There are two naturally occurring isotopes of boron (10 B or 11B). As. listed on the periodic table, the atomic weight of boron is _________(report your answer to 2. decimal places with the units of amu)

Q: The radioactive element carbon 14 has a 1/2 life of 5750 years a scientist determined that the bones…

A: let assume the initial concentration of C-14 as Co=100%

Q: Each atom in a crystal of aluminum metal occupies a theoretical cube that is 0.255 nmnm on a side.…

A: Solution-  Density of aluminum metal = 2.70g/cm3 So 2.70g of aluminium occupies 1cm3 volume Number.…

Q: Calculate the number of Ag atoms needed to span the diameter of a poker chip. Express your answer in…

A: Given : Diameter of Ag atom = 320 pm  The diameter of poker chip = 3.9 x 1010 pm

Q: the elements within group 13 have the same number of?

A: The required solution is as follows:

Q: To raise the temperature of 75.0 g of a particular metal by 1.50 °C requires 107 calories of heat.…

A: Specific heat: It is defined as the amount of heat required to raise the temperature by 1gm of a…

Q: An element has two isotopes. One isotope has a mass of 63.22g. The other has a mass of 67.88g. If…

A:

Q: 17. Sergio's teacher gave him a sample of a substance to identify. His teacher told him it is either…

A: Metal are hard , shiny, magnetic , and a good conductor of electricity .

Q: For the following isotope, selenium -77, indicate the number of protons, neurons, and electrons.

A:

Q: Boron has 2 commonly occurring isotopes. 19.9% of Boron atoms have 55 neutrons and 55protons,…

A: We have to calculate the expected mass of B.

Q: A fictional element X has 2 stable isotope, X-94 and X-96. The exact mass of X-94 is 94.000215 amu…

A:

Q: 2/17/2021 Chapter 2 Concept Check on Atoms and Isotopes Chapter 2 Concept Check on Atoms and…

A:

Q: The element stramonium (Sa, average atomic mass 628.23 u) reacts with the element kingsine (Ks,…

A: Mass of one molecule of SaKs7 = ( average atomic mass of Sa )+ ( 7 X average atomic mass of Ks )…

Q: udent. GElk Grove Unified - My Profile - Zoom V Results of the chec. My Citation list 9/2. O Pearson…

A:

Q: There are two naturally occurring isotopes of Chlorine, 35Cl, 37Cl with masses of 34.97 amu and…

A: Given data,Mass of 35Cl=34.97amuMass of 37Cl=36.966amuAverage atomic mass of Cl=35.453 (taken from…

Q: What did the scientist say when he found 2 isotopes of helium?

A: There are two isotopes of helium. He-4 and He-3 are the two isotopes of helium.

Q: An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99…

A:

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

A:

Q: [Atomic Weights: Zn 65.39 amu S 32.07 amu O 16.00 amu Report Table Express each number to the…

A: (a)Mass of empty crucible = given in data table = 23.578 gram (b) Mass of crucible+unknown = 27.432…

Q: Thank you! Required info: The mass of 1 mol of 13C (carbon-13) is 13.003 g a) what is the mass in u…

A:

Q: Which of the following contains the highest number of atoms? A) 1 mole of helium B) 1 mole of carbon…

A: 1 mole = 6.022×1023 = Avogadro's number Anything which is present in the number of 6.022×1023 is…

Q: A hydrogen-filled balloon was ignited and 1.70 gg of hydrogen reacted with 13.6 gg of oxygen. How…

A:

Q: A 7.08 gsample of copper is contaminated with an additional 0.80 gof zinc. Suppose an atomic mass…

A: To calculate the atomic mass, first it is required to calculate the moles of copper and zinc, which…

Q: Antimony (Sb), has two naturally occurring isotopes: Sb-121 that has a percent abundance of 57.30 %…

A: Given: Antimony (Sb) has two isotopes Sb-121 and Sb-123 Mass of Sb-121 =120.90 amu Percentage…

Q: 1. Pereent abundance A. Calculate the average Mass of Ni'? 1 100 60 (242351 20 (10%) 38 62 64…

A: A question based on atomic structure, which is to be accomplished.

Q: Antimony (Sb), has two naturally occurring isotopes: Sb-121 that has a percent abundance of 57.30 %…

A:

Q: The isotope of Nitrogen with a mass of 15amu is written as _? The isotope of Uranium with a mass of…

A:

Q: SISAI s performed three tim dents for the mass of 361g, and 0.2341g. T mass of silver is 0.52

A: Gravimetric analysis  quantitative  chemical analysis and steps involved in this method is  1.…

Q: In any neutral Adam there are equal numbers of? A. Neutrons and electrons B. Protons and neutrons…

A: Neutral atom are those having not any charge. They are wholely neutral

Q: Sample

A: Given data set: Initial mass of the radioactive metal = 1024 grams Final mass of the radioactive…

Q: . In the following figures, the open circles represent atoms of an element and the filled circles…

A: Dalton’s Atomic Theory: Dalton's Atomic Theory is based on law of conservation of mass and the law…

Q: ! 1 ső: F1 6 Q 5 ОН 3 CH2OH OH 2 ** F2 W #3 ОН 1 2 ОН 80 F3 E $ 4 a F4 R 07 8⁰ % 5 16 T A 6 MacBook…

A: ->An anomeric carbon can be identified as the the carbon bonded as the carbon bonded to the ring…

Q: graphical information (socioeconomic background, family, education), his inital research focus, and…

A:

Q: a) How many protons does Promethium-145 have? b). How many neutrons does Promethium-145 have?…

A: Given :  Mass number of Promethium = 145  Atomic number of Promethium = 61  Half life of Promethium…

Q: A newly found element, Savannium, is composed of three different isotopes. In every sample, there is…

A:

Q: 14. Which of the following cquations represents the law of conservation of mass? A. H20- H2 + O2 B.…

A: Law of conservation of mass states that during any physical or chemical change, the total mass of…

Q: There are only two naturally-occuring stable isotopes of chlorine. The mass and natural abundance of…

A: Average atomic mass (AAM) :  AAM =isotopic mass x abundance 100   To find the mass of second…

Q: 2.A student says,“A carbon atom is not the smallest possible amount of carbon, because atoms are…

A: Atoms are made up of smaller particles like electrons, protons and neutrons. Similarly, a carbon…

Q: 7. A fictitious element which we will call dearbornium (Db) is made up of two isotopes. A sample of…

A: Given that : For the element dearbornium (Db) in a sample : Number of atoms of 292Db = 2233  Number…

Q: 70: Find the masses of P O, and P,O,0 10

A:

Q: A new synthetic element is found to have two isotopes. One isotope has an abundance of 68.2% and a…

A: Given: Abundance of 1st isotope = 68.2% Abundance of 2nd isotope = 31.8 % Atomic mass unit of 1st…

Q: 100% Normal text Oxygen 12 ... 3. The atomic masses of elements are generally not whole numbers.…

A: Concept is based on isotopes:     As per our guideline we have to answer first question only.

Q: Earth’s surface area is 5.10x10^8km², and its crust has amean thickness of 35 km and mean density…

A: Determine the volume of crust and total mass of crust of earth in metric tons using its density.…

Q: Mass of magnesium before is 0.33g Mass of magnesium after is 0.49 g   Identify major sources of…

A: Interpretation -  To explain about how the mass of magnesium is differ too much before weighing…

Q: For 223FT, number of protons = number of neutrons = + and number of electrons = For 227 Fr, number…

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

Q: Chromium reacts with oxygen to form three different compounds, X, Y and Z. It was found that, for…

A: Given: mass of Cr in X, Y and Z is 1 g. mass of O in X = 0.308 g mass of O in Y = 0.462 g mass of O…

Q: Nitrogen (N), has two naturally occurring isotopes: N-14 that has a percent abundance of 99.63 % and…

A: The atomic mass of Nitrogen = ( mass of N-14 X percent of N-14 + mass of N-15 X percent of N-15) /…

Q: An imaginary atom has only 2 isotopes and an average atomic mass of 74.48 u. If Isotope 1 has a mass…

A: Given: Average atomic mass of element = 74.48 u. Mass of isotope 1 = 73.95 u. And the mass 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.