Chem103.M1ProblemSet

Complete the following using significant digits rules. Report your answers using the correct number of significant digits. A.) 0.368 + 12.24 - 6.742 B.) (30.86) x (15.667) x (0.28) C.) (1600 ÷ 2.24) + 1.185 D.) (1260 + 42.35) ÷ 6

Please don't provide handwrittin solution....

Please answer both questions.

Laboratory Experiments 15 QUESTIONS 1. Identify each of the following as measurements of length, area, volume, mass, density, time, or temperature. (a) ns, (b) 10.0 kg/m', (c) 1.2 pm, (d) 750 km², (e) 83 K, and (f) 4.0 mm. 3 0/4vime b) 2. Carry out the following operations and express the answer with the appropriate number of significant ngures and units: (a) (5.231 mm)(6.1 mm), (b) 72.3 g/1.5 mL, (c) 12.21 g + 0.0132 g, and (d) 31.03 g+ 12 mg. 3. Drug medications are often prescribed on the basis of body mass. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 160 lb person. 4. A man who is 5 ft 10 in. tall weighs 160. lb. What is his height in centimeters and his mass in kilogram 5. Determine the boiling point of water at 672 mm Hg. 6. A pipet delivers 9.98 g of water at 19 °C. What volume does the pipet deliver? 04 mL. 10.2 mL, 10.8 mL, and 10.6 mL in consecutive trials. Find the mea

A cooking recipe lists adding 3.0 qt of water as a step. How many mL of water is this?

Please answer questions 2&3

Precision refers to __________. Group of answer choices how close a measured number is to the true value how close a measured number is to the calculated value how close a measured number is to zero how close a measured number is to other measured numbers how close a measured number is to infinity

please answer 4 and 5 and show solution. type the answer and solution

Please help with 7&8

Part B.1: Measuring the volume of a sample of water. Measuring Device Beaker Graduated Cylinder Measured Value 41 mL 38.0 mL Number of Significant Figures | Which measuring device is more precise? The beaker or the graduated cylinder? [ans]

Instructions for this problem say, "Solve each problem and report your answer to correct significant figure and units. Remember that units multiply, divide, add, subtract, and simplify just like variables." (3.1 x 10^4 nm^2)^1/2   How do I solve with a half exponent? Image of my attempt attached.

[References] Use the References to access important values if needed for this question. Write each of the following numbers in exponential or scientific notation. Write each number to two decimal places with only one non- zero digit before the decimal point. Example: Use 1.20 × 104 not 0.120 × 10-³ or 12.0 × 10-5. 7640 0.000125 0.000844 257000 Submit Answer 4 Try Another Version 1 item attempt remaining Previous Next

General Chemistry Laboratory I Lab 1 Significant Figures and Dimensional Analysis Student name PRE-LABORATORY QUESTIONS 1. How many significant figures are in each measurement? (1) 0.0044500 m (2) 5.003 km (4) 1.00 x 10³ s (5) 0.002 mm 2. Define accuracy and precision. 3. Convert 1.567 kilometers to centimeters.ccurate d 4. Convert 3.70 milligrams to kilograms. O Date: Page 1 IN-LABORATORY WORKSHEET 1. Give the number of significant figures in each of the following numbers. (1) 1,278.50 (2) 120,000 (4) 0.0053567 (5) 670 (7) 8.002 (8) 823.012 (10) 2.60 (Prepared by W. Song) (3) 10 dm (6) 10,000 m (3) 90,027.00 (6) 0.00730 (9) 0005789

A human hair is 75 um across. How many inches is this? STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) %D 0.01 100 10 1 1x 10° 1 x 10-6 0.1 2.54 1 x 106 0.33 0.001 0.003 3.0 1 x 10-9 75 1000 0.00003 in mm cm um 30

Use the data set below to answer the following question. This is a fictitious data set, so no units are listed. Data Set 282 294 270 276 232 295 For the data set above, the Q-test suspect value is type your answer. and based on the statistics you can choose your answer. that value with 90% confidence.

Please correct answer and don't use hand rating

8) The vessel to be weighed should be placed of the pan. (off to the side, or in the center) 9) After heating a sample in a dish it will save time to weigh it immediately or cool it completely? 10) To avoid the errors in mass due to the use of balances that are not calibrated, one should weigh by a method called 11) If you weigh a hot object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it cools to room temperature? (higher, the same, or lower) 12) If you weigh a cold object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it warms up to room temperature? (higher, the same, or lower)

Calculate the area of a rectangle in cm² with a width of 6.7 cm and height of 3.0 cm. Be sure to include the proper number of significant figures. Type answer: