What is the empirical evidence with atoms is gathered through observations

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

A: Given A 37.1 g sample of an unknown compound contains 12.4g of hydrogen. What is the percent by mass…

Q: A certain compound contain 59.9 g of carbon, 8.06g of hydrogen, and 32.0g of oxygen. Another sample…

A: Now, mass percent is defined as the mass of the substance divided by the total mass of the sample ,…

Q: In chemical reactions: Select one: a. molecules and atoms can be created or destroyed b. molecules…

A: To explain in chemical reactions :  a) molecules and atoms can be created or destroyed  b) molecules…

Q: a. What is the mass of 1.49 x 1024 atoms of chlorine? grams b. What is the mass of 9.12 x 1023…

A: a) mass of 1.49×1024 atoms of chlorine.

Q: From the given data below, calculate the % ash of the sample. Weight of the empty container: 16.8967…

A: The mass % is equal to the ratio of mass to the total mass of the substance multiplied by 100. The…

Q: 13 Analysis of 1.60 grams of an oxide of iron formed 1.12 grams of iron. a What mass of oxygen was…

A: The objective of the question is to determine-a. The mass of oxygen formed during the analysis.b.…

Q: A sample of barium reacts completely with oxygen in a specialized crucible. The reaction that occurs…

A: The reaction taking place is given as, => Barium + oxygen ------> Barium oxide  Given : Mass…

Q: This picture represents * Atoms of an element O Molecules of an element O Molecules of a compound O…

A: Atoms are indivisible particles of matter. Elements that cannot be decomposed. Compound composed of…

Q: What is Kc?

A: Interpretation: The information about Kc is to be provided.

Q: Aluminum bronze contains 92.0% copper and 8.0% aluminum. What maximum mass of aluminum bronze can be…

A: Given: Aluminum bronze contains 92.0% copper and 8.0% aluminum.  Mass of Copper =73.5 g Mass of…

Q: A student performs a reaction and the mass of the watch glass, filter paper, and product together…

A: Mass of watch glass + filter paper + product = 130.0g Mass of watch glass = 80.0g Mass of filter…

Q: A box contains a mixture of small copper spheres and small lead spheres that are the same size. The…

A: Given :   Total volume: 411 cm3  total mass : 4.34 kg Density of copper 8.96 g/cm3  density of lead…

Q: How many grams of zinc will contain the same number of atoms as 24.6 g of copper? Express your…

A: Given weight = 24.6 g of copper

Q: A sample of an unknown pure substance X is analyzed and found to contain 8.40 g of Element E,, 9.60…

A:

Q: A scientist has two samples of gas: The first sample contains one mole of argon atoms and has a mass…

A: 1 mole of any gas has equal no. Of atoms i.e., avogadro no. of atoms 6.023*1023 atoms. Or Equal…

Q: A) a 10.00g unknown sample with a formula of CxHY was analyzed by combustion analysis. The sample…

A: The values are given as follows:

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…

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: Given is a sample of X containing E1 and E2. To find: If X is pure? To find mass of E1 if X is 10…

Q: A large number of molecules is called a an element b a compound c a mixture d Depends on the…

A: A multiple choice question based on molecule that is to be accomplished.

Q: Determine the number of carbon atoms in a 381 mg tablet of acetaminophen (C3H9NO2). Given: Molar…

A: Given: Mass of C8H9NO2 = 381 mg = 0.381 g                  (Since 1 g = 1000 mg) And molar mass of…

Q: An analytical chemist measures the amount of Elements E, and E₂ in four samples of an unknown…

A:

Q: What is the term for the property of a substance that cannot be observed without changing its…

A: The property of a substance that cannot be observed without changing its chemical formula is…

Q: Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The…

A:

Q: An analytical chemist measures the amount of Elements E, and E, in four samples of an unknown…

A: A pure substance has a definite chemical composition. A pure substance can be an element or a…

Q: (Mass of crucible and cover is 43.92 g. The mass of crucible, cover, and magnesium is 44.62g. Mass…

A: Magnesium reacts with oxygen to produce magnesium oxide which is white in color. 2Mg+O2→2MgO This…

Q: Use the following information to determine the mass of chlorine combined with the magnesium to two…

A: Given, mass of crucible = 35.1  mass of crucible and magnesium = 38.92  mass of crucible and…

Q: What is the mass of copper  g what is the mass of chloride g given copper chloride 1.652g mass of…

A: Mass of copper = (mass of evaporating dish + copper) - (mass of empty evaporating dish) Mass of…

Q: A sample of carbon weighting 1.48 g was burned in an excess of air. The mass of carbon dioxide, the…

A: This can be calculated in context to the percent mass of carbon. The reaction occurring in the…

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

A: Given: Percent by mass of CO32- ions in sample = 69.14 %

Q: What is the mass percent of sugar in a beverage if 511.8 g of the drink contains 31.6 g of sugar?

A:

Q: Can the mass of one mole of sample A be the same as the mass of one mole of sample B? Explain your…

A: 1 mole of any substance contains 6.023 × 1023 molecules, atoms or ions.

Q: How many molecules are in 6.26 grams of sulfur dioxide? ______ molecules What is the mass in grams…

A:

Q: Suppose you place a piece of copper on the balance without a weigh boat and the measurement reads…

A: Mass of copper(Cu) = 2.589 g Atomic mass of copper = 63.5 g The number of atoms in copper = ?

Q: 5. Compound X is composed of 52.2% carbon, 13.0% hydrogen, and the rest oxygen, by mass. The…

A: Compound X contain C= 52.2%                                    H= 13%…

Q: A 4.5364 g sample of barium chloride dihydrate is placed in a beaker with an empty mass of 65.6433 g…

A: Given, mass of hydrated barium chloride dihydrate , BaCl2. 2 H2O = 4.5364 g            mass of empty…

Q: 9. Na Cro, # of molecules: # of elements: Name of element: # of atoms Total # of atoms: The #4 is a…

A: 9) Na2CrO4 =  Number of molecules = 1 Number of elements = 3 Name of elements Number of atoms…

Q: How many grams of sugar C12H22011 that consists of 1.25 x 1024 atoms of carbons? Molar mass of…

A: Number of atom of carbon = 1.25 × 1024 atoms Number of atoms of carbon = number of moles × Avogadro…