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

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: express this volume in cubic inches.

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

Q: Explain why measurements are never exact.

A: The act of the measuring the size of an object is known as measurement. It is numerical…

Q: A substance with a density of 2.70 g/ml occupies a volume of 21.3 mL. What is the mass of the…

A:

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: Write the two conversion factors that can be written forthe relationship between cm and in.

A: Units of measurement are defined as the fixed magnitude or quantity that can be defined and adopted…

Q: 532 mi/s2 to cm/hr2

A:

Q: 1523.789 mm3 / 4.018 cm2 =   ____________ inches

A: 1523.789 mm3 / 4.018 cm2 =   ____________ inches

Q: 0.009 hm %3D cm 1.0023 dm = hm 0.2203 daL = µL %3D 515 cm = km

A:

Q: What is the numerical value of a conversion factor ?why must this be true ?

A: Numerical value of a conversion factor is answered in the next step.

Q: Is it possible for measured data to be precise but inaccurate?

A: Here we have to explainIs it possible for measured data to be precise but inaccurate-

Q: Which is NOT a quantitative measurement of a pencil?A. lengthB. massC. colorD. diameter

A: The one that is not quantitative measurement in pencil has to be given.

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: measurements of mass and volume so important in chemistry

A: Concept Introduction :   Chemistry : the branch of science which deals with the substances of which…

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: Express 3.78 m³ in units of cm³.

A:

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: Differentiate between Precision and Accuracy?

A: Solution :    Accuracy and precision play a very important role in determining the measurement of an…

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: Type the answer derived from the following dimensional analysis setup. Be sure to round your answer…

A: ML =1.5 x 1021 L x 1 ML ÷ 106 ML = 1.5 x 1021-6 ML

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: How are conversion factors used to convert one unit to another?

A: In order to convert one unit to another, we need a definite number which is called as the conversion…

Q: When subtracting or adding two numbers in scientific notation, why do the exponents need to be the…

A: To find: The reason for exponent to be same when adding or subtracting two numbers in scientific…

Q: 1.42 g/cm² to mg/mm?

A: (13) Consider the given conversion is as follows;         1.42 g/cm2   to   mg/mm2…

Q: When multiplying or dividing measured quantities, what determines the number of significant figures…

A: The significant figures of a number written in positional notation are digits that carry meaningful…

Q: Unit conversions: How to do I convert 5(kg/hr)/3120(mg/L) to a measurement in (m^3/hr)?

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: Why is it incorrect to say that the results of the measurement were accurate but not precise

A: While measuring any unit we work to meet the accuracy that means how close the measurements done to…

Q: When the calculation (0.005215)(0.08212)(273.2)/ (4.1) is performed, the answer should be reported…

A: Rules of multiplication and division of Significant figures : In multiplication and division…

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: 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: What are the two unit factors that relate meters and millimeters?

A: Two equivalent quantity’s ratio is unit factor. So the quantity in the numerator and denominator…

Q: How should a 10 mL graduated cylinder be read and why?

A: Graduated cylinders are widely used to measure liquids/solvents. Small graduated cylinders such as…

Q: 3. Why did you classify the properties that you observed as physical, extensive, intensive, or…

A: Since you have posted multiple question, as per our company guidelines we are supposed to answer the…

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: How many square centimeters are there in 1 hectare? Express your final answer in scientific…

A: 1 hectare = 10,000 M2

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: What are the basic four units of measurements?

A: These are the following basic units:

Q: Water Volume Water Volume Object Volume Without Object (mL) With Object (mL) Object (mL) Nut 20 23

A: Volume of object can be calculated as  = Water volume with object - water volume without object

Q: When adding or subtracting measured quantities, what determines the number of significant figures in…

A: The result of an addition or subtraction should be reported to the same number of decimal places as…

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: Why is it important to know how to convert from one unit to another? Provide an example in which you…

A: A unit  of measurement  is definite magnitude of quantity  and it is defined and adopted by…

Q: define Conversion Factors

A:

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

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.