a. Using the average atomic mass of carbon, calculate the mass (in amu) of 165 carbon atoms. amu b. Using the average atomic mass of potassium, calculate the mass (in amu) of 8.70 × 106 potassium atoms. amu c. Using the average atomic mass of lithium, calculate the mass (in amu) of 3.40 × 1023 of lithium atoms. amu

Q: etermine the number of atoms in 37.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Mass of sodium =37.0g Atomic mass of sodium = 22.99g/mol Moles of sodium = 37.0g/22.99g/mol = 1.61…

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

A: Grams of 124Sn present in 38.3 g sample     = 38.3*(5.80/100)= 2.22 g

Q: A sample of Cu weighs 64.6 grams. Will a sample of Zn that contains the same number of atoms weigh…

A:

Q: 1. a) Boron, ¹B has relative atomic mass of 10.81 amu and its mass number is 11 amu. Explain why the…

A: Q1. Given: Boron-11 has: Atomic mass= 10.81 amu Mass Number = 11

Q: As we saw in the previous problem, lithium has two naturally occurring isotopes: Li-6 (natural…

A: The mass which is closest to the atomic mass of Li has to be given.

Q: 90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in…

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

Q: An unknown element X has the following isotopes: ¹⁰X (20.00% abundant) and ¹¹X (80.00% abundant).…

A: The term isotopes can be defined as the variants of a given chemical element that differ in neutron…

Q: A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms. What is element X?

A: Given,      A 64.36 g sample of XO2 contains 25.79 g of oxygen atoms . To determine the identity…

Q: A sample of aluminum foil contains 4.50×1023 atoms.4.50×1023 atoms. What is the mass of the foil?

A: Given,  Number of atoms of Al foil = 4.50 x 1023 atoms  Mass of the Al foil = ?

Q: A. Calculating Average Atomic Mass 1. Lead has four naturally occurring isotopes: Three isotopes of…

A:

Q: Tur Enter numeric value al used in the filaments of incandescent light bulbs. Naturally occurring…

A:

Q: 5. Calculate the average atomic mass of Nitrogen (verify in the periodic table) 14N 14.003 u 99.6%…

A: Given,  14N      14.003 u         99.6% 15N      15.000 u          0.4%

Q: An unknown element X has the following isotopes: 25X (80.50% abundant, mass = 25.03 amu) and 27X…

A: isotopes of X 25X: abundance - 80.50%                       (P1) = 80.50/100 = 0.8050          mass…

Q: Determine the number of atoms in 33.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Also, Number of atoms…

Q: Convert 1.89 • 1024  atoms of carbon to coles of carbon

A: Given, the number of moles of carbon atoms = 1.89 x 1024 atoms 1 moles of carbon atom = 6.022 x 1023…

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

A:

Q: olecule in units

A: Dear student I have given answer to your question in the image format.

Q: An unknown element X has the following isotopes: ²⁵X (80.50% abundant, mass = 25.03 amu) and ²⁷X…

A:

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: An element consists of two isotopes and has an average atomic weight of 85.561 a.m.u. The abundance…

A:

Q: Determine the number of atoms in 25.0 grams of sodium, Na. (The mass of one mole of sodium is 22.99…

A: Given, the mass of one mole of sodium is 22.99 gwe are asked to calculate the number of atoms in…

Q: Determine the number of protons and the number of electrons in each ion.a. Al3 +               b.…

A: The electronic configuration for a given atom can be defined as the representation of the…

Q: An unknown element X has the following isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant). What…

A: Given :  element X has the isotopes: ²⁵X (80.5% abundant) and ²⁷X (19.5% abundant).  Since Atomic…

Q: b. x The element's symbol is It has protons. It has neutrons. c. 20X The element's symbol is It has…

A: Given symbols are:- 12854X and 4220X AZX Here, A is atomic mass and Z is atomic number.  128…

Q: A pure titanium cube has an edge length of 2.76 in. How many titanium atoms does it contain?…

A: Here, we have to calculate number of titanium atoms.

Q: Using the average atomic mass of magnesium, calculate the mass (in amu) of 4 magnesium atoms. amu…

A: Atomic mass of magnesium= 24.305 amu  Atomic mass of iodine= 126.90447 amu  1 mole = 6.022 x 1023…

Q: 35 1. The atomic masses of 17CI (75.53%) 37 and 17CI (24.47%) were 34.968 amu and 36.956 amu,…

A:

Q: 8. Antimony has two naturally occurring isotopes. The mass of antimony-121 is 120.904 amu and the…

A: The question you provided pertains to the determination of the abundance of two naturally occurring…

Q: Q1. a- Please calculate, how many atoms exist in 1 cm^3 of Copper (Cu) with the density 8,93 gr /…

A: denisty of Cu = 8.93 g/cm3 Therefore in 1cm3 of volume 8.93 g of copper has been occupied(8.93 g /…

Q: 4. Antimony has many uses, for example, in infrared devices and as part of an alloy in lead storage…

A:

Q: 1. Complete the table Isotope Mass (amu) Relative Abundance (%) Silicon- 28 27.97693 92.21 Silicon-…

A: For this problem We have to complete the given table based on abundance of isotopes.

Q: D Suppose that fictional element X has an average atomic mass of 74.029 u. Element X has two…

A: Given -> Average atomic mass = 74.029 u Isotope -1 has mass(m1) = 72.021 u Isotope -1 has…

Q: . Using the average atomic mass of carbon, calculate the mass (in amu) of 227 carbon atoms. amu .…

A:

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

A: We have to calculate the mass of atoms from the average atomic masses of the given atoms.

Q: The natural abundances and isotopic masses of the element neon (Ne) areIsotope               %…

A: Average atomic mass is equal to the product of % abundance and isotopic mass. Average atomic mass is…

Q: CI has two isotopes; 17CI in 10 % , 18CI in 70%. and 15CI in 20%. The average atomic mass of Cl…

A: In this question, we want to determine the average atomic mass of Cl atom. You can see details…

Q: 5. Copper exists as a mixture of two isotopes. Copper-63 is 69.17% abundant and it has mass of…

A: Atomic Mass = (Mass of Isotope1 x Abundance of Isotope1) + (Mass of Isotope2 x Abundance of…

Q: b. An atom that has a mass number of 39 and contains 19 protons. Potassium C. An atom with mass…

A:

Q: Which of the following statements is TRUE? An atonmic 24

A: First statement is wrong, because atomic mass unit (amu) is mass of 1/12 th mass of one 12 C atom.…

Q: How many isotopes does this element have?

A: From the graph, it is cleared that the number of isotopes of the unknown element is 5.

Q: 1. Nuclear Symbol Protons Neutrons Electrons 107 47A 109 47Ag

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: Give the complete symbol (X), including atomic number and mass number, of a. a manganese atom with…

A: The general method to write the symbol of an element is given as shown below. XZA Here, A is the…

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.