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Wayne Breslyn
United States
Приєднався 4 чер 2008
Dr. B is chemist and learning scientist who enjoys creating videos to help students with chemistry and other science topics. He has taught science for over twenty years in the U.S. and internationally. He holds a Ph.D. in Curriculum & Instruction from the University of Maryland where he works on research projects investigating how people learn science.
To become a channel member:
ua-cam.com/channels/aUF73YX-uQTGwDB20I3n3g.htmljoin
Read his recent research article in the Royal Society of Chemistry’s Chem. Educ. Res. & Practice journal at pubs.rsc.org/en/content/articlehtml/2020/rp/c9rp00145j .
You can find more help with chemistry at www.Breslyn.org .
To become a channel member:
ua-cam.com/channels/aUF73YX-uQTGwDB20I3n3g.htmljoin
Read his recent research article in the Royal Society of Chemistry’s Chem. Educ. Res. & Practice journal at pubs.rsc.org/en/content/articlehtml/2020/rp/c9rp00145j .
You can find more help with chemistry at www.Breslyn.org .
How to Balance Zn + HNO3 = Zn(NO3)2 + NO2 + H2O
In this video we'll balance the equation Zn + HNO3 = Zn(NO3)2 + NO2 + H2O and provide the correct coefficients for each compound.
To balance Zn + HNO3 = Zn(NO3)2 + NO2 + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
To see the steps to balance as a redox, enter the equation into this calculator:
www.periodni.com/half-reaction_method.php
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for .
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
For a complete tutorial on balancing all types of chemical equations, watch my video:
• Balancing Equations in 5 Easy Steps: ua-cam.com/video/zmdxMlb88Fs/v-deo.html
• More Practice Balancing: ua-cam.com/video/Qci7hiBy7EQ/v-deo.html
For help with moles to grams conversions and more:
• More Moles to Grams Practice: ua-cam.com/video/aIv5nr8ZNyw/v-deo.html
• Molar Mass in Three Easy Steps: ua-cam.com/video/o3MMBO8WxjY/v-deo.html
• Understanding the Mole: ua-cam.com/video/DyLktMPTuHY/v-deo.html
• Moles - Gram Conversions: ua-cam.com/video/aIv5nr8ZNyw/v-deo.html
• How to Balance Chemical Equations: ua-cam.com/video/zmdxMlb88Fs/v-deo.html
• Mole Ratio: ua-cam.com/video/i71BMVlrMiw/v-deo.html
• Reaction Stoichiometry: ua-cam.com/video/rrTqOsZPpaU/v-deo.html
Drawing/writing done in InkScape (www.InkScape.org). Screen capture done with Camtasia Studio 4.0. Created on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).
To balance Zn + HNO3 = Zn(NO3)2 + NO2 + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
To see the steps to balance as a redox, enter the equation into this calculator:
www.periodni.com/half-reaction_method.php
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for .
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
For a complete tutorial on balancing all types of chemical equations, watch my video:
• Balancing Equations in 5 Easy Steps: ua-cam.com/video/zmdxMlb88Fs/v-deo.html
• More Practice Balancing: ua-cam.com/video/Qci7hiBy7EQ/v-deo.html
For help with moles to grams conversions and more:
• More Moles to Grams Practice: ua-cam.com/video/aIv5nr8ZNyw/v-deo.html
• Molar Mass in Three Easy Steps: ua-cam.com/video/o3MMBO8WxjY/v-deo.html
• Understanding the Mole: ua-cam.com/video/DyLktMPTuHY/v-deo.html
• Moles - Gram Conversions: ua-cam.com/video/aIv5nr8ZNyw/v-deo.html
• How to Balance Chemical Equations: ua-cam.com/video/zmdxMlb88Fs/v-deo.html
• Mole Ratio: ua-cam.com/video/i71BMVlrMiw/v-deo.html
• Reaction Stoichiometry: ua-cam.com/video/rrTqOsZPpaU/v-deo.html
Drawing/writing done in InkScape (www.InkScape.org). Screen capture done with Camtasia Studio 4.0. Created on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).
Переглядів: 328
Відео
Convert 1.75 L to mL (1.75 Liters to Milliliters)
Переглядів 317 годин тому
To convert 1.75 liters (L) to milliliters (mL), you can use the following steps. Note that the L will cancel out as you perform the conversion, leaving only mL: Conversion Factor: 1 liter (L) = 1000 milliliters (mL) Start with the quantity you want to convert (1.75 L) and set up a ratio where the original unit (L) is in the denominator and the target unit (mL) is in the numerator, using the con...
Write the Molecular, Structural, and Skeletal Formula for Butanol (Butan-1-ol)
Переглядів 357 годин тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for Butanol (also known as n-Butanol or Butan-1-ol). Starting with the molecular formula, C₄H₁₀O, we see the number of Carbon, Hydrogen, and Oxygen atoms, but it doesn't reveal their arrangement. However, this formula is essential for understanding the composition of butanol. Next, we'll draw the structural ...
Convert 4.0 L to mL (4 Liters to Milliliters)
Переглядів 21814 днів тому
To convert 4 liters (L) to milliliters (mL), you can use the following steps. Note that the L will cancel out as you perform the conversion, leaving only mL: Conversion Factor: 1 liter (L) = 1000 milliliters (mL) Start with the quantity you want to convert (4 L) and set up a ratio where the original unit (L) is in the denominator and the target unit (mL) is in the numerator, using the conversio...
Write the Molecular, Structural, and Skeletal Formula for Butanone (Methyl Ethyl Ketone)
Переглядів 11814 днів тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for butanone, also known as Butan-2-one or methyl ethyl ketone (MEK), which has the molecular formula CH₃COCH₂CH₃. Starting with the molecular formula, CH₃COCH₂CH₃, we see the number of Carbon, Hydrogen, and Oxygen atoms, as well as the presence of a carbonyl group (C=O), which is characteristic of ketones. ...
H2, N2, and NH3 : Comparing Boiling Points
Переглядів 1 тис.21 день тому
NH₃ has the highest boiling point because it experiences stronger hydrogen bonding compared to the weaker London dispersion forces in H₂ and N₂. Comparing N2 and H2, the greater molar mass of N2 means it will have a higher boiling point than H2. Here are the boiling points for each substance: H2 boils at -252.8C N2 boils at -195.8C NH3 boils at -33.1C Join this channel to get full access to Dr....
Write the Molecular, Structural, and Skeletal Formula for Propene (C₃H₆)
Переглядів 21321 день тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for Propene (C₃H₆). Starting with the molecular formula, C₃H₆, we see the number of Carbon and Hydrogen atoms, but it doesn't reveal their arrangement. However, this formula is crucial as it indicates that Propene is an unsaturated hydrocarbon, meaning it contains a carbon-carbon double bond. Next, we'll dra...
Write the Molecular, Structural, and Skeletal Formula for Butanol (C₄H₉OH)
Переглядів 12121 день тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for Butanol, also known as Butan-1-ol, which has the molecular formula C₄H₉OH. Starting with the molecular formula, C₄H₉OH, we see the number of Carbon, Hydrogen, and Oxygen atoms, as well as the presence of a hydroxyl group (OH), which is characteristic of alcohols. However, the molecular formula alone does...
Write the Molecular, Structural, and Skeletal Formula for 2-Methylpentane
Переглядів 12421 день тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for 2-methylpentane (C₆H₁₄). Starting with the molecular formula, C₆H₁₄, we see the number of Carbon and Hydrogen atoms, but it doesn't reveal their arrangement. However, this formula is crucial as it indicates that 2-methylpentane is an isomer of hexane, meaning it shares the same molecular formula but has ...
Write the Molecular, Structural, and Skeletal Formula for Dimethylamine (C₂H₇N)
Переглядів 10221 день тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for Dimethylamine (C₂H₇N). Starting with the molecular formula, C₂H₇N, we see the number of Carbon, Hydrogen, and Nitrogen atoms, but it doesn't reveal their arrangement. However, this formula, along with the name "Dimethylamine," suggests it is a secondary amine, meaning the nitrogen atom is connected to tw...
Molecular Formula vs Structural Formula vs Skeletal Formula
Переглядів 1,5 тис.Місяць тому
This video provides a detailed overview of three primary types of chemical formulas: molecular formulas, structural formulas, and skeletal formulas. More organic chemistry help at www.Breslyn.org ! We'll start with molecular formulas, which simply list the types and numbers of atoms in a molecule, offering no structural insights. Then we’ll look at structural formulas, which build on molecular ...
Convert 5.0 L to mL (5 Liters to Milliliters)
Переглядів 289Місяць тому
To convert 5 liters (L) to milliliters (mL), you can use the following steps. Note that the L will cancel out as you perform the conversion, leaving only mL: Conversion Factor: 1 liter (L) = 1000 milliliters (mL) Start with the quantity you want to convert (5 L) and set up a ratio where the original unit (L) is in the denominator and the target unit (mL) is in the numerator, using the conversio...
Convert 1.25 L to mL (1.25 Liters to Milliliters)
Переглядів 196Місяць тому
To convert 1.25 liters (L) to milliliters (mL), you can use the following steps. Note that the L will cancel out as you perform the conversion, leaving only mL: Conversion Factor: 1 liter (L) = 1000 milliliters (mL) Start with the quantity you want to convert (1.25 L) and set up a ratio where the original unit (L) is in the denominator and the target unit (mL) is in the numerator, using the con...
Convert 650mmHg to atm.
Переглядів 214Місяць тому
To convert 650 millimeters of mercury (mmHg) to atmospheres (atm), you can use the conversion factor: 1 atmosphere (atm) is equal to 760 mmHg. The conversion formula is: Pressure in atmospheres (atm) = Pressure in millimeters of mercury (mmHg) / 760 For your specific example: Pressure in atmospheres = 650 mmHg / 760 Calculating this: Pressure in atmospheres is approximately 0.855 atm So, 650 mm...
Write the Molecular, Structural, and Skeletal Formula for Cyclohexane (C₆H₁₂)
Переглядів 317Місяць тому
In this video, we'll learn how to draw the molecular, structural, and skeletal formulas for cyclohexane (C₆H₁₂). Starting with the molecular formula, C₆H₁₂, we see the number of Carbon and Hydrogen atoms, but it doesn't reveal their arrangement. However, this formula is important as it indicates a cyclic structure due to the reduced number of hydrogens compared to a straight-chain alkane. Next,...
Write the Molecular, Structural, and Skeletal Formula for Butane (C₄H₁₀)
Переглядів 191Місяць тому
Write the Molecular, Structural, and Skeletal Formula for Butane (C₄H₁₀)
Predict the Products of the Reaction for C6H12O6 + O2 (Glucose + Oxygen Gas)
Переглядів 411Місяць тому
Predict the Products of the Reaction for C6H12O6 O2 (Glucose Oxygen Gas)
Ideal Gas Law (PV=nRT) Practice Problem
Переглядів 198Місяць тому
Ideal Gas Law (PV=nRT) Practice Problem
Convert 0.25 L to mL (0.25 Liters to Milliliters)
Переглядів 276Місяць тому
Convert 0.25 L to mL (0.25 Liters to Milliliters)
Convert 0.75 L to mL (0.75 Liters to Milliliters)
Переглядів 277Місяць тому
Convert 0.75 L to mL (0.75 Liters to Milliliters)
Solving the Ideal Gas Law for Temperatures (T)
Переглядів 237Місяць тому
Solving the Ideal Gas Law for Temperatures (T)
Convert 0.1 L to mL (0.1 Liters to Milliliters)pen_spark
Переглядів 247Місяць тому
Convert 0.1 L to mL (0.1 Liters to Milliliters)pen_spark
Decompostion of Metal Oxides: Predicting Products
Переглядів 233Місяць тому
Decompostion of Metal Oxides: Predicting Products
How to Balance Ca(HCO3)2 + Ca(OH)2 = CaCO3 + H2O ()
Переглядів 1,2 тис.Місяць тому
How to Balance Ca(HCO3)2 Ca(OH)2 = CaCO3 H2O ()
Atoms, Ions, and Molecules: Differences and Examples
Переглядів 494Місяць тому
Atoms, Ions, and Molecules: Differences and Examples
Thamk u
Nivlce tnx sir
😭🙏tyyy
🏤🏛🏚🧱🏜🏖🏚🧱🏢🏚🏖🏛🧱🏦🏤🏡
Thank you very much sir
Oooh thanks it's very helpful ❤❤❤
But isn’t that peroxid
thanks!
Thanks sir
Thank you so much I’ve an exam on Saturday this helped me a lot thanks
I really love your voice which makes it a great addition for any of your videos. Also, you're one of the oldest channel here in yt so I'd like to appreciate how you can still keep going ❤❤
Thanks for the kind words!
10yrs old video still helps me
Thankyou my exam is gonna be easy . I can't tell how grateful iam 🫡🫡
Thankyou sir...for explaining..😊
Thxxx
This video was very helpful
Sir how can I find neutrons of ions?
complete and balance thes equation H2SO4+NaHCo3
Oh nitrogen monoxide ✨️ boop ✨️
i do icse board and i am class 9
Bro helped me do my entire homework
Please balance it
Whats diatonic?
Ok sir
Realy Dr.B is very intelligent person ❤
THANKS SIR BECAUSE I WAS ABSENT IN MY SCHOOL SO THAT I WAS NOT ABLE TO LEARN BEACAUSE OF MY SURGERY THANK YOU SOO MUCH 😢
Happy to help and wishing you a speedy recovery!
These videos are very helpful they help me visualize the melecular geometry in 3d and identity the bond angle so easily in my exam
Thanks alot
Chemistry is my headache but because of this video I got B3 in Chemistry ⚗️ which I liked it so practice balancing equation is the basics of Chemistry
Thank you ❤❤
Al dente
I guess it can be called single metal displacement reaction?