Explain why measurements are never exact.

Q: Lavoisier developed a new theory of combustion that overturned the phlogiston theory. What…

A: Antoine Lavoisier was a French based scientist whose research was consisted of quantitative…

Q: write UNITS OF MEASUREMENT

A: The SI system, also called the metric system, which is used around the world.

Q: Why is it important to always include units when recording measurements?

A: It is important to always include units when recording measurements.

Q: What kind of situation in which you might need to convert the units of a measurement ?

A: when describing size of macro units we use units like grams, kilograms.When describing size of micro…

Q: Can a set of data be accurate but not precise?

A: Yes, to some extent. This direction is more involved. Let’s use the example of direction (1) but…

Q: Why are repeated trials of the same measurement desirable

A: Repeated trials means measurement of same  data repeatedly.

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: Why must a measurement include both a number and a unit?

A: It is very important to specify the measurements with both a number and a unit. A measurement…

Q: why it is important to use significant figures in measurement? What is an example of significant…

A: Significant figures/significant digits form an important part of mathematical and scientific…

Q: What is the meaning of the number of digits reported in a measured quantity?

A:

Q: Lavoisier developed a new theory of combustion that over-turned the phlogiston theory. What…

A: Lavoisier developed a new theory of combustion and disproved the phlogiston theory. Lavoisier…

Q: Which weight would you expect to be suitable for weighing on an ordinary bathroom scale

A: An ordinary bathroom scale can be measured in kg.

Q: 1.16 × 10¬8 s to nanoseconds Express your answer to three significant figures and include the…

A: Given, To convert 1.16 × 10-8 s to nanoseconds

Q: Enter all measured data, and certain final answers to the correct number of significant figures as…

A: In this question, the values of the following are given with the correct number of significant…

Q: Write a brief explanation about importance of measurements in chemistry.

A: Accurate, precise measurement is a fundamental component of good science. For this reason,…

Q: Arrange the measurements from longest length to shortest length.

A: 1 km > 1000 inch > 10 yard > 250 cm Explanation All the values are at first converted into…

Q: What Is Derived units?

A: A derived unit is a unit that results from a mathematical combination of SI base units.

Q: O MEASUREMENT Multiplication and division of measurements

A: General Rules: For addition and subtraction, the same quantities or the quantities which can be…

Q: Explain the difference between precision and accuracy.

A: The standard unit of measurement is easy to understand by everyone as it gives the measurement ease…

Q: Convert 460.3 ml to quarts. Express your answer with the correct number of significant digits.

A: Since we know that 1 milliliter (ml) = 0.001056688 quart (qt). Where ,  Milliliter (ml ) is a unit…

Q: e) 248 cm to millimeters

A: We have to predict the value in millimeters.

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: Which weight would you expect for weighing on an ordinary bathroom scale

A: Ordinary bathroom scale has a range – 1 kg to 140 kg

Q: Distinguish between the terms accuracy and precision.In general, explain why a precise measurement…

A: To find: Difference between the terms accuracy and precision. Explanation for why a precise…

Q: Why are significant digits important when taking data in the laboratory?

A: Significant figures are used to express the degree of accuracy of an answer.

Q: How many 1 cm squares would it take to construct a square that's 1 m on each side?

A: Area of square is as follows,

Q: e length

A:

Q: mass of nitrogen, in kg? x10-26 kg. (Round to two decimal places.)

A:

Q: Measurements are said to be precise. Explain why?

A: The precision of a measurement is defined as the degree of closeness of the multiple set of readings…

Q: Question is attached

A: Measurement: It is the process of assigning the numbers to the characteristic of any substance that…

Q: The density of a substance relative to the density of water.  It is one of the few measured values…

A: The density of any substance is mass by volume. Density=massvolume The unit of mass is Kg and the…

Q: 2.04 pm to meters Express your answer to three significant figures and include the appropriate…

A: For a number in scientific notation: N x 10x, all digits comprising N ARE significant.

Q: How to convert grams to millimetres? And grams to centimetres?

A: Gram is a unit of measurement of weight. Centimeter and millimeter are unit of measurement of…

Q: The are the markings on an instrument that represent the highest accuracy that the instrument can…

A: In chemistry, there are many ways to check the deviation of experimental data from the accurate…

Q: What are the basic four units of measurements?

A: These are the following basic units:

Q: (24.2)(0.0025)(6.023•10^4)= Determine the number of significant digits that would be in the answer…

A: Significant figures are used to show  the degree of accuracy of any given answer. The rules for…

Q: Converting units of measurements

A: The measurement units can be converted to each other with the help of dimension analysis method.

Q: Explain why standard units of measurement are particularly important to scientists.

A: HERE ARE SOME REASONS:

Q: Which is a more accurate volume-measuring instrument, a graduated pipet or a graduated cylinder?…

A: Liquid volume is usually measured using either a graduated cylinder or a buret. As the name implies,…

Q: Why is it incorrect to say a measurement is accurate but not precise

A:

Q: Explain the difference between density and mass.

A: The mass of substance is same all over the universe because it is measured as the amount of matter…

Q: 7.90 kilograms (Kg) to pounds (Ibs)

A:

Q: alüminum atom has a mass of 4.48 × 10 g and a small airplane has a mass of 5000. kg. e this…

A: We are given mass of one atom and we have to find mass of one mole and calculate how many moles can…

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: Convert 2.3miles/hour to ft/sec. Express you answer with the proper significant digits.

A: 1 mile is equal to 5280 feet 1 hour  is equal to 3600 sec

Q: Give one example of measurement from around your house.

A:

Q: Round your answer to 2 significant digits. -1 k = ?

A: The question is based on the concept of chemical kinetics. we have to make use of arrhenius equation…

Q: kg 0.0097 3 3 cm m

A: We know that  1 kg = 1000gm that means  1 gm = .001 kg  1 m = 100cm  1 cm = .01 m

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.