Seawater contains 2.80 x 10-8% (by mass) of carbon. How many grams of carbon are there in 3.52 L of seawater? The density of seawater is 1.025 g/cm.

Q: How many protons, neutrons and electrons are in one atom of 70/30Zn?

A: We have given that  atom   3070Zn   We know that Representation of an element                Z AX…

Q: A sample of iron weighing 15.0 g was heated with potassium chlorate (KCIO3) in an evacuated…

A:

Q: is a naturally occurring radioactive gas that seeps up from the ground and is potentially toxic to…

A: Radioactive elements are the elements that emit atomic radiations and their nuclei are unstable.

Q: Gold-198 is used in the diagnosis of liver problems. If you begin with 2.8 milligrams of this gold…

A: Given : Half - life = 2.69 days Initial amount = 2.8 mg Time = 10.8 days.

Q: 3H,SO, Al2(SO4)3 + 3H2 AL,(SO.), NR NiCl, -NR H,SO, ZnSO4 + H2 SnCl, --MgCl2 + Sn for Halogens ch…

A: In the balanced chemical reaction,   The  number of atoms of each element in product side is equal…

Q: Is there another method to determine lead in shells without needing digestion? Explain the principle…

A: A question based on analytical process that is to be accomplished.

Q: Alpha particles are deflected along hyperbolic paths when they are directed towards the nuclei of…

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Q: TRUE OR FALSE 1. The age of fossils can be traced using isotopes C12 and C14 called Carbon dating…

A: Radiocarbon dating is based on the simple principle that all living things absorb carbon from the…

Q: Ti-48 is produced by alpha decay

A: Formula of α particle is He24. Hence release of He24 indicates loss of mass number by 4 unit and…

Q: If you react 5 moles of oxygen with a gallon of gasoline, how many moles and grams of Co2 will be…

A:

Q: What element does *Ra-224 become when it loses an alpha particle (an alpha particle contains 4…

A: The theory of radioactive disintegration states that all radioactive elements undergo spontaneous…

Q: The density of ground uranium in a particular contaminated field is 0.02 mg/m3. A loader with a 24…

A: Solution Given data :- density of uranium in the field = d = 0.02 mg/m3 volume of bucket = V = 24 m3…

Q: Was radioactivity invented during World War II in the 1940s by atomic scientists?  Justify your…

A: NO.....  The full information is...  In one of the most well-known accidental discoveries in the…

Q: Fill in the missing symbol in this nuclear chemical equation. 238 234 90 Th + 92 U 00 X ?

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Q: ng nuclear equations.

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Q: What is B-10's atomic weight?

A: The Boron is an element which is a metal and it consists of two isotopes B-10 and B-11. The stable…

Q: Radioactive sodium-24, administered as 2"NaCl, is given to treat leukemia. If a patient must receive…

A: The dose of the sodium-24 isotope (leukemia treatment) needed by the patient = 190µCi/kg Activity of…

Q: 18.5 How many moles are in a 2.40 cm × 2.40 cm × 2.40 cm cube of copper?

A:

Q: 8 (a) Define in words the following: (i) Ka (ii) pKa

A: Given,  (i) Ka and  (ii) pKa

Q: How many milligrams of a 40 mg sample of cesium-137 remain after 120 years? Express the mass to two…

A: The half life of Cs -137 is about 30.17 yrs.   The radioactive decay follows first order kinetics

Q: A sample of Fe_20_3 (MW= 159.69 g/mol) has a mass of 0.277 g. What is the mass of Fe in the sample?…

A: Molar mass of compound is individual sum of atomic mass of each atoms present in compound

Q: Balance the following nuclear reaction: 96 148 Ce O a. 58 O b. 151 Ce 58 148 Xe C. 58 O d. 148 Xe М…

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Q: Disintegrate or decay mean that radioactive elements disappear as they emit radiation and are…

A: The given statement is true

Q: While studying the properties of a sample of material obtained from an excavation site, you discover…

A: A gamma ray, or gamma radiation (symbol γ or. ), is a penetrating form of electromagnetic radiation…

Q: Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of…

A: Coal contains carbon and other elements. Coal when burnt with oxygen then formation of carbon…

Q: The mercury-201 nuclide radioactively decays by electron capture. Write a balanced nuclear chemical…

A: Given : We have to write equation for electron capture.

Q: Which element is able to combine in many ways with different elements and is therefore considered…

A: There are 118 elements identified by the scientists. Out of the total 118 elements, 94 are found…

Q: 2. Balance the nuclear reaction that allows for radiocarbon dating is the continual formation of…

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Q: energy

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Q: How long would it take, in minutes, for the amount of lead-196 to decrease from 80.0 mg to 10.0 mg?

A: Since we know that radioactive isotope decay occurs by first order reaction . So using half life…

Q: Which of the following is not a radioactive element? a. Plutonium b. Thorium C. sulphur d. Uranium

A: The radioactive elements are those which have unstable nuclei and give off atomic radiation to gain…

Q: Atoms X, Y, Z, and R have the following nuclear compositions: 412 R 410 Y 183 412 Z 186 410 X 186…

A: Isotopes of any element have same atomic number but different atomic mass. i.e. isotopes of any…

Q: Chemical properties of ( Carbon-11 ) ?

A: We have to write Chemical properties of  Carbon-11

Q: What proportion of the 14C present in Otzi's body when he died is still there today? When he died,…

A: The half-life time of carbon-14 is about 5,730 years.  Thus a sample that had 1/4 of its original…

Q: Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of…

A: When coal burn there is a chemical reaction takes place. It is a chemical reaction. It's best…

Q: Studying the decay of radioactive isotopes in dead organisms helps scientists to identify fossilized…

A: A nuclear reaction involves the conversion of the nucleus with the emission of certain nuclei or…

Q: (2) (3) If an atom with 38 protons undergoes B-decay, the species formed will have, (A) 37 (B) 38…

A: The nucleus undergoes these emission reactions due to more number of neutrons than protons in the…

Q: How much will 1.9 moles of Carbon weigh in grams?

A: Given that, Moles of Carbon = 1.9 mol Molar mass of C = 12 g mol-1 Then,

Q: What do you understand by carbon footprints? Explain the procedure of calculating carbon

A: Carbon footprint is the amount of carbon dioxide released in the atmosphere as a result of the…

Q: what does it mean for fossils to have 10% carbon 14 ?

A:

Q: Provide the practical uses of the following:    1) Carbon 14   2) Uranium - 238   3) Iodine -…

A: All the elements provided are radioactive and give different elements on transmutation.

Q: How many moles of carbon are there in a diamond weighing 2.11g

A: Mole is defined as a unit of measurement for the amount of substance in the International System of…

Q: What is properties chemical and physical of ( Carbon -11 )

A: Isotopes generally have similar chemical and physical properties only there is single difference…

Q: (A) if both sentences are true, (B) if both sentences are false, (C) if the first sentence is true…

A: True false

Q: How many protons, neutrons, and electrons are present in 108 47X ?

A: Given Element = X         Mass number     = 108  Atomic Number        =  47  Number of proton    =…