Express the answer to the following calculations in proper number of significant figures. 154.29) 1.5 ... 3.29 x (0.234 - 0.73)

Q: State the rules governing the use of significant figures in Adding/subtracting measurements.  How…

A: Significant figures are the digits having a meaning in a given number. The number of decimal places…

Q: Express the results of the following calculation in scientific notation 0.0121 cm to the power of 2…

A: Scientific notation is a method of writing a very large and small numbers.

Q: A large stone weighs 53.0 kg, how many pounds does it weigh?

A: Given: Mass in Kg = 53.0 Kg.

Q: The answer to   (315.8 g + 4.52 g)  has how many significant figures?

A: In this question, we will find out the number of significant figures in the final answer.…

Q: Express the number 554,780,000,040 in scientific notation to three significant figures.

A:

Q: 2. A nurse measured the average heart beats of a patient and reported to the doctor in terms of time…

A: The time period of patient patient heart beats = 0.8 s  Number of heart beats formed in a minute = ?

Q: A piece of copper has a volume 300 L. What is the mass of the sample, in units of grams? Fill in…

A: the Red box is filled as shown below:

Q: The mass of an object was found to be 28.90 g. When this object was dropped in a graduated cylinder…

A: Given, mass of object =28.90 gramthis object was dropped in a graduated cylinder partially filled…

Q: You record the following in your lab book: a liquid is thick and has a density of 4.58 g/mL. Which…

A: Given data, A liquid is thick and has a density of 4.58 g/mL. Which data is qualitative and…

Q: What is the volume and thickness of the aluminum foil given 0.405g (mass), 9.5 (length), 9.6…

A: Given:   The mass of aluminum foil is 0.405 g. The length of aluminum foil is 9.5 cm. The width of…

Q: The volume of gold idol is approximately 1.0L. The density of gold 19.3 g/ml. When gold idol is…

A: Given - Density of gold = 19.3 g / ml Mass of gold idol = 16.5 kg Volume of water displaced = 954 ml…

Q: If 12.87 mL of a salt solution weighs 13.357 g, what is the density of the salt solution?

A: The relation between mass, volume and density is as follows : Density = mass/volume

Q: What is the difference between an exact number and an inexact number? Give an example of each type…

A: The arithmetic numbers can be categorized into two categories: exact and inexact numbers. These…

Q: The volume of sea water present on the Earth is about 330,000,000 cubic miles.  Since sea water…

A: Converting cubic miles to cubic centimeters, as 1 cubic mile = 4.168×  1015 cm3 Thus 330,000,000…

Q: 7. The speed limit on a road in Mexico is 90 km/hr. What is this speed equivalent to in miles per…

A:

Q: 1. The radius of a potassium atom is 0.227 nm. Express this radius in the unit centimeters.   2.…

A: In the given question, conversion of the given length measurement.

Q: express the following using scientific notation the size of sand is about 0.000002m A plastic…

A: The scientific notation can be defined as the way of representing a very small or a very large in…

Q: Round each number to two significant figures  233.356       0.002353.   can you please…

A: Interpretation : We have to count number of significant figures.

Q: Can you help me understand what a significant figure is and help me with this problem?  46.97  How…

A: The digits which carry meaning supporting to its measurement resolution is called as significant…

Q: A    bullet    recovered    from    a   crime    scene    has   a   mass    of    9.68    g.    A…

A: .357 Magnum is a low velocity cartridge. The .357 is to some extent reliant on mechanical wounding…

Q: Super fine 40-gauge copper wire has a diameter of only 0.080 mm and wei wire is pulled off to wind a…

A: Given: Diameter of the gauge is 0.080mm The weight of the gauge is 705.g The weight was reduce due…

Q: A sphere of pure iron metalcontains 9.57 x 1024Fe atoms. What is the radius of the sphere in…

A:

Q: 3.8060 × 13.1 = x O 26162

A: From the rules of significant figures.  In multiplication and dividation.  The answer will have the…

Q: In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the but…

A: Density can be calculated by using its relation with mass, and volume.

Q: How do you fint the volume of an element, given the density and mass.  For example, "Determine the…

A: The volume of an element can be calculated from the given below formula if its density and mass are…

Q: Super fine 40-gauge copper wire has a diameter of only 0.080 mm and weighs only 44.5 g/km. Suppose a…

A: Diameter of the wire = 0.080 mm Weight of wire per km = 44.5g   Weight of wire used to wind a magnet…

Q: A star is estimated to have a mass of 2.0 ✕ 1036 kg. Assuming it to be a sphere of average radius…

A: Given : Mass of star = 2.0 X 1036 Kg  And radius of sphere = 7.2 X 105 Km Since 1 Km = 1000 m  And 1…

Q: A student find an irregular metal object. Student wanted to know the identity of this metal. As a…

A: Metals are opaque, lustrous elements that are good conductors of heat and electricity. Most metals…

Q: 4. The density of mercury is 13.6 g/mL. Express this in kg/L . 5. How many drops of liquid are in a…

A: A question based on dimensional analysis, which is to be accomplished.

Q: To measure the volume of an irregularly shaped object, one must measure the volume of water it…

A: As the volume of the chunk of copper = volume of water displaced by it The volume of the chunk of…

Q: 3) If 8.15 mL of water is placed in a graduated cylinder (mass of empty cylinder = 56.98 g), and the…

A: Answer : Mass of water  = mass of both the cylinder + water -  mass of empty cylinder density  =…

Q: A technician used a section of glass tubing to measure the density of   a liquid. The inside…

A:

Q: Super fine 40-gauge copper wire has a diameter of only 0.080 mm and weighs only 44.5 g/km. Suppose a…

A: Given, weight of the copper wire per km of length is ------ 44.5g The mass of wire that is used to…

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 radius is given as, 1.3 x 10-10 m. The diameter will be 2.6 x 10-10 m. Length of copper piece =…

Q: The density of a metal is calculated as follows. The weight of 57.4 grams is divided by the volume…

A: The mass per unit volume of a substance is known as the density of the substance. The density of a…

Q: a cube of ice has mass= 0.0051 lb , determine the volume of this cube in mL if the density of ice is…

A: Given,  Mass of a cube of ice = 0.0051 lb.  The density of ice = 0.920 g/cm3  The volume of ice cube…

Q: The Empire State building in New York City is approximately 1250 ft tall. How many U.S. half dollars…

A: 1 foot length has 304.8mm.1250 foot length has 381000mm.

Q: The mass of a piece of metal is 19.5061 grams. When the piece of metal was dropped into a graduated…

A: Given, mass of piece of metal = 19.5061 g             Initial volume of water in the graduated…

Q: A piece of alloy in the form of a disc weighs 50.0 g.  The disc is 0.250 inches thick and has a…

A: First we have to find the volume occupied by the disc

Q: Perform the following calculation. How many significant figures should your answer be reported to?…

A: The expression given is,

Q: Why are units so important in measurement? Giving examples of measurements with no units should…

A: Unit of measurement is used to define the magnitude of a quantity. Example: length in meter, height…

Q: What is its density if 2.72 g has a volume of 0.121 cm3?

A: Density = mass ÷ volume

Q: A lead ball is added to a graduated cylinder containing 20.3 mL20.3 mL of water, causing the level…

A: The volume of the ball will be the volume of the water displaced.

Q: A 0.790 gram sample of copper is carried through the steps of an experiment. At the completion of…

A: Percent recovery  = (amount of substance recovered ÷ amount of  substance originally taken)×100%

Q: Express the following in scientific notation.(a) 0.0000582(b) 402(c) 7.93(d) -6593.00(e) 0.002530(f)…

A: Scientific notation is the best method to write very small and large numbers. In order to obtain a…

Q: density of water initial mass of erlenmeyer flask 123.221 g final mass of erlenmeyer flask 133.203…

A: In question Following informations given -   Initial mass of erlenmeyer flask = 123.221 g Final mass…

Q: The masses of the starting five players of a 2009 NBA playoff team are 90.7 kg, 129,300 g, 9.12 x…

A: The given masses of players of a 2009 NBA playoff team are (in terms of player A, B, C, D and E):…

Q: ou've just solved a problem and the answer is the mass of an electron,…

A: Given that the mass of an electron is, M = 9.11×10-31 kilograms To write the above value in three…

Q: B. Perform the following calculations, and give the correct number of significant figures in the…

A:

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.