What is the estimated digit? A measurement done with no tools A digit added by the operator beyond the measuring tool precison A common error done when measuring O The first digit of the measurement. For example, in "123" the "1" is the estimated digit.

Q: A chemistry student needs 20.0 g of acetone for an experiment. By consulting the CRC Handbook of…

A: Given mass of acetone is 20 g density of acetone is 0.790 g/cm3  volume of acetone is determined as

Q: If a test tube is 125.0 mm long and 1.50 cm in diameter, assuming a perfect cylinder, calculate the…

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Q: Convert 3.00 yards to to dm (decimeters) dm How many significant figures should the answer be…

A: 1 yard = 9.144 dm

Q: When 20.76 is added to 54.2, the result should be reported with When 23.5 is subtracted from 36.13,…

A: The rules for significant figures in mathematical operations: 1. In the case of addition and…

Q: The velocity of an object is the distance it travels per unit time. Suppose the velocity cm of a…

A: The velocity of the gliding bird=225 cm/s Distance travelled by the bird= 2.7 m First, convert…

Q: A solid with an irregular shape and a mass of 11.33grams is added to a graduated cylinder filled…

A: Given: mass of solid = 11.33 g volume of water in cylinder before adding solid = 35 mL volume of…

Q: D. Determining the Density of a Metal Block 246.1389 Mass of metal block Value of smallest markings…

A: Given that -  Mass of the metal block = 246.138 g  Length of block = 2.98 cm Width of block =  2.98…

Q: A student sets up the following equation to convert a measurement (The ? stands for a number the…

A: The given measurment is = 0.070 cm This measurement can be converted into a km unit by knowing the…

Q: The volume of a gas was measured to be 32.74 liters. If the density is 1.19 g/L, what is the mass of…

A: Denisty Formula density = mass of a gas/volume of the gas Given values  Mass of the gas =?  Volume…

Q: A flask containing 9.55 mL of a liquid weighs 157.2 g with the liquid in the flask and 148.4 g when…

A: Given: Weight of liquid containing flask=157.2 g Weight of empty flask= 148.4 g  Volume of the…

Q: You determined that the measurements I. Inches is 0.96  and you found out that the same measurement…

A: The relationship between inches and millimetre is 1inch = 25.4mm

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

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Q: what decimal power do the following abbreviations represent: (a)m, (b)k,(c)m,(d)n, and(e)u?

A: Please find the attached images for the answer

Q: Measurements have shown that the concentration of salt in seawater is 35.5 g·L 1 '. Calculate the…

A: Concentration is basically the availability of the solute per unit volume of solution. It is usually…

Q: Mn³+ + e- → Mn²+ E = +0.32 v2+ + 2e → V E = -0.49 - (the answer should be entered with 3 DIGITS; and…

A: Ecell =Ecathode- Eanode Cathode is  Vanadium  anode is Manganese

Q: the true density of methanol is 0.792 g/mL based on the answer 0.762 what is the percent error of…

A: Given— True density = 0.792 g/ ml Measured density = 0.762 g/ml

Q: A box contains a mixture of small copper spheres and small leadspheres. The total volume of both…

A: Consider the given information is as follows; Total mass mtotal = 4.36 kg = 4360 g Total volume…

Q: m cm - 4.2 × 10° х 10' ? S

A: For unit conversion, 1 m = 100 cm = 102 cm ( -4.2 × 105 ms) . 102  cm =  -4.2 × 107 cms

Q: Please make they are corect significant

A: We know that   Convert Calorie to Joules.  1 Cal = 4.184 Joules  1 Kcal = 1000 Calories = 103…

Q: What is the density in kilograms per cubic meter?

A: Given :- density of lead is 11.4 g/cm3  To calculate :- density of lead in kg/m3

Q: A sheet of aluminum (Al) foil has a total area of 1.000 ft^2 and a mass of 3.806g.  What is the…

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Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Distance is measured in different units such as meters (m) , centimeters (cm) , millimetres (mm) ,…

Q: How should he record his answer, to the correct number of significant figures?

A: In multiplication rounding off the answer to the least number of significant digits given in the…

Q: Conversions: include the correct number of significant digits and follow the format provided in the…

A: Given that , We have to convert 1.2 gram to micrograms  & 10.0 cm to inches.

Q: 9. Express 96.342 m using 2 significant figures The answer is

A: Rules for determining significant figures : 1) All non zero digit are significant. Example, 123…

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

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Q: Rewrite this measurement with a simpler unit, if possible. kg m 8.0 S'S Note: If you can simplify…

A: Answer: In this question, first of all we have to write the units in concise form and then have to…

Q: (a) The diameter of Earth at the equator is 7926.381 mi.Round this number to three significant…

A: (a) Given, diameter of earth = 7926.381 mi which is approximate equal to 7930 mi. Hence, the…

Q: The uncertainty in the measurement 0.0035 mg is

A: The mentioning of the number of significant figures is quite helpful in determining the uncertainty…

Q: Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when…

A: Given     mass of object = 149.8 g  Volume of object = 12.1 mL   To find : density of an object

Q: A piece of metal has a mass of 6g and it displaced 3 mL of water in a graduated cylinder. What is…

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Q: + e Mn2+ E = +0.32 - - 2e → V E = -0.49 answer should be entered with 3 DIGITS; do not enter units;…

A: In electrochemical cell,  Standard cell potential is given by E°cell = E°c - E°a = -0.49 -(0.32) =…

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Given,  Length in cm = 0.050 cm  Convert cm to km = ?

Q: When scientific measurements are made they are reported using: Select one: a. all certain digits…

A: Scientific measurements are done to get the accurate result . Hence when the report it , it is done…

Q: The density of a metal is 8.67 g/cm. How many pounds are in 298.86 in of the metal? (You can use the…

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Q: When a measuring scale is used properly to the limit of precision, the least significant digit…

A: Note - There is a word error in your question, i.e., least should be replaced by last. Taking it…

Q: What are the apparatus used to measure objects? What are they measuring (ex. Ruler measures the…

A: There are many apparatus used for measuring objects like for measuring length of an object,…

Q: A student measures the length of an object and obtains 3.65 cm. If thr true value (as reported by…

A: Given, Measured value = 3.65 cm True value = 3.75 cm

Q: A student sets up the following equation to convert a measurement. (The ? stands for a number the…

A: Given number : 73. V/m  V/m = volte per meter  0.01m = 1cm

Q: For the laboratory equipment below give me the name, what it is used for, minimum measurement in mL,…

A: The apparatus is given that is used in laboratories, laboratory equipment is defined as an apparatus…

Q: When a measuring scale is properly to the limit of precision, the last significant digit recorded…

A: There is no a perfect machine.However,for very precise equipment,the margin is a very small number.…

Q: 15 | he individual markings of a0-milliliter graduated cylinder are a of a apart. This allows one to…

A: A graduated cylinder is a standard instrument used to measure the volume of reagents in…

Q: Conversions involving units raised to a power: include the correct number of significant digits.…

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Q: 1. Approximately, what is the percent uncertainty in the measurement 3.70 + 0.25m? 2. Convert 1.57m…

A: 3.70+/-0.25m this the range is from 3.70-0.25 to 3.70+0.25 i.e. 3.45 to 3.95 respectively the…

Q: Correct! Now, determine the uncertainty value for the measurement. 7.48 ± A mL 7 SUBMIT UNCERTAINTY…

A: Uncertainty is the half of the smallest possible measurment that can be made with that glassware.

Q: Unfortunately, the student may have made some mistakes. Examine his results carefully and tick the…

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Q: Given

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Q: In the experiment on determining the density of liquids, a pycnometer was used. The volume of the…

A: A pycnometer is used for measuring the volume and the density of liquid .

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.