Answers edited by Dwight

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• Question #1e9b2
  
• Glucose is used as an energy source by the human body. The overall reaction in the body is described by the equation C6H12O6(aq) + 6O2(g) = 6CO2(g) + 6H2O(l). How many grams of oxygen are required to convert 28.0 g of glucose to CO2 and H2O?
  
• How do you solve #(x-2)/3+1/6=5/6#?
  
• How does electrolysis chemistry work?
  
• Given Vector A: 25.2cm at 81.6 degrees and Vector B: 32.1 cm at 142.7 degrees. How do you add and subtract these two vectors?
  
• Question #7f1e2
  
• Calculate the heat required to raise the temperature of 0.75 kg of water from 5˚C to 90.˚C?
  
• Question #357c1
  
• What would happen if a positively charged sodium ion and a negative chlorine ion came into contact?
  
• Is Earth itself an open or closed system?
  
• How you would separate the components of a mixture of sugar and sand. Would your methods result in physical or chemical changes?
  
• Question #e1a36
  
• A charge of #5 C# is at the origin. How much energy would be applied to or released from a # -2 C# charge if it is moved from # ( 3 , 6 ) # to #( -3 , 5) #?
  
• How do you simplify #(2 2/9)/ (3 1/3)#?
  
• How does lightning work?
  
• Question #87f7d
  
• Question #3f70e
  
• Question #a4f57
  
• What happens to the reactivity of nonmetals within a group from the top of the group to the bottom?
  
• A projectile is shot at an angle of #pi/3 # and a velocity of # 11 m/s#. How far away will the projectile land?
  
• Why is HCI(g) capable of being dissolved in water?
  
• Can anyone explain this problem with an aid of a diagram?
  
• Two of the energy levels can hold eight electrons each. Which energy levels are these?
  
• Question #f5709
  
• Question #11a9a
  
• What net lonic equation can be derived from this complete ionic equation? #2Fe^(3+)(aq) + 6Cl^-(aq) + 6Na^+(aq) + 3CO_3^(2-)(aq) -> Fe_2(CO_3)_3(s) + 6Cl^-(aq) + 6Na^+(aq)#?
  
• Question #2f265
  
• Most of the mass of the atom is provided by what?
  
• Driving 1000 miles a month is not unusual for a short-distance commuter. If your vehicle gets 19.70 mpg, you would use approximately 50.76 gallons of gasoline every month. If gasoline is approximated as C8H18 (density = 0.703 g/mL)...?
  
• Question #5d51d
  
• Question #5c5a5
  
• Question #b278f
  
• A charge of #2 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #25 J# to #18 J#, what is the voltage between points A and B?
  
• What is a quantum number?
  
• How would atmospheric circulation be affected if earth's speed of rotation were doubled?
  
• How is the universe expanding faster than the speed of light?
  
• A gas expands from 35 ml to 70ml. if the temperature was at 22 Celsius, what will the final temperature be?
  
• Question #b7858
  
• Question #9e16b
  
• If #f(x)=abs(x^2-3)#, how do you find f(2)?
  
• Question #75d2f
  
• Question #2cc01
  
• Atoms of which element have the greatest tendency to gain electrons?
  
• Question #9b844
  
• How do you solve #4r^2+1=325#?
  
• Question #69805
  
• An object, previously at rest, slides #3 m# down a ramp, with an incline of #pi/6 #, and then slides horizontally on the floor for another #8 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?
  
• Question #2b052
  
• Question #b237f
  
• A 29.80 g sample of liquid cadmium at 377.00°C is poured into a mold and allowed to cool to 24.00°C. How many kJ of energy are released in this process?
  
• Magnesium reacts with titanium(4) chloride to produce magnesium chloride and titanium metal. How do you write a balanced equation for this reaction?
  
• If #sin theta = 21/29#, what is #cos theta# and #tan theta#?
  
• What are chemical process in which larger compounds are broken down into their monomers using water to break the bonds?
  
• How can displacement be used to find the density of an object water?
  
• Question #dc16a
  
• Question #57781
  
• A model train, with a mass of #8 kg#, is moving on a circular track with a radius of #2 m#. If the train's kinetic energy changes from #8 j# to #36 j#, by how much will the centripetal force applied by the tracks change by?
  
• Question #d96db
  
• When does the shape of a molecule affect its polarity?
  
• Question #305e7
  
• Question #74703
  
• The product of two numbers is 144, and the sum of the two values is -7. What is the value of the smaller of the two numbers? A) 1 B) 5 C) -9 D) 14
  
• Question #af8bf
  
• What is the difference between an oxyacid and an organic acid? What are examples of each?
  
• A red blood cell is placed in a concentrated sugar solution. What happens and why?
  
• How do you evaluate 20P2?
  
• A cylinder has inner and outer radii of #8 cm# and #16 cm#, respectively, and a mass of #6 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #2 Hz# to #7 Hz#, by how much does its angular momentum change?
  
• What type of reaction feels cold to the touch?
  
• What is the angular momentum of a rod with a mass of # 8 kg# and length of #4 m# that is spinning around its center at #12 Hz#?
  
• If a #3kg# object moving at #15m/s# slows down to a halt after moving 25 m, what is the friction coefficient of the surface that the object was moving over?
  
• What are single and double covalent bonds?
  
• Question #c36ae
  
• How to determine functional group?
  
• Why gravity is still regarded as one of the fundamental forces?
  
• Question #7c8db
  
• Question #9c42e
  
• A ball with a mass of # 5 kg# is rolling at #18 m/s# and elastically collides with a resting ball with a mass of #2 kg#. What are the post-collision velocities of the balls?
  
• Co-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of Co–60 atoms will remain in a particular sample after 26.5 years?
  
• Question #25ba6
  
• Question #f26ba
  
• Uncontrolled shivering, slow slurred speech, memory loss, irrational behavior, lack of movement, and sleepiness are symptoms of what dangerous condition?
  
• Would a reaction occur if a piece of #Sn# metal were placed in a #ZnSO_4# solution?
  
• Question #02a25
  
• Question #0bb5c
  
• Janice is going on vacation and needs to leave her dog at a kennel. Nguyen'ts Kennel charges $15/day plus $20 processing fee. The Pup Palace charges $12/day and a $35 processing fee. After how many days is the Pup Palace Kennel cheaper than Nguyen's?
  
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