an unknown halogen has a mass of roughly 160 g at standard temperature and pressure.  Which is the identity of the halogen?

Q: Potassium naturally consists of 93.10% K-39 and 6.9% K-41. Calculate the atomic mass for Potassium.

A: Given that, % abundance of K-39 = 93.10 % = 0.9310  % abundance of K-41= 6.9 % = 0.069  Then,

Q: Balance each reaction and write its reaction quotient, Qc:

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

Q: The mass of 6 million molecules of a diatomic gas is 5.1  × 10-19 kg. What is the atomic mass of the…

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: 6. A solid circular cone made of pure platinum (d = 21.45 g/cm³) has a diameter of 2.75 cm and a…

A: To calculate mole=mass/molar mass For Calculate electron  78electron present in 1 atom of platinum…

Q: What are the 50 elements and their symbols?

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: (1) Either 2 + 2 is 0 or gold has atomic number 79; (2) 2 + 2 is not 0; thus, (3) gold has atomic…

A: The Good argument3)Gold has atomic number 79which is good argument1) & (2) are not good…

Q: 10:51 1 l LTE [cK-12 License 13. The atoms in the air are called. , and they are very a. noble…

A:

Q: Figure 3. Diatomic molecules of the element chlorine, Cl2. This Figure 4. Molecules of the compound…

A: ⇒All atoms are made up of tiny particles ie,protons,neutrons and electrons⇒A n element is a pure…

Q: Carbon exists as 3 isotopes. It is 88% C-12, 1% C-13 and 11% C-14. What is the average atomic mass…

A: average atomic mass= isotop% multiplied by atomic mass /100

Q: Which of the following has the greatest number of electrons?   a. Ca2+   b. K+   c. Cl-   d. S2-…

A: Number of electrons in Ca2+ = 20 - 2 = 18 e- Number of electrons in K+ = 19 - 1 = 18 e- Number of…

Q: The element X in a compound was involved in a chemical reaction. After the reaction was completed,…

A: Given: Element X undergoing a chemical reaction.

Q: 7. 12.01 g of carbon has approximately 602,214,129,000,000,000,000,000 atoms. What is the…

A:

Q: A hydrogen atom, which has one electron, has a radius 0.7 x 10-10 m. The radius of its nucleus is…

A: Atomic number of hydrogen atom is 1 and consists one proton in the nucleus. And one electron is…

Q: 1. To convert 20g of ice at -5oC to 120oC to steam you need __________ cal of energy? Assume…

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

Q: Rubidium has two naturally occurring isotopes, from the following data calculate the value of X?…

A: Since, you have asked multiple questions, we will solve the first question for you.  In Question-1,…

Q: Mass of the crucible and cover Mass 34.7816 134.76516 34.7658. After 1ª heating After 2nd heating…

A: A numerical problem based on heating experiment, which is to be accomplished.

Q: 47. List the name and the atomic number of each element.(a) Mn(b) Ag(c) Au(d) Pb(e) S

A: The atomic number is the number of protons found in the nucleus of the atom of that element. Every…

Q: 3. What is the symbol for the element in group 7 and series 5? a. Nb b. Db c. Te . Bh e. None of the…

A: In the periodic table, group 7 elements are Mn, Tc, Re and Bh. In the above elements, Tc is present…

Q: When trying to identify an unknown element, a scientist determines what other elements the unknown…

A: To identify the unknown elements, its chemical properties should be studied.  Chemical properties…

Q: What is the charge on the electron, the proton, and the neutron, respectively? a.-1, +1, +1 b. -1,…

A: Write charge and mass of electron, proton and neutron ---

Q: Last, need help with question Number 5

A:

Q: A 0.383 g sample of an element contains 1.943 × 10 21  atoms. What is the element symbol

A: Given, amount of sample =0.383 gnumber of atoms of the sample =1.943×1021 atomswe are asked to…

Q: Which group of three elements contains a transition metal, a halogen, and noble gas? a) S, I, Cu b)…

A: Since the Halogen elements are F, Cl, Br, I, At And noble gases are He, Ne, Ar, Kr, Xe, Rn

Q: Rubidium has two naturally occurring isotopes, from the following data calculate the value of X?…

A: B. 84.9545 Given that,  Atomic mass isotope of rubidium with 0.7285 fractional abundance = x Atomic…

Q: Which element is a halogen? (a) Ne (b) O (c) Ca (d) I

A: The substances that have a tendency to occupy space are considered as matters. The matters can be…

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

A: Density of a substance is given by the ratio of mass to its volume. Density = MassVolume Volume of a…

Q: A meteorite found in central Indiana contains traces of the noble gas neon picked up from the solar…

A: The average mass of an element can be defined as the sum of each individual isotope's mass…

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

A: Formula is  Avg atomic mass = (%abundance×mass)1+(%abundance×mass)2 so do this all there Isotope of…

Q: Which element is not a main-group element?a) Se                      b) Mo                     c) Sr…

A: Main-group elements: S-block and P-block elements are knows as main-group elements. They are,…

Q: 10. Copper has two naturally occurring isotopes, 6Cu (isotopic mass = 62.9296 amu) and 6Cu (isotopic…

A: Atoms of the same element having same atomic number but different mass number are called as…

Q: An atom of rhodium (RhRh) has a diameter of about  2.7×10−8cm2.7×10−8cm. How many RhRh atoms would…

A: Given : Diameter of Rh atom = 2.7 X 10-8 cm And the distance to be covered = 6.0 μm = 6.0 X 10-4 cm…

Q: 13. Consider the table below. What is the relative abundance of isotope A? Isotope Abundance A 65 B…

A: Abundance of A (Abd A) = 65 Abundance of B (AbdB) = 115 Abundance of C (AbdC) = 20 Total Abundance…

Q: a. P4 (s) + 6 Cl, (g) → 4 PCI, (1I) b. PCl,(g) +3 NH, (g) → P(NH,), (g) + 3 HCl (g) c. 2 H,O, (1) >→…

A:

Q: what are 2 incompatible elements? are calcium and chlorine incompatible?

A: Rubidium, Barium, Uranium, and Lanthanum are incompatible elements.

Q: Consider the following data for the element Z. what is a) percent of abudance and average mass (in…

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

Q: The vast majority of the ISM, both by volume and by mass, is made up of this element, found at many…

A: ISM means Interstellar medium. It consist of matter and radiation that exist between the spaces of…

Q: An atom has a very small nucleus surrounded by an electron "cloud." The figure below represents the…

A: The diameter of the nucleus is given that 2 mm. The electron cloud or diameter of atom is 200m. That…

Q: A fictitious element X has a molecular weight of 9.46 g/mol. If the volume occupied by one atom of…

A: We have given that the a fictitious element X has a molecular weight of 9.46 g/mole and the volume…

Q: 37. Which of the following statements is not correct? A. A cation is formed when an atom loses one…

A:

Q: What is the average mass of a single aluminum atom in grams

A: We know that mass of 1 mole of Aluminium atoms is equal to 27g Also 1 mole of aluminum atoms means…

Q: 12C and 14C area. atoms of different elements.b. isotopes.c. atoms with different atomic numbers.d.…

A: Given substances are : 12C and 14C  Options are : a. atoms of different elements.b. isotopes.c.…

Q: Calculate the number of atoms in a 2.70×1032.70×103 g sample of strontium. number of atoms:

A: Gram atomic mass of strontium is 87.62 g.

Q: Hydrogen sulfide is a gas with the odor of rotten eggs. The gas can sometimes be detected in…

A:

Q: Determine the a) natural abundance of isotope 1 and the b) average mass of the element (in amu) and…

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

Q: A hypothetical element Q (atomic mass: 142.61) consists of two stable isotopes: 45.3 % isotope A…

A: Relative abundance of isotope A is 0.453(45.3%) and hence, relative abundance of isotope B is 0.547…

Q: 9. Variations in average atomic mass may be observed for elements obtained from different sources.…

A: Two sources of Lithium have been given. Average atomic mass for each of these two sources have to be…