15. Suppose pairs of balloons are filled with 10.0 g of the following pairs of gases. Which balloon in each pair has the greater number of particles? (a) CO2 or NO; (b) CO2 or SO2; (c) O2 or Ar Note: The term ‘particle’ refers to either atoms or molecules depending on context. A particle is any elementary entity that is individually separate and distinct.

Q: The two naturally occurring isotopes of element X are ^18X (80%) and ^19X. What is the average…

A: Average atomic mass: The average atomic mass of an element is the sum of the masses of its isotopes,…

Q: Almost all boron atoms are found in two forms: boron-10 and boron-11. Both isotopes behave alike…

A: Given, Boron atoms are found in two forms: boron-10 and boron-11 Average mass of B = 10.81 amu

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

A:

Q: By the end of this module you will be able to: • · ● · • . Module 2 Atomic Structure and…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: You have a compound with the formula X₂Y. X is an isotope with a mass of 20g/mol and Y is an isotope…

A: Mass of X = 20 g/mol Mass of Y = 43 g/mol

Q: Calculate the molecular mass of the ethanol using the mass of the electrons, protons, and neutrons.…

A: We know that no. of electrons in ethanol =26 No. of protons in ethanol = 26 No. of neutons= 20

Q: sa particle.

A:

Q: we determine the average atom + mass of Cl-37 75.78 ) + (36.966 amu 24.22 100 100

A: Average atomic mass =    = M1X1+M2X2/100  M1 and M2 are atomic masses and X1 & X2 are prevent…

Q: Determine the numbers of protons, neutrons, and electrons in each of the following species: (a)…

A:

Q: How has the understanding of the structure of the atom changed over time? Briefly describe the…

A:

Q: The radius of a rhodium atom is 134 pm. How many rhodium atoms would have to be laid side by side to…

A: GivenRadius of rhodium = 134pm Distance= 1.70mmMass of single uranium atom = 4.70×10^-22g

Q: What are the basic units-single atoms, molecules, or for- mula units-that compose each substance?…

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

Q: Iron exists in nature as a mixture of predominantly three isotopes: ⁵⁴₂₆Fe (53.94 amu), ⁵⁶₂₆Fe…

A: We have to calculate the percentage of rarest of three isotopes.

Q: The natural abundance of the three stable isotopes are 90.92% isotope A (19.9924 amu), 0.3104%…

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: The radioactive nuclide with the symbol 75Se is used to measure the shape of the pancreas. What is…

A: The atomic number of Se is 34 and the mass number of this radioactive nuclide of Se is 75. Atomic…

Q: 8. Europium is the element responsible for the red phosphors in a colour TV screen. The mass…

A: #8: We are given the mass spectrum of the isotopes of the element Europium(Eu).  According to the…

Q: (a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of…

A:

Q: 10. Platinum has six isotopes: 1⁹0Pt, 192Pt, 194Pt, 195Pt, 196Pt, and 198Pt. The natural abundances…

A: We need to find the Average atomic mass of platinum from the given data of atomic mass of Isotopes…

Q: Imagine that you have discovered several stable isotopes of a new element, which you call element X.…

A:

Q: 5. When a 5.0 gram sample of Cu(NO,), • x H,0 is heated, 3.9 grams of the anhydrous salt remains.…

A:

Q: When a 220 g sample composed of ibuprofen (C13H1802) and some inert material is added, the mass of…

A: The mass percentage of an element in a given compound is a measure of the amount of the element…

Q: 5) ✓ PbS04 → PbSO3 + _ 02 6) _ Al + Fe2O3 → Fe + . Al203 7) SF6 → S + F2 8) _ C2H4 + 02 → CO2 + _ 9)…

A:

Q: At some point in the future, nuclear chemists have synthesized two stable isotopes of bohrium.…

A: Since average mass of the element is given so we can easily calculate the fraction of each isotope…

Q: Identify as true (T) or false (F): | Minerals separating from flowing water as stony deposits…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: There are two isotopes of the element lithium that occur naturally, 6Li (mass = 6.015 amu) and 7Li…

A: Let the percentage abundance of one of the isotope be x. Then the percentage abundance of another…

Q: The reaction between NH3 and O2 produces NO and H₂O. 4 NH3 (8) + 5 O2 (g) 4 NO (g) + 6 H₂0 (1) If a…

A:

Q: Antimony has many uses, including infrared devices and as part of an alloy in lead storage…

A: a) Notation for each isotope antimony 121 ---->   51Sb121   antimony 123 ---->   51Sb123

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.