - veskole.cz

    Snímek 1 - veskole.cz

    Výukový materiál zpracovaný v rámci projektu EU peníze školám ZŠ Grünwaldova, Č. Budějovice Mgr. Vilma Skřivánková Pořadové číslo projektu: CZ.1.07/1.4.00/21.1636
  • Psychology Sigmund Freud Sigmund Freud (1856-1939) -Austrian, doctor

    Psychology Sigmund Freud Sigmund Freud (1856-1939) -Austrian, doctor

    Sigmund Freud, the founder of psychoanalysis, compared the human mind to an iceberg. The tip above the water represents consciousness, and the vast region below the surface symbolizes the unconscious mind. Of Freud's three basic personality structures—id, ego, and superego—only...
  • Prevention 2019: MJ, Kratom, e-Cigarette Presentation

    Prevention 2019: MJ, Kratom, e-Cigarette Presentation

    The health effects and potentially harmful effects of doses of heated and aerosolized constituents of e-cigarette liquids, including solvents, flavorants, and toxicants, are not completely understood. E-cigarettes can also be used to deliver other drugs, including marijuana.
  • Viruses in Biotechnology - Institute of Food and Agricultural ...

    Viruses in Biotechnology - Institute of Food and Agricultural ...

    Viruses in Biotechnology Dr. James Maruniak pGenBac2.1 is a transfer vector for high level eukaryotic expression of recombinant proteins in insect cells. This vector is compatible with Invitrogen Bac-to-Bac Baculovirus Expression System. The gene of interest can be easily cloned...