Which observation illustrates the law of conservation of mass? A.)When 3 g of carbon reacts with 8 g of oxygen, 11 g of carbon dioxide is produced. B.)Burning 10 g of propane produces twice as much carbon dioxide as burning 5 g of propane. c.)The C:O mass ratio of a particular compound is the same, regardless of the size or source of the sample. D.)The C:O mass ratio of one compound is exactly double that of another compound.

Q: We have found two isotopes of carbon in our samples, the first with mass number 14 and the second…

A: Definition of Isotopes - The isotopes of an elements can be defined as atoms with the same number of…

Q: 106. Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 fm,…

A:

Q: The U.S. Environmental Protection Agency (EPA) sets limits on healthful levels of air pollutants.…

A: The number of lead atoms can be calculated as follows:

Q: hydrogen phosphide can be decomposed to give phosphorus and hydrogen in a mass ratio of 10.32:1.00.…

A: the molecular formula of this substance is PH3 and the name of this compound will be phosphine.

Q: What is the radius (in cm) of a pure copper sphere that contains 1.27*1-^24 copper atoms?  The…

A:

Q: Back on planet Earth, elements have different isotopic distributions. The atom Chlorine ( Cl ) has…

A:

Q: e percentage abundance

A:

Q: Calculate the mass ratio: 0.445 g Iodine 0.117 g Zinc (g Iodine/g Zinc)

A:

Q: The fact that the C atom can form compounds like CH4, C2H5O, H2C=CH2, HC≡CH, etc., demonstrates…

A: To find: The fact that the C atom can form compounds like CH4, C2H5O, H2C=CH2, HC≡CH, etc.,…

Q: A sample of 5.000 g of nitrogen can be combined with 5.714 g of oxygen to form nitric oxide gas…

A: The amount of products formed for the given quantity of reactants is determined using stoichiometry.…

Q: Imagine an alternate reality. The Thomson cathode ray experiments arrived at a charge to mass ratio,…

A: Here, we have to determine mass of electron.

Q: The halogens are all in the same group. What is the pattern in reactivity as you go down group 7A?…

A: To  Does the reactivity increase or decrease, as we go down from F to CL to Br to I? How is this…

Q: A 6.55 g sample of calcium sulfide was decomposed into its constituent elements, producing 3.64 g of…

A: According to the law of constant composition, for any particular chemical compound, all samples of…

Q: a. Using the average atomic mass of carbon, calculate the mass (in amu) of 137 carbon atoms. amu b.…

A: Answering only the first 3 subparts as per guidelines for further assistance please post the…

Q: 2. In the previous example, you added 4 Boron-11 isotopes to 1 Boron-10 to make the average atomic…

A: We know, average = sum of observations/ total number of observations

Q: Suppose instead of burning Mg, pure carbon weighing 3.62, 5.91, and 7.07 g were burned in an excess…

A: The Law of Definite proportion state that The same mass ratio is possessed by the elemental…

Q: The element Mg Ca Cs Ba Be is the most similar to sodium in chemical and physical properties.

A:

Q: A sample of 7.000 g of nitrogen can be combined with 8.000 g of oxygen to form nitric oxide gas…

A: In NO, the ratio of moles of N and O is = N : O = 1 : 1. Hence 1 mole of NO contains 1 atom of N and…

Q: Consider two compounds. Compound A contains 2.77 g of phosphorus and 9.53 g of chlorine. Compound B…

A: Given,Mass of Phosphorus in compound B =11.9gMass of chlorine in compound B =40.9g

Q: Naturally occurring chlorine is composed of two isotopes: 75.76% Cl-35 (mass 34.9688 amu) and 24.24%…

A: The elements having same atomic number, but different mass number are termed as isotopes. A molecule…

Q: Upon decomposition, one sample of magnesium fluoride produces 1.66 kg of magnesium and 2.58 kg of…

A: The values are given as follows:

Q: An atom has a diameter of 3.00 Å and the nucleus of that atom has a diameter of 7.50 × 10-5 Å.…

A:

Q: A sample of 6.000 g of nitrogen can be combined with 6.857 g of oxygen to form nitric oxide gas…

A: To Find: To find out the mass of oxygen required to react with  nitrogen to form nitrogen dioxide.

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.