What volume of 2M NaOH is required to completely neutralize 20 ml of 4M H₂SO4? Number only no units needed

Calculate the percent difference between x2 and x4 according to the equation below. (Assume x2 to be the accepted value.) Record the calculation in your notes.  x2 = 100.4 kJ x4 = -100.4 kJ  %difference = experimental value - accepted value x 100%                                          accepted value

Many chemistry problems result in equations of the form x² (0.329 - x) When this equation is solved, the two values of the unknown x are 1.66 x 10-2 = and

Calculate the amount of heat needed to boil 25.2 g of water (H₂O), beginning from a temperature of 4.4 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 X

How can I round this number?  Example: Cp = qmetal =  -365.4 cal           = 0.0501 cal/g°C           m∆T    (109.7g)(-66.5°C) help me with this  Cp = qmetal = -77.0 cal        =  0.09803921cal/g°C           m∆T   (109.7g)(-66.5°C)

Which of the following pairs of atoms would produce a polar covalent bond? The following reference item may be helpful to you in determining the correct answer but should not be necessary: H 2.1 2323232-27559 228954585558 1.0 1.5 Be Na Mg 1.2 Cs Ce 1.1 Ba La 0.9 1.1 Ra Ac 0.7 0.7 1.1 Ca Sc Ti V 1.0 1.3 1.5 1.6 Sr Y 1.0 1.2 Electronegativity values of the elements (Pauling scale) B с 2.0 2.5 Al Si P 1.5 1.8 2.1 Cr Mn Fe 1.6 1.5 1.8 Zr Nb Mo 1.4 1.6 1.8 Tc Ru 1.9 2.2 Hf Ta W Re 1.3 1.5 1.7 1.9 Th Pa U Np 1.3 1.5 1.7 1.3 Pr Nd Pm Sm Eu Gd Tb 1.1 1.1 1.1 Os 2.2 carbon (C) and carbon (C) carbon (C) and hydrogen (H) carbon (C) and fluorine (F) carbon (C) and silicon (Si) 8962-2 Co 1.8 Rh 1.1 1.1 1.1 1.1 1.1 Pu Am Cm Bk 1.3 1.3 1.3 1.3 Ni Cu Zn 1.8 ZORNEN 2 Pd Ag Cd In Sn Sb Pt Au Hg Ti Pb Dy Ho Er Tm Yb 1.1 1.1 1.1 Cf Es Fm 1.3 Ga Ge As 1.9 1.6 1.6 1.8 2.0 2.4 2.2 2.4 1.9 1.8 1.8 1.9 1525 Md No 1.3 1.3 1.3 1.3 N 3.0 Lu 2.2 1.9 1.7 1.7 1.8 1.9 2.1 UN 1.1 1.2 0 Lr 3.5 S 2.5 Se Te Bi Po 2.0…

Perform the indicated conversion: 3.06 x 10³ cal = J A 1.28 x 104 J B 1.37 x 10-3 12.8 J D 7.31 x 105 731 J

Just #2 please

One student calibrated a 50-mL burette by using the mass of water delivered. The student used an analytical balance which was previously calibrated by STEEL (density = 7.8 g/mL). During calibration, the temperature of water was found to be 19.0oC. The density of water at this temperature is 0.9984 g/mL. The results of the calibration by the student is shown in the table below: Apparent burette reading, mL  A-10.05 ml, B- 20.04ml, C- 30.08ml, D- 40.07 ml, E- 49.98ml Weight H2O delivered, g A -10.03g, B- 20.09g, C- 30.05g, D- 40.02g, E- 49.83g   35. What is the true mass of water delivered in A? A) 10.03B) 10.04C) 10.05D) 10.06E) 10.07 36. What is the true mass of water delivered in B?A) 20.12B) 20.13C) 20.14D) 20.15E) 20.16 37. What is the true mass of water delivered in C?A) 30.13B) 30.11C) 30.10D) 30.09E) 30.08 38. What is the true mass of water delivered in D?A) 40.09B) 40.08C) 40.07D) 40.06E) 40.05 39. What is the true volume of water delivered in A?A) 10.00B) 10.02C) 10.04D)…

400 380 360 340 320 300 280 260 240 220 200 180 160 - 140 120 - 100 80 60 40 20 -20 - -40 -60 - -80 40 80 120 Heat (J) Temperature (°C)