When scientific measurements are made they are reported using: Select one: a. all certain digits plus two uncertain digits b. all certain digits plus one uncertain digits c. all certain digits plus no uncertain digits d. all certain digits plus all uncertain digits

Q: 34. Use exponential notation to express the number 385,500 to one significant figure. b. two…

A: (34) Exponential notation is also known as scientific notation. It is a convenient way to write…

Q: When a very large number is written in scientific notation shut the exponent be a positive or a…

A: Scientific notation: Scientific notation is a way of expressing numbers in decimal form with…

Q: Precision refers to A) how close a measured number is to other measured numbers B) how close a…

A: The value which is close to the measured value is known as accuracy.

Q: Convert this unit into an si unit with the basic unit L (up to 3 significant number)

A: The volume of 28.32 L approximately equal to 1 ft3.

Q: State the temperature on the Celsius thermometerB to the correct number of significant figures:

A: Significant figures are the digits of number that are accurate and more reliable value of data.…

Q: 21. Write the conversion factor that converts a measurement ininches to feet. How does the…

A: As the length measures in feet and inches. The conversion used to convert inches to feet is as…

Q: Look up the measurement of the approximate thickness of a human hair.a. Convert the measurement to…

A: (a)

Q: Number

A: A) use stoichiometry of the reaction to get mass of methanol.

Q: Chapter 1 Item 10 Use appropriate metric prefixes to write the following measurements without use of…

A: The given value is written with approximate metric prefix without use of exponents in step two.

Q: How do you find density in an object

A: The density of an object is defined as a mass of a unit volume of the substance.

Q: c. Using the measurements from part a. and b., calculate the density (p) of the water in the beaker.…

A: "Since there are multiple questions and it is not mentioned that which one has to be solved so I am…

Q: 42.8 grams of zinc shot is added to 15.8 ml of water in a graduated cylinder. the water level rises…

A:

Q: A cylinder of gas has a volume of 7.250 L.  Convert that volume to quarts (qt). Express your answer…

A: A numerical problem about conversion of Liter into quarts, which is to accomplished.

Q: A kilogram of lead occupies a much smaller volume than a kilogram of water, because which has a much…

A:

Q: 131. Look up the thickness of a human hair. (a) Convert it to an SI standard unit (if it isn't…

A: As you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: 17. What is the mass of an object that has a density of 0.23 g/cm and whse volume is 52 cm?

A: As requested, the solution of question number 17 is as follows: Given:  Density of substance=…

Q: A supposedly gold nugget displaces 14.4 mL of water and has a mass of 276 g. Part A Calculate the…

A: Density basically expresses direct proportional relation with mass whereas inversely proportional…

Q: What is the estimated digit? A measurement done with no tools A digit added by the operator beyond…

A: in a measurement, the last digit is called an estimated digit.

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: Part C to heat 34.2 g of copper from 122° C to 227 °C Express your answer using three significant…

A: Heat required for raising the temperature of a substance of mass m from one point to another can be…

Q: Express your answer to two significant figures and include the appropriate units. HẢ Value Units m =

A: Answer :  Mass of silver= w (let) Molecular weight of silver (M)= 107.86g No. Of electron transfer…

Q: Object 1 from an experiment contained a mass of 23.85 g and a volume of 8.84 mL determined through…

A: Given,Mass of the object = 23.85 gVolume of water displaced by the object = 8.84 mLThe density of…

Q: easured to be 4.93. Round your answer to 2 significant digits.

A: [H+] = 10^-pH  [H+] = 10^-4.93 [H+] = 0.0000117M

Q: 1(a) Convert the number 0.0000735 to scientific notation. (b) Round off the number 24.15725 to the…

A: Applying concept of scientific notation and significant figures.

Q: Significant digits give information about (select all that apply) a. The results of an experiment.…

A: Significant digits are all the digits of experimental data that are required to express without…

Q: Solve for: 146.381 mL -31.4 mL= report answer to the correct number of decimal places and include…

A: Significant figure represents all the digits of a number that are significant with respect to…

Q: A 75.4 g graduated cylinder has a mass of 94.8 g when containing 17.7 mL of a liquid. Calculate the…

A: Mass of a substance refers to the amount of matter present in the given substance. It is measured in…

Q: I wants to know the formula Of density measure

A: Density = Mass of substanceVolume of substance

Q: Round the following to three sig figs.  Express your answers as either whole or decimal values; do…

A: Significant Figures: Defined as  by saying that  the numbers which gives meaningful contribution to…

Q: Match the unit abbreviation with the quantity being measured cm mL g/mL C bb mol °℃ atm [Choose]…

A:

Q: A piece of metal with a mass of 26.7 g was dropped into a graduated cylinder containing 17.00 mL of…

A: The density is the ratio of mass to volume. Thus, it is expressed as shown in the equation (1) in…

Q: What type of data must be plotted on a graph for the slope of the line torepresent density?

A: Density: It is defined as mass of substance present in per unit of volume. SI unit is g/cm3.

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: A D B.

A: When zn Reacts with HCl -->H2 gas is liberated . And with the help of Eudiometer,the volume of…

Q: 10) Solve each problem and report your answer to correct significant figure and units. Remember that…

A: 244.15 kg 18.36 ml 152.5 cm 0.4049 g/cm3 11.5 lb.ft/gal 3.488 × 106 mg/cm3 1.761 × 102 nm 1.987 ×…

Q: Perform each unit conversion.a. 28.9 nm to mm                     b. 1432 cm3 to L                c.…

A: Given conversions,       a. 28.9 nm to mm                            b. 1432 cm3 to L…

Q: Two reasons to write a number in scientific notation are when it is either very big or very small.…

A: scientific notation was developed to easily represent numbers.

Q: The accuracy of a measured va error. Percent error is a comm the true value (TV): Accurate…

A:

Q: 16. A mixture is made by adding 20.42 g of substance A, 1.322 g of substance B, and 83.1 g of…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: If the mass of an empty 9.7 ml pycometer is 10.1 nd the mass of the same pycometer with an unknown…

A:

Q: = new temperature c The correct number

A:

Q: A α 1/B means: A. A is directly proportional to B B. A is inversely proportional to B C. None of…

A: In the given question we have to define the following notation.          A  ∝  (1/B)  this means the…

Q: A piece of indium with a mass of 21.93 g is submerged in 46.3 cm3 of water in a graduated cylinder.…

A: Given,Volume of water without indium piece = 46.3 cm3Volume of water with indium piece = 49.3 cm3∴…

Q: use data to discuss whichc calculated density is more accurate.

A: Density is obtained by dividing mass by volume Density(d) = mass(m)Volume(v) => m = d*v (or) v =…

Q: I digits. You may assume the temperature

A:

Q: A flask containing 11.7mL of a liquid weighs 132.8g with the liquid in the flask and 124.1g when…

A: The ratio between mass and volume or mass per unit volume is considered as density. The formula for…

Q: temperature in C.

A: Given : Temperature = 122F

Q: One edge of a cube is measured and found to be 13 cm. The volume of the cube in m to the third power…

A: Given- Edge of the cube - 13cm To calculate- Volume of the cube Formula- Volume of the cube= a3…

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.