A compound is composed of phosphorus and hydrogen. The mass ratio is 10.2 g of phosphorus to 1.00 g of hydrogen. Which compound is consistent with the analysis? O PH6 O PH O PH2 O PH3

Q: What is the mass of 4.50 x 10- Cu atoms? Multiple Choice 7.47 x 10 amu 7.47 x 10 g 4.75 g 63.55 amu

A: Calculation of mass of cu atom:

Q: Rubidium has two naturally occurring isotopes, rubidium-85(atomic mass = 84.9118 amu; abundance =…

A: The element carrying dissimilar neutrons number or atomic mass which might be more or less than its…

Q: An imaginary element Xz consists of two isotopes having masses of 100.0amu and 102.0 amu. A sample…

A:

Q: An unknown element is a mixture of isotopes ¹²⁹X and ¹³²X. The average atomic mass of X is 130.13…

A:

Q: Consider two compounds. Compound A contains 15.7 g of sulfur and 18.6 of fluorine. Compound B…

A: Mass of fluorine in compound A = 18.6 g Mass of sulfur in compound A = 15.7 g Mass ratio of fluorine…

Q: Calculate the mass in grams of each elemental sample.(a) 1.32 * 1020 uranium atoms(b) 2.55 * 1022…

A: Mole is defined as the ratio of given mass and molar mass. The unit of mole is mol. It is utilized…

Q: The mass spectrum of an organic compound shows the relative abundances of M to be 58.98% and M + 1…

A: Given,Relative abundance of M+1=14.67%Relative abundance of M=58.98%Natural abundance of…

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: What is the mass of a 12.56L sample of carbon dioxide? O A. 17.9 g о В. 8.9 g O C. 4501 g O D. 24.7…

A:

Q: Bronze is an alloy with the following composition: Component Copper Nickel Zinc mass percentage 52.0…

A: Given  Mass percentage of Cu = 52%  Total mass of sample     = 2 gram  mass of copper              =…

Q: In each case, calculate the appropriate ratio to show that the information given is consistent with…

A: Given information, (a) Both ammonia (NH3) and hydrazine (N2H4) are composed of nitrogen and…

Q: 7. The atomic masses of 203TI and 205TI are 202.972320 and 204.974401 amu, respectively. Calculate…

A: Given,Atomic mass of 203TI (isotope I) = 202.972320 amuAtomic mass of 205TI (isotope II) =…

Q: What is the mass of 1 mole of zinc atoms? (the values may be rounded differently than your periodic…

A: The mass of 1 mole of zinc atoms has to be given.

Q: An unknown element is a mixture of isotopes 120X and 122X. The average atomic mass of X is 121.03…

A: ]Average atomic mass=Σ%abundance x mass of isotope100

Q: Assume silicon has three major isotopes in nature as shown in the table below.Fill in the missing…

A: Given the details of isotopes of Silicon: Isotope Mass (u) Abundance 28Si 27.98…

Q: Calculate the mass of 5.70 X 10^22 tungsten atoms.

A: Given No of atoms of tungsten = 5.70 x 1022   Also, Molar mass of tungsten =  183.84 g

Q: 1) How many aluminum atoms are there in 3.50 grams of Al,O;? (a) 2.45 x 1022 (b) 2.07 x 1022 (c)…

A: Answer :-  (e) 4.13 × 1022  The aluminum atoms present in 3.50 g Al2O3 = 4.13 × 1022 atom…

Q: Verify that the atomic weight of lithium is 6.94, given the following information: 6 Li, mass =…

A: Given,  Percent abundance of 6Li = 7.50% Mass of 6Li = 6.015121 amu Percent abundance of 7Li =…

Q: An element has three naturally occurring isotopes with the following masses and abundances (in…

A:

Q: The ratio of the mass of Oto the mass of Nin N2O3is 12:7. Another binary compound of nitrogen has a…

A: The given ratio of mass O to the mass of N in N2O3 is 12:7Mass of O in N2O3 = 3x16 amu…

Q: Chorine has 2 isotopes, 35Cl and 37Cl. A fellow student calculated the natural abundances of each…

A: Answer - According to the question - Given values are - Chorine has 2 isotopes,1 = 35Cl…

Q: Atomic Weights of the following elements: N = 14 amu Na = 23 amu C = 12 amu H = 1 amu O = 16 amu 1.…

A: Since you have posted multiple questions, we'll answer the first one. If you want any other…

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

A:

Q: A 1A 2A Atomic Number 8A E 1 A ЗА C 1 W J Zy 4A 5A 6A 7A 4 7 K V Ad 9. 10 11 12 13 14 15 Q U Ac Ab…

A:

Q: Use the periödiĉ tâblê from an Symbol 8A Atomic 1A 2A Number E ЗА C 3 J Zy 4A 5A 6A 7A 4 7 V Ad 8 9.…

A: Amount of product formed is calculated by amount of Limiting reagent taken initially.

Q: What is the mass of 1 mole of calcium atoms? (the values may be rounded differently than your…

A: 1 mole of calcium atom means 1 atom of calcium.

Q: [The volume of a sphere is (4/3)πr3 and the density of copper is 8.96 g/cm3.] A pure copper sphere…

A: Number of atoms in a mole of any substance is equal to Avogadro's number.

Q: 4. 4. purple How many elements are in sodium thiosulfate? yellow Na,s,O3 7. orange 5. 3 orange How…

A: Given that, We have to identify the number of elements in the following compounds. Na3S2O3 C12H22O11

Q: A 12.49 g sample of NaBr contains 22.34% Na by mass. Considering the law of constant composition…

A: Average atomic mass of the element = Mass of one isotope of the element x % natural abundance + Mass…

Q: A made up element ey has three natural isotopes. The isotopes each have an atomic mass of 33.02…

A:

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

A:

Q: An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.47…

A: For an element that exists as a number of isotopes, its atomic mass is calculated by taking an…

Q: Calculate the mass of one bromine atom. a. 6.022 x 1023 g O b.4 812 x 1025g O c. 1.327 × 10-22 g O…

A: Atomic mass is defined as the quantity of matter that is present in an atom of element.

Q: Naturally occurring thallium consists of two stable isotopes, Tl-203 and TI-205 atomic masses =…

A:

Q: A sample of Cs weighs 99.5 grams. Will a sample of S that contains the same number of atoms weigh…

A: 1 mole of any substance = 6.022 x 1023 atoms (Avogadro number)   No. of moles of a substance can…

Q: The natural abundances and isotopic masses of the element silicon (Si) relative to 12C 5 12.00000…

A:

Q: 3. What is the average atomic mass of hafnium given the following abundance information on its…

A: Average atomic mass can be determined by the equation given below: Avg.atomic mass =…

Q: Rubidium has two naturally occurring isotopes, rubidium-851atomic mass = 84.9118 amu; abundance =…

A: The element carrying dissimilar neutrons number or atomic mass which might be more or less than its…

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: 320 g of a certain chemical element contains 4.82 x 1024 atoms. Find the name of the element. MAr…

A: Given 320 g of a certain chemical element contains 4.82 x 1024 atoms

Q: What is the average atomic mass of an element that has 3 isotopes with the data below? Isotope…

A: Average Atomic mass=((molecular mass Isotope 1 x % abundance )+(molecular mass Isotope 2 x %…

Q: The relative abundance and atomic masses are 0.337% (mass = 35.978 amu) 0.063% (mass = 37.963 amu)…

A: Average atomic mass of an element is the sum of the masses of its isotopes each multiplied by its…

Q: Calculate the average atomic mass of oxygen. Its composition is 99.76% of atoms with a mass of 15.99…

A:

Q: The average mass of a boron atom is 10.81. You perform an experiment using mass spectrometry and…

A: Two questions each in nuclear chemistry and inorganic chemistry which are to be answered.

Q: 13) A 44.8 g rhodium sample contains how many rhodium atoms? B) 2.74 x 105 atoms A) 2.62 x 1023…

A:

Q: Boron has only two naturally occurring isotopes. The mass of boron-10 is 10.01294 amu and the mass…

A: Two or more distinct chemical substances of one chemical element containing equal numeral of protons…

Q: 107Ag Two naturally occurring isotopes of silver are (relative abundance 52.00%) and 109Ag (relative…

A: Isotopes are those atoms of an element that have same atomic number but different mass number.  Mass…

Q: 2.31 Use the following table of abundances and masses of five naturally occurring titanium isotopes…

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 atomic weight of Ga is 69.72 amu. There are 69.0 amu, and Ga, with a weight of 71.0 amu. The…

A: Let the percentage of the isotope 69Ga be =x%Then,The percentage of the isotope 71Ga is =(100−x)%

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.