The atomic weight of silicon is 28.0855. Round this to 4 significant figures. O a. 28.09 b. 28.1 Oc. 28.0 O d. 28.08

Q: 1. Platinum ( pt) a. Write the physical and chemical properties of the element above. b. Write the…

A: Please find your solution below :  a. Physical properties : Atomic number = 78 Atomic mass =…

Q: A piece of weighing paper recorded a mass of 0.200 g. An object was placed on the weighing paper to…

A: Mass of object =10.900-0.200                               =10.700g

Q: A rectangular  block has the length of 4.20 cm and width of 1.38 cm.   If the  rectangular block has…

A:

Q: 13. What is the mass (in kg) of 45.3 mL of a liquid that has a density of 0.643 g/mL? a. 29.1 kg d.…

A: The given data Volume = 45.3mL Density = 0.643 g/mal Mass   = ?

Q: An irregular sample of zinc has a mass of 23.21 g. This sample is carefully placed in a graduated…

A: Given data : Mass of zinc (mZn)= 23.21 g The initial volume of water (Vw)= 18.75 mL Density of zinc…

Q: 7.The density of osmium is 22.6 g/cm³. A sample of osmium with a mass of 21.8 g would occupy a…

A: General chemistry.

Q: g/cm')? 2. Three students use a meterstick to measure a length of wire. One student records a…

A: As per our guidelines, I can only answer first question because you have posted multiple questions.…

Q: 2. Which one of the following is the greatest mass? (Hint: converting all masses to the same unit…

A: Mass is both a property of a physical body and a measure of its resistance to acceleration (a change…

Q: The Mass: The A block is :19.30kg The B block is : .40kg The C block is : 19:32kg…

A: In the above question, mass  and volume of some compounds are given.

Q: 1. What is the sum of 89.332 g and 1.1 g? a. 90.4g b. 90.432g C. 90.0g d. 90.43g

A: The significant figures of a given number are those significant digits, which express the meaning…

Q: A sample of calcium chloride, CaCl2, has a mass of 27.8 g. What mass of chlorine is present in the…

A:

Q: sample of water has 2.15x1024 molecules. What is the mass of the sample?

A: Molecular weight of water = 18 g/ mol 1mol of any substance contain 6.023× 1023  number of…

Q: 12. What is an element? A compound?

A: An element and a compound has to be defined.

Q: The mass of a certain atom is 2.086 x 10-22 g. This is the same mass as 2.086 x 10-16 mg. 2.086 x…

A: mass = 2.086 x 10-22 g

Q: 2. Which of the following statements is a theory? A. In a reaction, the total mass of reactants is…

A: A) In a reaction total mass of reactant is equal to total mass of products - Law of Conservation of…

Q: A student measures the dimensions of a metal block to be 2.0 cm in length, 1.0 cm in width, and 0.75…

A: a. Given mass of metal = 7.56 g And dimensions of metal block = 2.0 cm in length, 1.0 cm in width,…

Q: The first box is the key. The second box represents.... 00 00 00 00 00 0 00 OO OO Atom Y: O Atom Z:…

A: Pure substances are those substances which are made up of only one type of elements. These cannot be…

Q: 13. While cleaning your attic, you found your old rock collection. If 83.58% of the rocks have a…

A: To find the average mass of rock collection we can use weighted average method.   In this method we…

Q: 3. In order to decide whether a property is chemical or physical, you must know whether a. measuring…

A: Ans  3) d. The property is intrinsic or extrinsic

Q: A piece of aluminum foil has a known surface density of 15 g/cm2. If a 100-gram hollow cube were…

A: Given: Surface density is 15 g/cm2. Mass is 100 g.

Q: Which accurately shows the Law of Conservation of Matter (Mass)? A. When 2 oxygen molecules combine…

A: Law of conservation of mass states that mass can neither be created nor be destroyed although it can…

Q: Consider the voltaic cell with a standard cell potential of 2.89 V: Sr|Sr2+ (1.0 M)||H* (1.0 M)|H₂…

A: Given :  Standard cell potential = 2.89 V  According to standard cell notation left hand side…

Q: 1. Identify each of the following as a homogenous or heterogeneous mixture. a. Blood b. Wine c.…

A: 1) a. Blood - heterogeneous mixtureb. Wine - homogeneous mixturec. Saltwater - homogeneous mixtured.…

Q: 2. Homogeneous mixtures(s) A. distilled water B. gasoline C. sandy water D. copper turnings + iron…

A: A. distilled water is a pure substance, not a homogeneous mixture. B. gasoline is homogeneous…

Q: The density of a material can be used to calculate the volume of an object if its mass is known.…

A: Given Mass of quarter = 6.25 Density = 10.5 g/ml  Unknown Volume of quarter??

Q: Brass is an alloy of copper and zinc. Varying the mass percentages of the two metals produces…

A: Mass of Yellow zinc = 135 g Brass = an alloy of Cu and Zn Yellow zinc = A brass (34-37)% Zn by mass…

Q: 8. A gold ring has a mass of 15.37 g. If this ring is pure gold (density = 16.1g/mL), what would the…

A: Given data, density of gold = 16.1 g/ mlmass of gold = 15.37 g

Q: Classify each statement as an observation, a law, or a theory.a. Chlorine is a highly reactive…

A: Law: A descriptive generalization about how some aspect of the natural world behaves under stated…

Q: Which is considered an elemental substance? A.CO (carbon monoxide) B.H2O (water) C.I2 (iodine) D.A…

A: Given,CO (carbon monoxide)H2O (water)I2 (iodine)A and C are elemental substances.All of the above…

Q: Mass of one a mu) Carbon Type 1                                12.0 Carbon Type 2…

A: The sum of all the values of individual masses divided by the total number of items in the sample is…

Q: Classify each statement as an observation, a law, or a theory. a. Chlorine is a highly reactive gas.…

A: The given statements are classified as an observation, a law or a theory has to be given.

Q: The density of sulfuric acid is 1.84 g/mL. What volume of this acid will weigh 15.7 g?

A: Given :- density of sulfuric acid = 1.84 g/mL  mass of sulfuric acid = 15.7 g  To calculate :-…

Q: Brass is an alloy of copper and zinc. Varying the mass percentages of the two metals produces…

A: Brass is a substitutional alloy. Yellow zinc is also known as brass. It is an alloy of copper and…

Q: if the density of an element 1.5 g/ml with volume 1.8 L, its mass will be .. 2700 O 2.7 O 1200 1.2…

A: Given question is asking about the mass of substance, if density and volume of solution is present .…

Q: -22 The mass of a certain atom is 2.086 x 10 g. This is the same mass as 2.086 x 10-16 mg. 2.086 x…

A:

Q: Refer to the picture to match the interactions Which one shows hydrogen bonding of R-groups Which…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: The density of mercury is 13.6 g/cm^3. What is the volume of 6.00 g of mercury? Select one: O a.…

A: Given, Density of mercury= 13.6 g/cm3 Mass of mercury= 6.00 g We know, the formula of density,…

Q: 31. consider the following reaction: HBr он + Hо Br (a) Determine whether this reaction proceeds via…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Consider a ring which was electroplated with gold (Au, MM = 197 g/mol) using an Au(III) salt with a…

A: Given :  Molar mass of Gold = 197 gm/mol  Current (I) = 0.328 A  Time (t) = 4 min = 240 sec  F =…