Answers created by Shubh

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• How do you draw pi bonds?
  
• Which of the following is a combustion reaction? A. CaCO3 (s) → CaO (s) + O2 (g) B. C (s) + O2 (g) → CO2 (g) C. 2Na (s) + Cl2 (g) → 2NaCl (s) D. H2 (g) + Cl2 (g) → 2HCl (g)
  
• Complete the square for 2x2 – 4x = 14? A. (2x – 2)2 = 30 B. (2x – 1)2 = 15 C. (x – 1)2 = 8 D. (x + 1)2 = 8
  
• Which reaction takes place at anode?
  
• Which is the morality of Y when 180 g of Y is dissolved in enough water to make a 3 L solution? (Y =30 g)
  
• It is question about finding tension and force in the picture below ?
  
• What are the steps in balancing equation? How to balance chemical equations? Give some examples.
  
• How do you find 25.8% of 4000?
  
• Complete the half equation?: #MnO_4^-" + X -> Mn^2+Y# What are X and Y?
  
• What is the molarity of a solution that contains 5.0 moles of solute in 2.0 liters of solution?
  
• How do you complete the equation #C_8H_18 -> C_6H_14 + __#?
  
• What is the molarity of a 0.45 % (m/v) NaCl?
  
• Molarity Calculation?
  
• What is the equation of a circle with center (1,3) and containing the point (1,0)?
  
• How can the ideal gas law can be simplified?
  
• Angle R and Angle S are alternate exterior angles. Find the value of x if R=7x and S=175?
  
• How do you find the square root of 820?
  
• What are galvanic cells in terms of oxidation/reduction reactions?
  
• An atom has 18 protons, 18 electrons, and 20 neutrons. This atom has _____. A) a negative charge B)an atomic number of 20 C)a mass number of 38 D) a positive charge Which one of these is the answer?
  
• How do you integrate # e^(x^2)# from 0 to 1?
  
• 4.70g of Na2SO4 is added to enough water to make 150.0mL of solution. What is the percent by mass of Na2SO4 of this solution? The density of the solution is 1.01g/mL.
  
• What is the concentration of HF under these conditions (listed in details)?
  
• Arrange in ascending order: #0.48, 2/3, 16.05, 3/5, 0.005#?
  
• How can the low vapor pressure of water be explained?
  
• Which molecules can exceed the octet rule? why is that?
  
• How many moles of chlorine gas are needed to make 0.6 moles of sodium chloride given the reaction: #2Na + Cl_2 -> 2NaCl#?
  
• How do you divide #2/7div1/3#?
  
• Please solve q 206?
  
• How many grams is #5.72 * 10^21# atoms of #Li#?
  
• Please solve q 205?
  
• What is the mass percent of sodium fluoride solution prepared by dissolving 0.64 moles of sodium fluoride into 63.5 grams of water?
  
• How many grams of NO2 is required to produce 45.3 grams of NO?
  
• How are metals and non-metals similar?
  
• What is the value of x when 2x+3=3x-4?
  
• I really bad at physics can someone help me with this question ?
  
• Please solve q 180?
  
• How do you simplify #16^(-1/4)#?
  
• A bicycle with tires 68cm in diameter travels 9.2km. How many revolutions do the wheels make?
  
• How do you factor the expression #3x^2 + 15x -42#?
  
• What are all the important formulas for the chapter Thermodynamics?
  
• How do you find the slope and intercept of #18x + 4y = 112#?
  
• How do you express #1.399times10^5# in standard form?
  
• How do you find the slope and intercept to graph #2x + y = 4#?
  
• An airplane is flying in a horizontal circle of radius 1.5 km with a speed of 450 km/h. What is the magnitude of the centripetal acceleration of the plane?
  
• What is the distance between #(3, –1, 1) # and #(2, –3, 1) #?
  
• Derivative of x?
  
• Is 0.571428 a rational or irrational number?
  
• Given the acceleration as (3t^2+2)i+6e^(-2t) j+10cos 5tk, find the magnitude of velocity at t=0?
  
• How do you simplify #-2x^2(4x^3 +2x - 1)#?
  
• Int 1/1+x^6 =?
  
• What is the derivative of #(2ln(x+3))/x^2#?
  
• How do I find this in terms of constant A? lim as h--> 0 7(a+h)^2-7a^2.
  
• How do you find the exact value of the six trigonometric functions of the angle whose terminal side passes through (12,16)?
  
• How do you know an object is moving?
  
• How do you rationalize the denominator and simplify #6/(sqrt(2x))#?
  
• How do you write 16100.00 in scientific notation?
  
• When the radius of a circle is multiplied by a factor of 3 33, by what factor will the circumference of the circle change?
  
• how do you integrate #int_0^1 1/sqrt(1+4x^2) dx# ?
  
• How do you write 0.0125 in fraction form?
  
• How do you simplify the expression #-(5+8n)+1#?
  
• How to solve this vector unit normal from Vector Calculus?:
  
• How do you evaluate #\frac { 8} { 10} + \frac { 8} { 9} - \frac { 2} { 8} #?
  
• How do you simplify #x^ { - 2} \cdot ( x y ^ { 2} ) ^ { 4}#?
  
• How do you evaluate the expression #sec30#?
  
• How do you solve the following linear system: # 5x+8y=1, -2x+3y=4, #?
  
• How do you simplify #root4(80/9)#?
  
• What is x if #5/(x+3) ≥ 3/x?#
  
• How do you multiply #(9k+q)(2k-q)#?
  
• Given cos x = 1/4, with x in the fourth quadrant, what is the exact value of sin x/2?
  
• How do you draw a single covalent bond?
  
• How do you write #10^-4# in decimal form?
  
• Prove that lim 1/(x^3+1)=2 when x approaches 1?
  
• What exactly do find when we dot and cross two vectors?
  
• How do you multiply #3/7 times 4/5#?
  
• How do you simplify #1- (sin^2 theta/ (1-cos theta))= -cos theta#?
  
• How do you simplify #4f ^ { 2} + 6f ^ { 2} - 4f ^ { 2} + 9f ^ { 2}#?