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please help find the volume of KOH required to reach

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Get college assignment help at Smashing Essays Question please help find the volume of KOH required to reach the eq. point ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 10.52.07 AM.png A volume of 40.0 mL of a 0.340 MHNO: solution is titrated with 0.610 MKOH. Calculate the volume of KOH required to reach the equivalence point. Express your answer to three significant figures, and include the appropriate units.

When an acid is added to a buffer solution, the

Question When an acid is added to a buffer solution, the buffer will…

Calculate the entropy change when 0.4 mol ethanol (CH3 style=”color:rgb(0,0,0);”>CH2OH)

Question Calculate the entropy change when 0.4 mol ethanol (CH3 style=”color:rgb(0,0,0);”>CH2OH) vaporizes at its normal boiling point of 78.5oC. The heat of vaporization of ethanol is 42.6 kJ/mol.

SHOW ALL WORK!!!!Identify the elements denoted by the electron configurations

Question SHOW ALL WORK!!!!Identify the elements denoted by the electron configurations shown below:  1) 1s22s22p63s23p6
2) 1s22s22p63s23p64s23d04p1
3) [Ne] 3s23p2
4) Fill in the orbital diagram below for the element you identified in #1. (0.5 pts) ____________________ (0.5 pts) ____________________ (0.5 pts) ____________________ (0.5 pts) 5) Determine which of the molecules below contain polar covalent bonds AND use the appropriate symbols to represent the positive and negative poles. (1 pt) a) H-F b) N-N c) H-O-H d) H-Cl 6) Determine the bond energy of the H-Cl bond given the following: (0.5 pts) The bond energy of the H-H bond is 434 kJ/mol and the bond energy of the Cl-Cl bond is 232 kJ/mol. 7) Using what you know about the relationship between bond length and atomic radius, determine which of the following has the longest bond length: (0.5 pts) a) H-H b) F-F c) Cl-Cl d) Br-Br e) I-I 8) Draw the Lewis dot structures for each of the following molecules (1 point): a) NOF b) H2CO  9) Determine the Lewis structure, VSEPR, and Name of Shape for the following (1 point) a) CH2O b) BeCl2  10) Correctly name the following compounds: (0.5 pts) a) Na2SO4
b) Ba(NO3)2
c) Ca3(PO3)2 d) H2SO4 11) Determine the formulas for the following compounds: (0.5 pts) a) calcium carbonate
b) iron(III) chloride
c) tin(II) chloride d) hydroselenic acid 12) Determine the oxidation number of each element in the following compounds: (0.5 pts) a) N2
b) H2SO4 c) PCl3 d) HClO4 N=___ H=___ P=___ H=___ S=___ O=___ Cl=___
Cl=___ O=___ 13) (1.5 pts) You fill an uninflated balloon with 18 grams of solid CO2 (dry ice, M= 44.0 g/mol). What volume will the dry ice occupy when it vaporizes at 25oC and 1.02 atm? The balloon has capacity of 6.5 liters, will it pop? 14) (1 pts) What is the density in g/L of neon at standard temperature and pressure (STP)? 15) (1.5 pts) An average dairy cow produces 10,896 grams of methane gas, CH4, each year. What volume of CH4 is produced at 25oC and 740 mmHg? (Hint: convert grams to moles of CH4) 16) (1.5 pts) What is the partial pressure of helium gas in a mixture of 32 grams of oxygen and 32 grams of helium held in a vessel at a pressure of 1450 torr? (1 point) 17) (0.5 pts) Convert the following: a) 430 mmHg to atm b) 680 mmHg to torr 18) (1 point) How would you make 350 mL of 26% (w/v) NaCl? (Be sure to include final volume of water needed) 19) (0.5 pts) What does 10% (w/v) NaCl mean? 20) (1 point) You have a stock solution of 25X TAE Buffer. How would you prepare 500 mL of TAE Buffer at working concentration (1X) from the 25X stock? 

In the formation of 1.0 mole of the following crystalline

Question In the formation of 1.0 mole of the following crystalline solids from the gaseous ions, the most energy is released byA) NaFB) MgF2C) BrBr2D) AlF3E) AlBr3

This question was created from 01_2 https://www.coursehero.com/file/21091861/01-2/ I really just

Question This question was created from 01_2 https://www..com/file/21091861/01-2/ I really just need the answer ATTACHMENT PREVIEW Download attachment 21091861-333304.jpeg Problem 1.1 Irt A Which of the images shown represents a pure element, a mixture of two elements, a pure compound, a mixture of an element and a compound? (More than one picture might fit each description.) 1 – pure element 2 – mixture of two elements 3 – pure compound 4 – mixture of an element and a compound Drag the items into the appropriate bins. (i) (ii) (iii) O (iv) (v) (vi)

Write the balanced net ionic equation for the reaction.

Question Write the balanced net ionic equation for the reaction.

Write the balanced net ionic equation.

Question Write the balanced net ionic equation.

Chemistry question show detailed ATTACHMENT PREVIEW Download attachment Screen Shot

Question Chemistry question show detailed ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 2.30.50 AM.png 3. Aluminum hydroxide is commonly used as an antacid. If you were to run this same experiment using aluminum hydroxide, what would you expect the pH to be after filtration? Show all your work. Hint: Start with the literature Ksp value. a. Does this answer make sense? Explain. b. If you were to use it as an antacid, how might your hydroxide compare to aluminum hydroxide?

Chemistry question, just one please. Thank you so much! ATTACHMENT

Question Chemistry question, just one please. Thank you so much! ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 2.31.17 AM.png a. Magnesium hydroxide is commonly used as an antacid, while barium, calcium, and strontium hydroxide are not. Explain.

Chemistry question, show detailed, thank you very much! src=”/qa/attachment/9176052/” alt=”Screen

Get college assignment help at Smashing Essays Question Chemistry question, show detailed, thank you very much! src=”/qa/attachment/9176052/” alt=”Screen Shot 2019-08-05 at 2.31.23 AM.png” /> ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 2.31.23 AM.png b. Calcium carbonate is a commonly used antacid. What might be some advantages or disadvantages to using carbonate instead of hydroxide for an antacid? Include an appropriate chemical equation in your answer.

what act of a carbon atom that contributes to its

Question what act of a carbon atom that contributes to its ability to form a diversity of organic molecules?

which of the following is an example of potential energy?A)

Question which of the following is an example of potential energy?A) A rock at the top of the hillB) Concentration gradientsC)both(choose the most correct)

need answers to all please show work ATTACHMENT PREVIEW Download

Question need answers to all please show work ATTACHMENT PREVIEW Download attachment LOL 2.PNG

Need Help Please Show all Work ATTACHMENT PREVIEW Download attachment

Question Need Help Please Show all Work ATTACHMENT PREVIEW Download attachment LOL3.PNG

Need Help Please Show WORK ATTACHMENT PREVIEW Download attachment Lol4.PNG

Question Need Help Please Show WORK ATTACHMENT PREVIEW Download attachment Lol4.PNG

Which of the following is an example of potential energy?-Concentration

Question Which of the following is an example of potential energy?-Concentration gradient-Rock top of hill-Chemical bonds

  1. The importance of the different sample preparation for different types

Question

  1. The importance of the different sample preparation for different types of analysis (In soil analysis)?
  2. The effect of different extractants on the sample. ( in soil analysis)?
  3. The comparison between total and bioavailable metal and implication.
  4. The effect that interferences in ICP-OES have on results?
  5. Identifying the different types of interferences and determining how to overcome interferences. (in soil analysis)

List the three subatomic particles of the atom. Indicate the

Question List the three subatomic particles of the atom. Indicate the charge of each. What is the difference between an atom and a molecule? What is the difference between a molecule and a compound? Provide an example of an atom, a molecule, and a compound.

Please help me find the pH for each value. ATTACHMENT

Question Please help me find the pH for each value. ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 10.24.22 AM.png

Please help me find pH value for each solution, thank

Question Please help me find pH value for each solution, thank you ATTACHMENT PREVIEW Download attachment Screen Shot 2019-08-05 at 10.24.43 AM.png

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