Q.1. A student obtains the number 0.40076 on a balance. 4.00 x10 If this number actually has (3) significant figures, how should it be written? 0.400 0.4007 0.401

Q: You and some friends plan a road trip across country. The total distance is 2105 miles. Your car…

A: Total distance is = 2105 miles The car travel in a gallon is = 33 miles/gallon The cost of fuel is =…

Q: A scale used to weigh produce at a market has markings every0.1 kg. Which measurement for the mass…

A: A scale used to weigh produce at a market has markings every 0.1 kg. Which measurement for the mass…

Q: 1. When expressed as 7.5x10^4, only the significant figures of are to.be considered. (1 point) O 7.5…

A: The notation of digits written in a format is called significant number.Typically after decimal four…

Q: II 8TIIL! US ng TaUie 2.9 UI page II II your tCxID0OK, IUchtIly tne 3U03UICC. USIlng 245a l,20 7Lx…

A: Methyl mercury levels higher than 3.00×10-4 mg/dL are toxic to central nervous system. Whether the…

Q: In the product A ∙ B ∙ C, A has 5 significant figures, B has 3 significant figures, and C has 4…

A:

Q: The density of a metal is 8.67 g/cm3. How many pounds are in 298.86 in of the metal? (You can use…

A: The relation between mass, volume and density is : density = mass / volume or, mass = density x…

Q: In the lab a student measured the density of an Aluminum cylinder to be 2.89 g/cm3. The handbook…

A: Density is a physical quantity that can be determined with the help of the mass and volume of the…

Q: 2. Complete the blanks in each row as in the first: a) underscore the last significant figure in the…

A: Solution: We have three rules for significant figures 1.Non-zero digits are always significant. 2.…

Q: If the radius of the sun is 7.001×105  km, what is the average density of the sun in units of grams…

A: Density can be calculated as: Density=MassVolume

Q: What of these, if any, is/are a correct representation(s) of a number in scientific notation? Sele…

A:

Q: The product of 79.7 m x 9.31 m is m2. Express the answer with the correct number of significant…

A: Answer: 742 m2

Q: To how many significant figures should each answer be rounded? (6.626 x 10-34 J . s) (2.9979 × 10°…

A:

Q: an object hass a mass of exacty 5g on an analytical balance that has an accurary of 0.1 mg , to how…

A: Accuracy of analytical balance is 0.1 mg. Conversion of unit from mg to g is,

Q: How many significant figures are in the number 9.540x107?

A: The given number is = 9.540×10-7

Q: Crude oil is sold in units of barrels, where 1 barrel = 160 liters. Assume that crude oil has a…

A: Given : Density = 823kg.m-3  Volume = 1 barrels

Q: Decide whether each proposed multiplication or division of measurements is possible. If it is…

A: Multiplication or division of same units are possible. To do the given operation, first step is to…

Q: Very large and very small numbers are easier to write in scientific notation. For example, the…

A: Exponential notation for a number can be written in such a way that large numbers are written in…

Q: Determine the number of significant figures. 1. 100432.6783 / 2 2. 0.000004523 x 2.34 + 10.00000…

A: To determine the significant number, we need to count significant number in given values and then we…

Q: How manny aspirin tables can be made from 100.0g of asprine, if each tablet contains 5.00 grains of…

A: Numbers of aspirin tablets that can be made from 100.0g of aspirin are to be calculated, if each…

Q: What is the density of an object of mass 45.00 g and volume 25.0 mL? 1._______ / 2.________ =…

A: Given: Mass of object = 45.00 g And volume of object = 25.0 mL.

Q: Carry out the following mathematical operations and answer the questions that follow. 33.916 x 95.7…

A: The significant figure refers to particular digits in a number. According to the measurement rule,…

Q: Write 3.280x104 J as a normal, decimal number without any scientifc notation. Pay attetion to…

A: Correct option is C. 0.0003280 J.

Q: C. The Q4. Which of the following has the same number of significant figures as the number 1.0310?…

A: Significant figures of a number in positional notation are digits in the number that are reliable…

Q: 7.64x1020 H2O2 molecules Express your answer using three significant figures. m =

A: Since  1) Find the number of moles present in each of the given substance. 2) Multiply the number…

Q: what measurement is a pikofarad ?

A: Farad is the S.I unit of electrical capacitance and is a measurement of the ability of an object to…

Q: A typical office has 144 ft2of floor space. Calculate the floorspace in m2(use the proper number of…

A: While converting from 1 unit to another of same dimension a conversion factor is to be multiplied.

Q: A surveyor measures the length of a surveying chain containing 1000 chain links. The length is…

A: Length is first converted from kilometers to centimeters.

Q: How many significant figures are in the number 9.540x10*7?

A: Significant figures in 9.540*10^-7  = 4(four significant figures are there) . 0.00000009540 =…

Q: A 1995 penny having a mass of 2.931 g is cut to expose the zinc and dropped into sulfuric acid.…

A: The mass of the given penny is = 2.931 g The mass of the copper shell is = 0.059 g The mass of zinc…

Q: 1.10 (a) How many significant figures should be reported for thevolume of the metal bar shown here?…

A: Since 2.5 cm has only two significant numbers, the volume is reported in 2 significant figures.…

Q: Two undefined numbers expressed in regular notationare s hown below, along with the number of places…

A: Scientific Notation: In science when the number is too large or too small to perform any…

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

A: Since, we know that ;  1 kg = 103 g  1 m = 102 cm

Q: An individual weighs 81.4 kg and is 1.78 m tall. (a) What is the person's equivalent measurement in…

A: (a) Given that the person's weight is --- 81.4 kg We know, 1 kg = 2.20462 Pound Or, 81.2 kg = (81.2…

Q: How many significant figures does the number 5.0000 have

A: Significant figures can be defined as the number of required digits to show the required level of…

Q: 4- Perform the following calculation and report the result to the correct number of significant…

A: The correct option is D i.e 2.8  as we significant upto 2 decimal places then 2.81690 = 2.8

Q: The number 9.40548 rounded to 2 significant figures is

A: The number 9.40548 rounded to 2 significant figures is

Q: The number 4861.850 rounded to 3 significant figures is

A: If any number give in more digit and we have to write in less significant figures use power method…

Q: How many significant figures are in 9630.0010? (numerical answers only) N

A: Given,  How many significant figures are in 9630.0010 ?

Q: A liquid has a density of 1.27g/mL. What is the mass of 20.0mL of this liquid? Show all required…

A: A liquid has a density of 1.27g/ml. A liquid has a volume of 20.0mL. Mass=?

Q: After carrying out the following operations, how many significant figures are appropriate to show in…

A: We have to predict the number of Sig figs in result.

Q: How many significant figures are in the number 6.455x108?

A: Significant figures is termed as the total number of digit in a number including the last digit wose…

Q: How many significant figures are in the following: c.) 0.00145 d.) 100365 e.) 1.20 x 10² f.)…

A: Significant figures in the given data are determine using following concepts :-  1) All non-zero…

Q: 2. Complete the blanks in each row, as in the first: a) Find and underscore the last significant…

A:

Q: Use the first menu to select the type of measurement represented by the unit. Use the second menu to…

A: Significant figure are used in calculation and to  measure and contribute more accuracy in…

Q: A medical lab technician measures the mass of cholesterol in a blood sample. The mass is 6.04 × 10 -…

A: We know, 1g = 106μg

Q: The number 8.07 x 10 3 has significant figures.

A: Significant figures:-  It is basically a measure of accuracy and precision.

Q: A sample that has a mass of about 25 g is weighed on a balance that has a precisionof 0.001 g. How…

A: The mass of sample with a precision of 0.001 g is in between 24.999 g and 25.001 g

Q: How many significant figures does the number 1.030x10^7 have?

A: Answer

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.