15. A chemist has 2.50 grams of magnesium. How many particles of magnesium does the chemist have? The same chemist also has 26.10 g of I2. How many particles of I2 does the chemist have? What conclusion can you form concerning the number of moles of Mg and I2 present and their respective particle numbers?

Q: 16.The atomic masses of * Cl (75.53 percent) and "Cl (24.47 percent) are 34.968 and 36. 956 a.m.u.,…

A: Introduction: Chlorine belongs to group 17 elements with atomic number 17 and mass 35.45 amu. Group…

Q: 1. What is the difference between carbon-13 and carbon-14? a. The number of electrons b. The number…

A:

Q: In 1961, scientists agreed that the atomic mass unit (amu) would be defined as 1/ 12 the mass of an…

A: Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: 27. Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.57 kg…

A:

Q: Magnesium oxide was formed when the metal burns in air.  (i)            If 1.25 g of magnesium…

A: Answer:- This question is answered by using the simple concept of calculation of mass ratio of the…

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: One way in which Earth’s evolution as a planet can be understood is by measuring the amounts of…

A:

Q: In honor of the late Alex Trebek, your Chemistry class holds a Jeopardy tournament. The Final…

A: Since you have posted more than one question, we are doing first for you. To do the rest repost the…

Q: X is an element with 3 isotopes, X-139, X-140 and X-141. The relative abundance of each isotope is…

A: If A1 , A2 and A3 are mass numbers of three isotopes of an element with relative abundance X1 , X2…

Q: On earth, tin has 10 different stable isotopes. The heaviest, 124 Sn makes up 5.80% of naturally…

A: Given: 1)To determine the no.of atoms of 124Sn present in 27.3g of natural sample. 2) To calculate…

Q: 2. The states that the total number of atoms does not change in a chemical reaction. 3. А combined…

A:

Q: Reference section 3.2 to find the atomic masses of 12C and 13C, the relative abundance of 12C and…

A:

Q: 18. How many moles of gold atoms do 3.45 X 1044 gold atoms constitute?

A: We know that the number of atoms is given by below expression  number of atoms = moles X avogadro…

Q: 6. Isotopes. Silicon (Si) is a major component of semiconductor chips. It has three naturally…

A: Calculate electron, proton and neutron in each case---

Q: The atomic masses of 6 Li and7Li are 6.0151 amu and 7.0160 amu, respectively. Calculate the natural…

A: The natural abundance of the heaviest isotope is to be calculated.

Q: Sulfur forms several compounds with fluorine. Upon decomposition, sample one produces 4.45 g of…

A: Given information is:                   Sample 1 →Decomposition F(4.45grams) + S (1.25grams)…

Q: The atomic masses of 6Li and 7Li are 6.0151 amu and  7.0160 amu, respectively. Calculate the natural…

A: Given data contains, Atomic mass of 6Li is 6.0151 amu. Atomic mass of 7Li is 7.0160 amu. Average…

Q: Is it possible for 2 Carbon atoms to have different mass numbers? How?

A: Yes, it is possible for 2 Carbon atoms to have different mass numbers.

Q: The atomic weight of Cl is 35.45 amu. There are only two naturally occurring isotopes of chlorine:…

A: Given  The average atomic weight of Cl = 35.45 amu  The weight of 35Cl   = 35 amu  The weight of…

Q: Boron consists of two isotopes. The reported mass of boron is the weighted average of these two…

A: Boron has two isotopes which are B-10 and B-11. It is given that the abundance of B-11 is x and for…

Q: Is the statement inconsistent with Dalton’s atomic theory as it was originally stated? Why? The…

A: Yes,the statement that formation of a compound often involves the destruction of of one or more…

Q: Explain why the atomic mass listed on the periodic table is 126.9 amu for an atom of iodine and, for…

A: Isotopes are the compounds which have same atomic number but different mass number.

Q: Naturally occurring uranium consists of two isotopes, whose masses are shown below: Isotope Mass…

A:

Q: Consider a rectangular piece of printer paper that is 8.5" x 11" (" denotes inches). In order to…

A:

Q: What if a new element, Tyserium (Ty), was discovered and was found to have two isotopes, Ty-331…

A: The average Atomic mass of any element is the average of atomic masses of different isotopes present…

Q: In Star Trek, a (fake) element that often plays a role in the plot is dilithium (Dt), which has…

A: Since the % abundance is not given exactly, it is a variable, thus answer will be given in terms of…

Q: How many grams of Kr are there in a sample of Kr that contains 6.43×1023 atoms? A sample of Xe…

A: Hello. Since multiple questions have been posted and the questions which need to be solved haven’t…

Q: How many in3 are in 2.20 cm3? (show your calculations)

A: Given value 2.20 cm3we need to change in in32.20 cm3= ? in3

Q: A completely made up element called Krystogen has two naturally occurring isotopes. The atomic…

A: Every atom in periodic table has some atomic mass and atomic number. When atomic number of two…

Q: 19. Two particles X and Y have the following composition: X: 17 protons, 18 neutrons, 17 electrons…

A: The question is based on the concept of atomic structure. there are various subatomic particles like…

Q: On earth, tin has 10 different stable isotopes. The heaviest,  124Sn makes up 5.80% of naturally…

A:

Q: How many neutrons are in 37.0 ug ( ug= 10^-6 g) of 14 6 C?

A: Given :- mass of 6C14 is 37.0ug  1ug = 10-6 g  To be calculated :-  Total number of neutrons

Q: On another planet, the isotopes of titanium have the given natural abundances. Mass (u) Isotope 46TI…

A:

Q: A cylindrical piece of pure titanium (Ti, density=4.506 g/cm^3) has diameter d=1.15 cm and length…

A:

Q: Hydrogen sulfide is composed of two elements: hydrogen and sulfur. In an experiment, 6.500 g of…

A: a)The mass of sulfur obtained is calculated as shown below,

Q: 1. Use the concepts of relative abundance and relative weight to explain why carbon has an atomic…

A: If the element have isotopes then its average atomic mass is calculated.

Q: 2.2. Boron has two naturally occurring isotopes, 1 B and "B. We know that 80.22% of its atoms are…

A: Answer: 2.2) Atomic weight of 10B 10.0084 u 2.3) Average atomic mass of Boron 10.81 g

Q: Variations in average atomic mass may be observed for elements obtained from different sources.…

A:

Q: The average mass of a carbon atom is 12.011.  Assuming you were able to pick up only one carbon atom…

A: The average mass of a carbon atom is 12.011. There are three isotopes of carbon. C-12, C-13, and…

Q: 1. A solid circular cone made of pure platinum (d = 21.45 g/cm3 ) has a diameter  of 2.75 cm and…

A:

Q: 14. Selenium-75 is used in the diagnosis of disorders related to the pancreas . How many (a) protons…

A: In a neutral atom the number of electrons and protons are same.

Q: 4) Chromium has four isotopes. Chromium-50 (mass of 49.946 amu and 4.35% abundance), chromium-52…

A: Given,  The chromium four isotopes are Chromium-50, (mass= 49.946 amu, % of abundance = 4.35% ),…

Q: what mass (in mg) does 2.63 moles of nickle have?

A:

Q: Abundances 0.005% 0.720% 99.275% O a. 238.028 O b. 234 O c. 237 O d. 237.80 Relative masses…

A:

Q: A 4.09 g sample of calcium sulfide was decomposed into its constituent elements, producing 2.27 g of…

A: Given,  4.09 g  of 'CaS' sample  Which decomposes into  2.27 g of 'Ca' and 1.82 g of 'S'.  1.82 g…

Q: The ratio of the mass of O to the mass of N in N2O3 is 12:7. Another binary compound of nitrogen has…

A: Step 1        N2O3Mass of Oxygen in N2O3 = 16x3 =48gMass of Nitrogen in N2O3 = 14x2 = 28gMass of…

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.