Answers created by Jose

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• What is the relationship between heat transfer and calorimetry?
  
• Why does vinegar/acetic acid have a higher boiling point but lower surface tension than water? Which has the stronger intermolecular force then?
  
• Calculate the pH of 0.0070 M butanoic acid, which is a monoprotic acid; Ka=1.52 x 10−5. Assume that the 5% approximation rule applies. Provide your answer to two places after the decimal?
  
• How many g of sodium carbonate (molecular mass = 106) should be dissolved in 100 ml of water to make a 0.15 M solution?
  
• Calculate ph of solution labelled 2.6 M NaOH?
  
• What are adhesive forces?
  
• What are the three differences between diffusion and effusion?
  
• What causes electromagnetic energy? Where does it occur?
  
• Why is NH4 ion formed?
  
• How do you use Hess's Law to calculate enthalpy for this reaction?
  
• Calculate the pH during a titration when 10.00mL of 0.098 M HCl has reacted with 9.35 mL of 0.02 M NaOH?
  
• How do colloids size up?
  
• When 50 mL of liquid water at 25 °C is added to 50 mL of ethanol (ethyl alcohol), also at 25 °C, the combined volume of the mixture is considerably less than 100 mL. What is a possible explanation for this?
  
• How would I write 3/8^2.5 in radical form?
  
• #"C"_2"H"_(4("g")) + "O"_"2(g)" → "CO"_"2(g)" + "H"_2"O"_"(g)"# What is the coefficient of #"O"_2# in the balanced equation?
  
• Math Help???! Please?
  
• Given ∆H° for the following reactions:H2(g)+O2(g)➡️2H2O(l):Cu(s)+1/2 O2(g)➡️CuO(s)_What further data is needed, if any,for calculation of ∆H° for the following reactions? CuO(s)+H2(g)➡️Cu(s)+H20(g)
  
• What causes dipole interactions?
  
• What volume of oxygen gas, at 30.0ºC and 1.50 atm, is produced when 75.0g of water is electrolyzed? 2H2O --> 2H2 + O2
  
• What two propeties affect the density of ocean water?
  
• A 0.682 g sample of ICl(g) is placed in a 765 ml reaction vessel at 682 K. when equilibrium is reached in the reaction 2ICl(g) <=> I2(g) + Cl2(g) 0.0383 g of I2 is found in the mixture. What is Kc for this reaction?
  
• A student wants to make 135. mL of 8.5 M KBr by diluting a 6.0 M KBr solution. How much of that solution should be used?
  
• 15.5g of potassium nitrate is dissolved in 200cm 3 of water. How many moles of potassium nitrate are presented in 15.5g of the compound?
  
• The reaction? H2(g)+ I2(g)---> 2HI(g) may occur by the following mechanism: k1(--->) I2<=>2I (fast, equilibrium) k-1(<---) I + I + H2 ---> 2HI (slow) k2
  
• When excavating a hole how do you calculate mass 1mx1mx1m in to cubic metres ?
  
• In electrical insulators, why are the electrons not free to move unlike in conductors? Is it due to stronger bonds or attraction between nucleus and electron?
  
• How many grams of S were used? What is the freezing point of S in degrees C?
  
• How will we figure out the pressure on the ground exerted by a ballerina?
  
• 1 pts Anna Litical and Noah Formula are doing The Cart and the Brick Lab. They drop a brick on a 17.9 kg cart moving at 12.19 m/s. After the collision, the dropped brick and cart are moving together with a velocity of 5.71 m/s?
  
• Question #e7625
  
• Question #74069
  
• Question #c1f4d
  
• Suppose 10.000 grams of a hydrate were placed into a crucible and then heated until all the water was driven off. The mass of the anahydrate was 7.500 grams. Calculate the percent water in this hydrate?
  
• Question #d09ec
  
• Question #66236
  
• Titration help?
  
• Question #5f2c1
  
• how a saturated solution can become supersaturated ?
  
• Question #7112c
  
• Question #63783
  
• Question #6d8b6
  
• Why does alcohol expand more than mercury?
  
• Question #3f297
  
• How is an emf induced by changing magnetic flux?
  
• How to write the chemical formula for : ? 1) gold(III) acetate 2) tungsten(VI) bromate
  
• Question #8cab7
  
• Question #e9576
  
• Question #69f5e
  
• Question #6c16b
  
• The equation of a circle is #x^2+y^2+8x−14y+56=0# . What is the radius of the circle?
  
• Why is the acidity order different in (a) and (b)?
  
• A spring with a constant of #12 (kg)/s^2# is lying on the ground with one end attached to a wall. An object with a mass of #8 kg# and speed of #9 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?
  
• Question #7ce68
  
• Which type of bonds share electrons unequally, polar or nonpolar?
  
• Why does the +I effect increases here?
  
• If x = sqrt y/1+2y which of the following is equal to y? Answers A=1-x^2/x^2 , B= x^2/1-2x^2 , C=x^2/1+x^2, D= x^2/1+x^2, E=x^2/3
  
• Question #390a5
  
• Explain the difference between polarity and electronegativity?
  
• Question #77668
  
• Are substituted biphenyls optically active?
  
• How do the two differ - (1) adding water to acid and (2) adding acid to water?
  
• How do you solve #2x - 7+ 6x - 9= - 3x + 8- 7x - 12#?
  
• Question #d2e31