The mass of an object was determined using two balances of different precisions. Balance 1 gave 5.40 g and Balance 2 gave 5.390 g. The average mass must be reported as

Q: Aqueous hydrochloric acid  HCl  will react with solid sodium hydroxide  NaOH  to produce aqueous…

A: The balanced chemical equation for given reaction is as follows,

Q: If you add 21.1 mL of solution from a buret into a flask that already contained 38.7 mL of solution,…

A: Given that,  21.1 mL of solution from a buret is added into a flask that already contained 38.7 mL…

Q: A general chemistry student found a chunk of metal in the basement of a friends house. She measured…

A: Density of a metal is specific and constant. Density = mass/volume  1 mL = 1 cm3 Given that: Mass of…

Q: Calculate the volume of a box, in cubic centimeters, which is 423 cm long, 12 cm wide, and 25 cm…

A: Given that the length of box (L) = 423 cm, width (B) = 12 cm, and height (H) = 25 cm The volume of…

Q: 8. On his birthday, Emilio received a gold nugget as a present from a friend and was curious to…

A: Given -> Weight= 17.24 gm Initial volume= 12.3 ml Final volume= 13.4 ml Density of pure gold =…

Q: A student goes to the lab and is tasked with measuring the mass of a block of nickel metal that has…

A: In given question there is need to define how the exact value is determined from different…

Q: A homogeneous mixture was prepared by mixing 0.90 g A, 105.7 g B and 48.17 g C. The volume is found…

A: Given, Volume of mixture = 56.6 cm3 Mass of A = 0.90 g Mass of B = 105 .7 g Mass of C = 48.17 g

Q: A flask that contains 14. 59 mL liquid has a mass of 35. 66 g . What is the density of the liquid if…

A:

Q: Suppose you were given a piece of unknown metal, with a mass of 22.580 g, and a 50-mL graduated…

A:

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: Suppose you measure out 2.56 x 1024 molecules of water on the balance. If the cup containing the…

A:

Q: 3. A sheet of metal is 78.1 mm wide and 40.5 mm long. If it weighs 31.19 g and the density of the…

A:

Q: An atom of a particular element has a volume of 7.8 x 10-31 m3. What is this volume in cubic…

A: An atom is always neutral because of the equal number of electrons and protons. Electrons are…

Q: A piece of metal ore weights 2.00 g. When a student places it into a graduated cylinder containing…

A:

Q: An empty beaker is placed on a balance, and its mass is recorded at 42.513 g. The beaker is removed…

A: In this question, we want to determine the mass of the sodium chloride solution ( NaCl )  You can…

Q: Aqueous hydrochloric acid (HCI) will react with solid sodium hydroxide (NaOH) to produce aqueous…

A:

Q: a student uses a graduated cylinder to determine the volume of water dispensed from a 50.00 ml…

A: To find percentage difference between two values, calculate difference between two values and divide…

Q: Gaseous butane (CH3(CH2)2CH3) will react with gaseous oxygen O2 to produce gaseous carbon dioxide…

A: As given in the question that butane reacts with gaseous oxygen to produced carbon dioxide and…

Q: A 100.0 mL graduated cylinder was used to measure the volume of water. The initial volume of the…

A: Given:Mass of coin = 96.51 g.Volume of coin = final volume – initial volumeVolume of coin = 56.0 mL…

Q: A hectacre (1.0000 x 104 m2) is a metric unit of area analogous to an acre. How many square feet are…

A: 1 feet consists of 0.3048 m and 1 square feet consists of 0.093 m2. 1 hectare consists of 10000 m2 5…

Q: A beaker weighed 46.53 g. To the beaker was added 5.132 g of iron pellets and 54.3 g of hydrochloric…

A: The law of conservation of mass states that, the total amount of material in the reactant side has…

Q: A homogeneous mixture was prepared by mixing 0.15 g A, 112.3 g B and the 24.55 g C.  The volume is…

A:

Q: A stack of paper has a volume of 187 cube inches Now all the sheets are laid out on the floor,…

A: Given: Volume of a stack of paper = 187 cubic inches Area covered by paper       = 46,750 square…

Q: A student determined the mass of a sample in a beaker by subtracting the mass of the empty beaker…

A:

Q: If an object as a density of 4.00 g/cm^3, what is its density in units of kg/m^3?

A: Given : density = 4.00 g/cm3

Q: A gold cube is 150.00 mm long, 10.00 cm wide, and 0.95 m thick. If gold has a density of 19.3g/cm^3,…

A: The density of any substance is defined as the ratio of its mass to the volume of the substance.

Q: A student measures a block to weigh 127.95 grams what would this mass be in milograms with the…

A: Given – Mass of block = 127.95 g   To find - convert g to mg

Q: Calculate the tare weight for an object placed in a 10.9114 g container with a total mass of 16.4545…

A: Container that when subtracted from gross weight yields the net weight is regarded as tare weight.…

Q: a student obtains a sample of a sand/salt mixture in a test tube. home weighs the test tube with the…

A: The weight consists of two term Sample and test tube .

Q: How many acres are in nine hectares? Express your answer using four significant figures. One hectare…

A: We have to predict the area in acres.

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

A:

Q: Suppose you are measuring the mass of a solid sample on a balance using a weigh boat. You record the…

A: An instrument used to determine the weight of samples used in analysis is called a weigh balance.…

Q: An object is determined to have a mass of 0.00180 g . How many significant figures are there in this…

A: Significant figures – calculation rules are as follows,Significant figure is a non-zero number…

Q: Suppose you measure out 1.080 moles of sodium chloride on the balance. If the weigh boat containing…

A: A numerical problem based on mole concept. No.of moles of NaCl is prescribed based on which the mass…

Q: Tom bought some flour. He filled 18 big jars and 25 small bottles with all the flour. A big jar…

A: Answer: let's assume that each small bottle contains x gram of flour the each big jar would contain…

Q: What is the density and identity of the metal? (see Table 3.1)

A: Mass of object = 8.37 g Volume occupied by metal = 3.10 mL Density = mass(g)/volume(mL)  = 8.37/3.10…

Q: Liquid octane (CH; (CH,), CH3 will react with gaseous oxygen (02) to produce gaseous carbon dioxide…

A: Given: Mass of octane = 24.0 g Mass of oxygen = 126.0 g Molar mass of octane = 114.23 g/mol Molar…

Q: A piece of metal with a mass of 13.2 g was dropped into a graduate cylinder containing 17.00 mL of…

A:

Q: Find the difference between two masses measured as 123.6 grams and 115.972 grams. Express the answer…

A:

Q: A piece of metal ore Weights 5.00 g. When a student places it into a granduated cylinder containing…

A: Density of substance= Mass of substanceVolume of substanceGiven mass of metal ore = 5.00 g

Q: Gaseous ethane (CH,CH,) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: I think I did a calculation wrong but I am having trouble understanding significant figures. In…

A: Significant figures: These are the digits of a number that are useful in terms of accuracy and…

Q: A sunscreen preparation contains 2.50% by mass benzyl salicylate. If a tube contains 4.0 ounces of…

A: It is required to calculate the mass of benzyl salicylate in kg required to manufacture 325 tubes of…

Q: If a sample of clay has a density of 1.7 g/cm3 and it takes up a volume of 0.43 cm3, what is its…

A:

Q: An iceberg has a volume of 8365 ft^3 What is the mass in kilograms of the iceberg? The density of…

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

Q: An atom of a particular element has a volume of 7.8 X 10-31 m3. What is this volume in cubic…

A: Find volume of atom in cubic nanometre

Q: Calculate the mass in grams of 13.0 mol of copper(I) sulfate. Enter your answer in scientific…

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.