Suppose you are asked to find the area of a rectangle that is 2.1-cm wide by 5.6-cm long. Your calculator answer would be 11.76 cm2. Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round your answer to two significant figures, your answer will fall outside of the grading tolerance and be graded as incorrect.) Enter your answer to two significant figures and include the appropriate units.

Q: express this volume in cubic inches.

A: We have,          1 L=1000cm3        and 1 inch =2.54cm.

Q: What type of quantity (for example, length, volume, density) do the following units indicate? (a)…

A: Units: A fixed amount used as a standard of measurement. For example, for the measurement of mass,…

Q: If I have a measurement of a diameter using a ruler with increments in mm: 1.70cm diameter then…

A: For multiplication and division: The least of significant figures in any number of the question…

Q: Question attached

A: we have 4 significant figure. For round up, we can take +1 value for greater than 5.…

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

A: we need to convert from N/cm to N/mm

Q: Using a graduated cylinder, you measure out 250 mL ethanol, which has a density of 0.789 g/mL You…

A: Concept based on the calculation of mass of ethanol from its density and volume. Density =…

Q: Finally, sometimes the desired value does not directly match the units given but is derived from the…

A: Given: The volume of a sheet of metal = 45.5 cm3 Width = 14.8 cm Length = 15.9 cm

Q: Calculate the total volume, given that the three volumes shown below were combined into the same…

A: We can solve this problem by converting all three volumes in same unit litter.

Q: The diameter of a copper (Cu) atom is roughly 1.3 x 10-10 m. How many times can you divide evenly a…

A: Given :- Length of copper wire = 10 cm Diameter of wire = 1.3 × 10-10 m

Q: Perform the following mathematical operations, and express the result to the correct number of…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: What is the speed of light in miles per second? Express your answer in scientific notation. The…

A: Given: The speed of light in m/s is 299,792,458 m/ s.

Q: A student needs to determine density of a liquid. The student determines mass of an empty flask to…

A:

Q: The average adult heart pumps about 84. mL/s of blood at 72 beats per minute. Suppose you need to…

A: The pumping efficiency of heart is 84 mL/s means it takes 1 second to circulate or pump 84 mL of…

Q: A cheetah ran 1000.0 meters in 33.27 seconds, how fast is it running in miles per hour (MPH)? Note:…

A: Given information: 1 miles = 1.609 km              = 1609 m 1 hour = 3600 sec

Q: mol aqueous L A chemist must prepare 875. mL of 10.0 mM aqueous calcium sulfate (CaS0,) working…

A: On dilution, the concentration of solution decreases but the number of moles remain constant. Write…

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

A:

Q: O MEASUREMENT AND MATTER Setting up the math for a one-step quantitative problem Suppose you need…

A: The mass of 70 tow chain = 2.16 kg/m

Q: The diameter of an atom is approximately 1 x 10-10m. What is the diameter in millimeters? (Hint,…

A: Given, the diameter of an atom =1×10-10 mwe are asked to convert this into milimeters.

Q: In determining the density of olive oil (see Table 2.2), one student took exactly 25.00 mL and found…

A: (Note: Table 2.2 is not posted in the question. Densities are calculated based on the given data.)…

Q: A student sets up the following equation to convert a measurement.

A: Unit converstions :  1. mole unit conversion:    1 mol = 103 mmol        where mmol stands for…

Q: A beaker is marked with 1mL lines for measuring volume. It is then filled with water such that the…

A: When we fill a container with a liquid, it generally forms a lower and an upper meniscus. The…

Q: When converting from kilometers to centimeters how many places does the decimal move to the right?…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: Using significant figure rules, the answer of 213 miles / 4.2 hours is equal to which of the…

A: In Multiplication and Division, The LEAST number of significant figures in any number of the problem…

Q: The radius of a copper (Cu) atom is roughly 1.3x10−10 m. How many times can you divide evenly a…

A: The length of the two pieces of copper wire obtained after the final cut (which contain one copper…

Q: The beakers shown below have different precisions. a. Label the amount of water in each of the three…

A: Three different beakers are shown in the picture with different precision.

Q: The density of iron is 7.87 g/mL. What is the mass of a 4.00 cm × 4.00 cm × cm × 1.00 cm block of…

A: given density = 7.87 g/ml cross section = 4.00 cm × 4.00 cm × 1.00 cm

Q: A chemistry student weighs out 0.441 g of citric acid (H,C,H,0,), a triprotic acid, into a 250. mL…

A: Here we first calculate the molarity of the acid then use neutralization rule at equivalence point.

Q: There are exactly 60 seconds in a minute, exactly 60 minutes in an hour, exactly 24 hours in a mean…

A: 60 smin ×60 min1 hour ×24 hour1 day ×365,24,daysolar year  =31556736 s/solar year

Q: What type of quantity (for example, length, volume, density)do the following units indicate? (a) mL,…

A: Conversion factors are used to convert different units into each other through dimensional analysis…

Q: How can you tell what numbers are exact, and which are measured? For example, one mile, one meter,…

A: Exact numbers cannot be simplified and have an infinite number of significant figures. Measured…

Q: The weight of a metal sphere was measured to be 9.81 g. Unfortunately, the caliper that was supposed…

A: Given : weight of a metal sphere = 9.81 g  Density = 7.26 g/cm3 To find : Radius of metal surface…

Q: What is the mass, in grams, of 150 mL of liquid iron if its density is 7.874 g/cm3? Make sure to…

A: The density of a substance is equivalent to the mass of the substance per unit of its volume.

Q: GenAlex Medical, a leading manufacturer of medical laboratory equipment, is designing a new…

A:

Q: Horse height is measured in hands, one hand equaling exactly 4 inches. If a horse is 15.5 hands…

A: The unit conversion method can be used here.

Q: The average adult heart pumps about 84. mL/s of blood at 72 beats per minute. Suppose you need to…

A: Given that : Rate of volume of blood pumping = 84 mL/s The volume of blood to be circulated = 5100…

Q: Give an accurate word definition of the term “density”.     Is density a physical property or a…

A: Density is defined as the mass of any substance present per unit of volume. => Density = Mass of…

Q: If the Moon is 246,000 miles from Earth, what is the distance in kilometers? (Given: 1 mile = 1.61…

A: The conversion used to do this problem is shown below: 1mi=1.61 km

Q: GenAlex Medical, a leading manufacturer of medical laboratory equipment, is designing a new…

A: Given that , The volume of blood sample ,             = 2uL             =2 x 10-6 L

Q: The average adult heart pumps about 84. mL/s of blood at 72 beats per minute. Suppose you need to…

A: The average rate of blood pumping by adult heart at rate of 72 beats per minute is 84 ml/s. The rate…

Q: In the lab, a student determines the density of a metal object by measuring its mass on a balance…

A: Calculate the volume of the object:

Q: . You are an athlete weighing 78 kg. If you are required to lose 9 kg, what would your final weight…

A:

Q: For each of the following numbers, determine the number ofsignificant figures it contains, rewrite…

A: (a) 3.050 × 10–4 can be written without scientific notation as 3.050/104 =0.0003050 has four…

Q: Suppose you are trying to find the volume of a box based on the given measurements for the length,…

A: According to the rule for significant digits in addition and subtraction, the number of significant…

Q: Using the listed equalities, convert the following numbers to different units. Make sure that you…

A:

Q: Sodium Chloride was placed in a beaker and the beaker and the sodium chloride together had a mass…

A: This problem is based on the simple additive properties of mass. Mass of a system is equal to the…

Q: Because of the high heat and low humidity in the summer in Death Valley, California, a visitor…

A: Given that, 1 quart = 0.946 L 1 mi = 1.61 km 1 g water = 1 mL water

Q: In an experiment regarding measurements and significant figures, one student weighed an object using…

A: The student used a triple-beam balance for the measurement.

Q: The radius of a copper (Cu) atom is roughly 1.3 ×10−10 m. How many times can you divide evenly a…

A: The length of the two pieces of copper wire obtained after the final cut (which contain one copper…

Q: Is it possible for a calculated answer from an addition or subtraction problem to contain more…

A:

Q: A student is asked to make up a 16% sodium chloride solution. She makes the solution by weighing an…

A: Given :  Weight of empty beaker = 98.5 gm  Weight of the beaker and sodium chloride = 114.71 g…

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.