If a penny is made of 2.56 grams of Copper, How many atoms of copper are in the penny?

Q: Which describes an atom of plutonium?A. It can be divided into smaller particles that retainall the…

A: A. It can be divided into smaller particles that retainall the properties of plutonium.B. It cannot…

Q: What is the atomic mass of oxygen-17 (16.9991 amu) at 0.038%

A: Using the formula We can easily get the answer

Q: What is the mass of 5.10*10^21 platinum atoms?

A: A mole represents 6.022x1023 particlesThe 6.022x1023 Number is also known as Avogdro's Number .It…

Q: How many atoms of neon are present in 1.30 moles of neon?

A:

Q: A sample of aluminum foil contains 7.80×10^23 atoms. What is the mass of the foil?

A: A sample of aluminum foil contains 7.80×1023 atoms. The mass of the foil is to be calculated.

Q: What is atomic weight?

A: The Matter is composed of the smallest unit known as an atom. The atom has 3 subatomic particles…

Q: How many protons neutrons and electrons are present in a single atom of osmium - 190?

A: Since the Atomic number of Osmium = 76  Hence number of electrons = Atomic number = 76

Q: How many sulfur atoms are there in 5.52 mol of sulfur?

A: Amount of substance is measured in mole. It is standard unit for measurement. 1 mole is equal to:…

Q: Can we tell the exact mass of a particular atom by looking at the periodic table

A: The periodic table is a table in which a total of 118 elements are placed on the basis of their…

Q: if a penny is made of 2.56 grams of copper, how many atoms of copper are in the penny?

A: Answer:- This question is answered by using the simple concept of calculation of number of atoms…

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: One atom of Se-77 is 6.410 times as heavy as an atom of C-12. What is the atomic mass of Se-77?

A:

Q: How many grams of Sc are there in a sample of Sc that contains 4.91×1023 atoms?

A: The atomic weight of scandium is 45 gram per mole. The number of atoms present in one mole of any…

Q: What is the difference between the atomic mass and the atomic weight?

A:

Q: How many protons, neutrons and electrons are present in an atom of 40Ca and 119Sn ?

A: The atoms considered are 40Ca and 119Sn.

Q: A helium nucleus has two protons and two neutrons. How many electrons does it take to equal the mass…

A:

Q: 2.5 million atoms of particular element have a mass of 8.33X10^-16 grams. What is this element?

A:

Q: A sample of aluminum foil contains 6.50×1023 atoms.6.50×1023 atoms. What is the mass of the foil?

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

Q: Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48…

A: Volume of brass 115.5 cm3convert this volume of brass into mass using density(d) = 8.48 g/cm3density…

Q: what are the grams in 6.15 x 10^22 aluminum atoms?

A: Ans  As we know that one mole of aluminium contains 6.023*1023 atoms So 23 g of aluminium contains…

Q: How many atoms are there in 182 g of Neodymium?

A: Atomic mass of Nd = 144.2 g/ mol

Q: How many protons, neutrons, and electrons are in an atom of strontium-90?

A: The atomic number of strontium is 38. The atomic number present in a neutral atom is always equal to…

Q: How many Se atoms are there in a 82.1 gram sample of Se ?

A:

Q: An element with 11 neutrons, 11 protons, and 11 electrons would have a mass number of _____?

A: The total number of neutrons and protons present in a nucleus is known as mass number.

Q: Potassium naturally consists of 93.10% K-39 and 6.90% K-41. K-39 has an atomic mass of 38.963707…

A:

Q: how many isotopes of bromine exist ?

A: Isotopes:The variants of a chemical element, which have same number of protons and differs in number…

Q: A 20.0 g sample of an element contains 4.95 * 1023 atoms. Identify the element.a) Cr…

A: The element has to be identified.

Q: How many grams of Xe are there in a sample of Xe that contains 8.97×1023 atoms?

A: First we have to determine the moles of xenon.

Q: What is the atomic weight of Nitrogen?

A: Given Nitrogen Atom. We need to determine the atomic weight of Nitrogen.

Q: An unknown element X has the following isotopes: 52X (90.00% abundant), ®X (8.00% abundant), 5°X…

A: Average atomic mass :-         Many naturally occurring elements exist in more than one isomer. It…

Q: A 2.25 mol sample of an element has a mass of 51.8 g. What is the element?

A:

Q: What is the atomic weight of the element chlorine?

A: Average atomic weight of chlorine element is 35.5 amu. Chlorine atom has two isotopes Cl35 and Cl37…

Q: If one charge is + 0.44 nC, what is the other charge?

A: One charge = + 0.44 nC  Other charge = ?

Q: How many helium atoms are in 541 kg of helium?

A:

Q: 5. What would 756 atoms of Iodine weigh in amu? -

A: The question is based on mole concept. We have to calculate mass of the given number of atoms of…

Q: If a penny is made of 3.11 grams of copper, how many atoms of copper are there in the penny?…

A:

Q: A sample of aluminum foil contains 8.00×10238.00×1023 atoms. What is the mass of the foil?

A:

Q: How many electrons would it take to equal the mass of aproton?

A:

Q: How many atoms would be present in a 894.22 amu sample of an element that weighs 11.28 amu per atom?…

A: Here we are required to find the number of atoms present in 894.22 amu of sample

Q: A sample of aluminum foil contains 8.00×10^23 atoms. What is the mass of the foil? mass of foil…

A: The number of moles for a given compound or a molecule refers to the ratio of its mass to the…

Q: A sample of aluminum foil contains 7.80×10237.80×1023 atoms. What is the mass of the foil?

A: Given that the number of atoms of aluminium is 7.80×1023 atoms. Number of moles of aluminium can be…

Q: An unknown element X has the following isotopes: ⁵⁸X (68.00% abundant), ⁶⁰X (26.00% abundant), ⁶²X…

A:

Q: Atoms

A:

Q: Naturally occurring copper is a mixture of 69.17% Cu@63 with a mass of 62.93 amu and 30.83% Cu@65…

A: Given,Realtive abundance of C63u isotope=69.17%=0.6917Realtive abundance of C65u…

Q: What is the mass (in grams) of one Ni-58

A: Given is number of atom = 1 Mole represent the quantity of fundamental particle.

Q: How many protons neutrons and electrons are present in a single atom of bromine-79?

A: Since the atomic number of bromine = 35  hence number of electrons = Atomic number = 35

Q: how many atoms of silver are in 100 grams of silver ?

A: Molar mass is the amount of a substance where 6.023×1023 no of atoms/molecules of that substance are…

Q: Suppose a new element is discovered and it has two stable isotopes. One isotope has a mass of 70.387…

A: It is given that there are 2 isotopes of an element with percent abundance and atomic mass as…

Q: Since 1983, pennies have been made with zinc and plated with copper. Prior to 1983, pennies were…

A: Since from 1793-1837 pennies were made up of pure copper therefore, if you had a penny from 1800…

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.