Measurement in Chemistry: Perform the following computation, expressing your answers to the proper number of significant figures. 16,34023.4216,34023.42 6.000 X 4.000 3.07 X (17.6 - 13.73)
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Measurement in Chemistry:
Perform the following computation, expressing your answers to the proper number of significant figures.
- 16,34023.4216,34023.42
- 6.000 X 4.000
- 3.07 X (17.6 - 13.73)
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- The number of people present at an outdoor rock concert was estimated by police to be 40,000. What is the high and low estimate for the number of people present at the concert if it is assumed that this estimate has each of the following uncertainties? a. 10,000 b. 1000 c. 100 d. 10What is the result of the following calculation to the correctnumber of significant figures?(6.266 − 6.261) ÷ 522.0 = a) 9.5785 × 10–6b) 9.579 × 10–6c) 9.58 × 10–6d) 9.6 × 10–6e) 1 × 10–5A student found an object to weigh 163.46g. The “true” weight was known to be 163.24g. Calculate the accuracy (in ppt) of the student’s measurement.
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- Perform the following calculations, and report numbers with correct significant figures: (6.626 x 1023) (3.00 x 108) ÷(4.5 x 10-7)A) 4.417 x 1038 B) 4.42 x 1038 C) 4.41 x 1038 D) 4.4 x 1038 E) None of the above Group of answer choices A B C D EHow do I include units into my slope intercept Units - g mL 1. Y=1.2534x+0.0250 Answer- Y=1.2534x ( mL ) + 0.0250 (g) 2. Y = 0.997x + 0.0585 Answers y=0.997x(mL) + 0.0585 (g)Carry out the following operations and express the answers with the appropriate number of significant figures. (a) 14.3505 + 2.65 (b) 952.7 - 140.7389 (e) 13.29 × 104210.25012 (d) 0.0588/0.677
- Show all the work and setps. Perform the following calculations using your calculator and then express the answer in the correct units and number of significant figures. 7.945 J + 82.3 J − 0.02 J 0.0012 m − 0.000 45 m − 0.000 11 m 500 g + 432 g + 2 g 31.2 kPa + 0.0035 kPa − 0.147 kPa 312 dL − 31.2 dL − 3.12 dL 1701 kg + 50 kg + 43 kgCarry out each calculation and report the answer using the proper number of signifi cant fi gures. a. 53.6 × 0.41c. 65.2 ÷ 12e. 694.2 × 0.2 b. 25.825 − 3.86d. 41.0 + 9.135f. 1,045 − 1.26A student dissolves 12.4g of ammonium nitrate (NH4NO3) in 200.g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0°C to 16.9°C over the course of 7 minutes. NH4NO3(s) → NH+4(aq) + NO−3(aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. 1. Is this reaction exothermic, endothermic, or neither? 2.If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. = kJ 3.Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3. = kJ/mol