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round up to 4 significant figures SHOW ALL WORK AS DEMONSTRATED IN CLASS 12 FEET THE...
4. pH Calculations. Show all work and round to the correct number of significant figures. a. What is the pH of a 5 x 10-14 M hydronium ion solution? b. What is the pH of a .26 M hydroxide ion solution?
5. Concentration Calculations. Show all work and round to the correct number of significant figures. a. The pH of a solution is 12.76. What is the hydronium ion concentration? c. What is the hydroxide ion concentration?
Show all steps as demonstrated in class. All proportions should be rounded to 4 decimal places and z-scores to 2 decimal places for consistency and accuracy. 1. According to a recent Gallup poll, 10% of Americans do not eat breakfast. You wonder if this figure is different among PCC students. a. State the null and alternative hypotheses, and define the parameter. b. Suppose we take a random sample of 450 PCC students. Do we meet the conditions for the distribution...
Note: Calculate up to 3 significant figures. Show all steps. Assume Vp VBE 0.7V(except for the part (I)) and p p+1-100. You must show a general expression using component symbols before using numbers. (4) Assume Vcc 10.7V, R2 1k and R3 0.5k. (a) For R1 - 200k, find the Q-point (IEo and VcEO). (15 pts.) (b) Find the range of R1 that will keep the transistor from saturation, i.e., VceVcesat 0V. (10 pts.) аз
Problem (Show all work, use diagrams, clearly identify the solution in proper significant figures) 4.) A 3.0x10sQ resis tor and a 1.OuF capacitor are connected in a single-loop circuit with an At 1.0s after the connection is made, what are the rates at which i.) the charge emf of 4.OV. of the capacitor is increasing, ii.) energy is being stored in the capacitor, ili.) Joule heat is appearing in the resistor, and iv.) energy is being delivered by the emf?
Round off the following numbers to three significant figures. 58240,400.4, 7.999, 0.07912, 9.245x10-4 please show me how
Show your work, include units, and report the correct number of significant figures for all calculations. 1. The molal freezing point depression constant (K) for p-dichlorobenzene is 7.10°C/m and its normal freezing point (f.p.) is 53.10°C. When 0.209 g of an unknown solute is dissolved in 4.00 g of p-dichlorobenzene, the f.p. is lowered to 50.20°C. Refer to the Introduction and Data Sheet to solve the following problems. °C. a) The f.p. depression (AT) is b) Calculate the molality (m)...
please answer all and show all the work. thanks Show the correct number of significant figures and units for all measurements and calculations. A. Empirical formula Mass of crucible and lid 14.59289 14.95279 Mass of crucible, lid, and magnesium Appearance of magnesium ribbon: Appearance of product: 15, 11999 Mass of crucible, lid, and product Calculations (Show your work) Mass of magnesium ribbon (show calculations) Mass of magnesium oxide product (show calculations) Mass of oxygen (show calculations) Number of moles of...
Show work for partial credit. Assume 3 significant figures for all numerical values. Write all answers on the sheets provided; work written on the test sheet will not be graded. g= 9.80 m/s 1 atm = 101 kPa 1L = 10 m G-6.67 x 10''Nm²/kg? 1. (12 points) Compute the heat absorbed by and the work done on 0.400 moles of a diatomic gas (Cy = 2.5R, Cp = 3.5R ) for each of the following processes (give your final...
Use a minimum of 4 significant figures in all calculations, and round and report your answers to 3 significant figures. Give complete answers - magnitude, units, and direction for vectors. Xity Box your answers (30 pts.) The car B turns such that its speed is increased at a rate given by a = 0.5e' m/s?, where t is in seconds. If the car starts from rest at t 0, determine the magnitudes of its velocity and acceleration when t =2...