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Solved in 2 steps
- Calculate to the correct number of significant figures. (24.6681 x 2.38) + 332.58.Perform the following calculations and express each answer to the correct number of significant figures. a) 0.0467 × 64 = b) 1780 + 3500 + 21.77 =Perform the following calculations to the correct number significant figures. (23.4813 x 2.52) + 374.99
- Find the difference between the value of x2 and the sum of x1 plus x3.; let x4 be equivalent to the sum of x1 and x3 and let x5 be the difference between x2 and x5. This calculation scheme is shown below. Make notes about any similarities or differences between the values in your notes. x4 = x1 + x3 x5 = x2 – x4 Data Analyis This section will include all data collected during the lab. Thermochemical Data Tinitial (°C) Tfinal (°C) ΔT (°C) moles NaOH qreaction (kJ) ΔHrxn Reaction 1 25.0 30.3 +5.3 0.025 -1.11 -44.4 Reaction 2 25.0 37.0 +12.0 0.025 -2.51 -100.4 Reaction 3 25.0 31.7 +6.7 0.025 -1.40 -56.1 Reaction 1: NaOH(s) → Na+(aq) + OH-(aq) + x1 kJ 1g /39.977g/mol = 0.025 moles Moles NaOH = 0.025 qsolution = (4.184 J/g °C) (50.0g) (30.3°C -25.0°C) = -1108.76 J/ 1000 qreaction (kJ) = -1.11 kJ ΔH = -1.11 kJ/ 0.025 moles ΔHrxn = -44.4 kJ/mol…The number 7.134×10^7in normal decimal notation is?between significant digits are always significant. figures. Example: 5,007 has 4 significant figures. 3) Trailing zeros in a number are significant only If the number contalns a decimal polnt. Example: 100.0 has 4 significant figures. 100 has 1 significant figure. 4) Zeros in the beginning of a number whose only function Is to place the decimal polnt are not significant. Example: 0.0025 has 2 significant figures. 5) Zeros following a decimal significant figure are significant. Example: 0.000470 has 3 significant figures. 0.47000 has 5 signlficant figures. Determine the number of significant figures in the following numbers. 1. 0.02 6. 5,000. 4. 2. 0.020 2. 7. 6,051.006 3. 501 3 8. 0.0005 1. 4. 501.0 9. 0.1020 5. 5,000 10. 10,001 5 Determine the location of the last significant place value by placing a bar over the digit. Example: 1.700) 9,010.0 4.7x10-8 10,8 00,000 3.0Tx 1021 0.00410 1. 8040 6. 90,100 0.0300 699.5 2,000X162 0.90100 2. 0.0300 7. 4.7 x 108 3. 699.5 8. 10,800,000. 3.…
- perform the following calculation, reporting your answer to the correct number of significant figures and with the correct unit. 120.5 g + 32.567 g =1. Carry out the following mathematical operation and give the answer before rounding 4.396 g + 102.40 g + 2.51 g = 2. Now give the answer by rounding to the correct number of significant figures and units (hint: make sure you apply the specific rule for the addition/subtraction math operation)Express 53.8°C in units of Kelvin. Express your answer to two decimal places.
- Evaluate the expressions and report the answer to the proper number of significant figures. 101.27 = 101.11 = 101.19 =Evaluate the expression and report the answer to the proper number of significant figures. log (9.9 x 106) =Do the following calculation of measured masses from an experiment: 5.656 g + 168.435 g + 75.657 g Calculate the total mass (g) to the correct number of decimal places. Calculate the answer and round to significant figures.