Make a graph of the average mass vs. year. Make sure axes are labeled.

Q: The atomic weight of silicon is 28.0855. Round this to 4 significant figures. O a. 28.09 b. 28.1 Oc.…

A: Here we have to round the atomic mass of silicon 28.0855 to 4 significant figure.

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: What WOuld you multiply "moles of scandium" by to get the units "grams of scandium"? moles Sc x…

A: Molar mass of Sc = 44.9559 g/mol

Q: e this information to answer the questions below. Be sure your answers have the correct number of…

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Q: To determine the Roman Numeral, you need to know the ____?______ on the ___?_____ in the compound."

A: The periodic table have numbers 1, 2, 13, 14, 15, 16, 17, 18. The corresponding roman numerals used…

Q: . ZnO              _________________________       74. AsCl3           _________________________…

A: for multiple subparts-" since you posted a question with multiple subparts, we will solve the first…

Q: 4. Exactly 2 g of steel wool was placed in a 100 g glass jar. After 50 g of water was added to the…

A: Dear student, we are authorised to solve only one question at a time. Please post rest of the…

Q: 4. It is possible for equal volumes of gases, at standard pressure and temperature, to contain equal…

A: Given Temperature , Pressure are constant.

Q: How many sig figs are in the following numbers

A: All non-zeros are significant  Leading zeros are non-significant whereas trailing zeros are…

Q: State the law of conservation of mass. Write out a lab that would help you prove the law. Make sure…

A: Conservation of mass says the total mass of the reactants must equal the total mass of the products.…

Q: Solve this

A: The element contains one type of atoms only. The compound has two or more elements. The chemical and…

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

A:

Q: Particles

A: Dear student I have given answer to your question in the image format.

Q: Classify the substance shown in the sketch below. You can click the other tabs in the sketch to get…

A: In chemistry, compounds are classified as solid, liquid, or gas based on their physical and chemical…

Q: a. 13538) b 4513) C. 45.3) d 4.130

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Q: 1. Diameter of the cylinder of coins 2. Radius of the cylinder 3. Calculated area of base of…

A: Given, We are using nickel for making a stack of 5 coins Diameter of a cylinder of coins = 1.6 cm…

Q: 2. is a statement about a regularity in nature law a. b. theory c. d. hypothesis Both a and c In the…

A: These questions are based on fundamental concepts in the scientific method and the philosophy of…

Q: There are two different sizes of paperclips and they have been connected into clusters by linking…

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Q: Compiler element compiler Chemical Non metal Compound Name Formulas Metal Anion cation metal non…

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Q: Compare the amount of copper predicted in part A with the amount measured in part B. What percentage…

A: Predicted copper amount=0.9918 Actual amount of copper produced= 0.72

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

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

Q: Which two options describe behaviors of particles that are related to the chemical properties of the…

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Q: In Express your answer as an integer. N=                              Electrons    Ca Express your…

A: In Neutral atom, number of electrons are always equivalent to atomic number of that atom.

Q: 5. An experiment is performed and the results of the lab produce 54.2 grams of a compound. The lab…

A:

Q: Chem 105 Online Density of Metal Stacked Metal Coins 1. Obtain the mass of 5 coins of the same…

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Q: Calculate the number of atoms in 940 μg of scandium. Answer in scientific notation.

A: The number of moles for a given compound or a molecule refers to the ratio of its mass to the…

Q: topic: matter does each sample have a measurable mass? how do you measure the mass of each sample?…

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Q: Mass of evaporating dish #1 and original sample (9) 39.0119 0.848

A: In the given question it is asked for the Mass of the evaporating dish and the sample.It means it…

Q: What is the mass, in g, of 2.67 × 10 nickel (Ni) atoms? Enter your answer in scientific notation. 12…

A: The given data contains, Atoms of nickel = 2.67×1012 Molar mass of Nickel = 58.69 g/mol.

Q: In oxidation, a substance ……………………………………           A. Loses and gains electrons B. Gains…

A: Oxidation is a process of reaction

Q: the mass of a piece of Zn having a volume of 4.56 cm3

A:

Q: Show all your work on a sheet of paper to solve the following problem. Full credit is based upon the…

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Q: A copper atom has a mass of 1.06 x 10 -22 g and a penny has a mass of 2.5 g. Use this information to…

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Q: 2. Structure E is a form of carbon. What is the name of this structure? A. carbide B. graphite Put a…

A: An element is a pure substance made up of only one kind of atom. The elements can be categorised…

Q: Based on the molecule below with each carbon labeled with sequential numbers, answer the following…

A: Primary carbon is defined as the carbon which is attached to only one carbon atom and three hydrogen…

Q: A chemist measures the amount of nitrogen gas produced during an experiment. She finds that 27.7 g…

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Q: Match the correct prefix with the factor.

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Q: 1Mg + 1H2SO4 1MgSO4 + ___H2 2. 3Fe + ___O2 1Fe3O4 3. 2Pb(NO3)2  2PbO + ___NO2 + 1O2 4. ___C2H6 +…

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Q: 11 This Pictograms stands for

A: The given pictogram is chemical hazard symbol. Chemical hazard symbols are found on reagent bottles…

Q: Four research teams measured the density of a new alloy, and what each team wrote in its team…

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Q: 5. Hydrogen and oxygen react chemically to form water. How much water would be formed if 2.4 grams…

A: Using mole concept easily determines how much moles of products or reactants are formed.

Q: Review Constants I Periodic Table MISSED THIS? Read Section 6.6. You can click on the Review link to…

A: Step 1:   Step 2: Step 3: Step 4:

Q: Bromine-88 is radioactive and has a half ife of 16.3 seconds. What percentage of a sample would be…

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Q: Blue beads (Al): Yellow beads (S): Green beads (0):

A: FORMULA Al2 (SO4 )3 Al=2 atoms S=3 atoms O= 12 atoms     blue beads Al= 2 yellow beads S=3 green…

Q: Your Question :help  please answer in text form with proper workings and explanation for each and…

A: Option a: This option is incorrect because, while scientific theories may describe the nature of a…

Q: What is being represented by the picture below? a compound being physically separated into its…

A: In the representation, the reactants contain molecules of a compound and the products contain…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.