Convert the mass of zinc in the data table into moles of zinc using the atomic mass of zinc. Data Table Mass of Zn HCI Volume Tinitial Tfinal 0.55 g 100.0 ml 20.0 °C 23.1°C How many moles of zinc were used?

Q: How many atoms of silver are in a bracelet that weighs 34.0 g? O 1.1 x 1023 O 1.1 x 106 O 1.9 x 1023…

A: We have to calculate the number of atoms.

Q: nd contains 12.4g of hydrogen. What is the percent by mass of hydrogen in the compound?

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Q: A student obtains 50.00 grams of calcium hydroxide.  Determine the number of hydroxide ions present…

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A: Given, Number of barium atoms =5.28×1021 atomsmass of one mole of barium =137.33 gwe are asked to…

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Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO,…

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Q: other elements. alyzeu P₁, A similar analysis is made of three other substances that also only…

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Q: Which of the following shows a correct setup? O1.45 mol Ca x- 40 g Ca X1 mol Ca O1.45 mol Ca x Са хт…

A:

Q: How many iodine atoms are present in 4.10 moles of diatomic iodine? Give your answer in scientific…

A: Given: The number of moles of diatomic iodine=4.10 moles To calculate: The number of iodine atoms.…

Q: 56.172g of pure (elemental) Si is equivalent o how many moles of Si?   A): 6.02 x 10^23 moles of…

A: SOLUTION Mass of elemental Si = 56.172 g Atomic mass of Si =  28.086 g/mol Moles of Si =…

Q: 7) To elements in the gas state react to form a new compound. Based on the state of matter of the…

A: Reactions in which two or more chemical species combine to form an entirely different species is…

Q: Calculate the total number of N atoms in 23.8 g N2O5. O 2.65 x 1023 total N atoms O 9.31 x1023 total…

A:

Q: A 0.7547 g sample of nicotine was analyzed and found to consist of 0.5588 g C, 0.06565 g H, and…

A:

Q: 719.03 g 35.00 mL 708.4 mol 0.67 L 2.09476 mol L x 3.95 L H = 0 mL mol mol

A: Rule for significant digits in multiplication and division.The answer should have the same number of…

Q: Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her…

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Q: A toy top has a mass of 32.0 g Cu. How many atoms Cu are in this spinning top, given that the…

A:

Q: Complete the resonance structure

A: various structures are possible for a molecule if the molecule has conjugating system. In the…

Q: Composition C-4 is a plastic explosive having a density of 1.05 g/cm3. Calculate the mass of a brick…

A: Given,  Density (D) of C-4 plastic explosive brick = 1.05 g/cm3 Volume (V) of C-4 plastic explosive…

Q: A sample of C, H, contains 4.69 x 1024 H atoms. How many carbon atoms does the sample contain?…

A:

Q: You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the largest number of atoms? Na C Pb Cu…

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Q: A lead fishing weight contains 0.19 mol of lead atoms. What is its mass?

A:

Q: A student has a sample of zinc that weighs 22.19 g How many zinc atoms are in this

A: Given :- mass of Zn = 22.19 g  To be calculated :- number of Zn  atoms  molar mass of Zn = 65.38…

Q: Complete each row of the table below by filling in the missing prefix or missing exponent. 1…

A: Complete each row of the table below by filling in the missing prefix or missing exponent.

Q: Two samples of calcium fluoride are decomposed into their constituent elements. The first sample…

A: The first sample produced, mass of calcium =0.154 g Mass of fluorine = 0.146 g Second sample…

Q: If you calculated the molar mass of your unknown liquid to be 70.1 g/mol, which of the following do…

A: Given-> Calculated molar mass of unknown liquid =70.1 gm/mole.

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Q: need

A: First Calculate the mass of Al :  Mass of Al = Density • volume  Mass of Al = 2.70gcm-3 • 13.2cm3…

Q: Calculate the theoretical density of MgO. The atomic weights for Mg and O are 24.31 g/mol and 16.00…

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Q: A chemist has a 19.50g sample of drinking alcohol (ethyl alcohol). what is the volume ogf the…

A: The relationship between mass and volume is given below.

Q: The atomic masses of chlorine-35 (75.780%) and chlorine-37 (24.220%) are 34.969 amu and 36.966 amu,…

A: To calculate : average atomic mass of Cl

Q: Q/ 0.1 g a NaCL , qul Moarity2 L. Na = 23 . CI = 35.45 *

A: Kindly post question in english language from next time. I can't understand your language but…

Q: Convert the following percentages to proportions: 74.9%, .2%, 5.1%.

A: To solve this problem we will calculate the proportion of given percentage .

Q: An unknown compound has the following chemical formula: PbOx where x stands for a whole number.…

A:

Q: Calculate the number of hydrogen atoms in a 140.0 g sample of tetraborane (B,H0). Be sure your…

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Q: How many carbon atoms are present in 3.95 moles of carbon atoms? Give your answer in scientific…

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Q: Two different compounds both contain Element X and Element Y.  Compound I has 1.000 g Element X and…

A: Two different compounds both contain Element X and Element Y. Compound I has 1.000 g Element X and…

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Q: Portland cement contains 61 % calcium oxide. Calculate the mass of calcium oxide and the mass of the…

A: One ton is equal to 907.185 kgs.The conversion factor is  (1ton/907.185 kgs )  or  (907.185…

Q: An unknown compound has the following chemical formula: NxO where  x  stands for a whole number.…

A:

Q: How many moles does 120.30 g lithium represent? Use correct significant figures and units.

A: The number of moles of an element present in a given amount is calculated by using the following…

Q: ite the term used for a certain number of things. (If u don't know, look it up!) An example is shown…

A: 1) 1 dozen mice 2) 1.083 dozen 3) 1.67 dozen Kangaroo  4) 5.02×10^22 dozen water molecules.  5) 272…

Q: A sample of lead contains 8.88 x 1015 micrograms. How many atoms does this sample contain?

A:

Q: Analysis of a 20.0 g sample of pure carbon dioxide shows that it contains 5.46 g of carbon. How many…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: A chemist measures the amount of bromine liquid produced during an experiment. She finds that 2.3 g…

A: Given :- mass of bromine liquid produced = 2.3 g  To calculate :-  Number of moles of bromine liquid…

Q: Na2C6H6O7Na2C6H6O7 (sodium hydrogen citrate) Express the mass of sodium to three significant…

A: The question is based on mole concept. we need to calculate mass of sodium present in the given…

Q: A tiny sample of gold contains  1.5 x 10^16 atoms. The mass of the gold sample is ______  μg.

A: Given the number of gold atoms, the tiny sample contains = 1.5*1016 atoms We have to find the mass…

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.