How many moles of titanium are present in 124 g of titanium?

Q: how many helium atoms are there in a helium blimp containing 536 kg of helium?

A: moles and number of atoms are related to each other by Avogadro's numberSo, one mole of every…

Q: Complete the table

A: Electrochemical cells / Galavanic cells / Voltaic cells :  In these cells chemical energy is…

Q: what is the chemical formula for potassium phosphate

A: Potassium phosphate is a common term for salts of potassium and phosphate ions.

Q: A sample of mercury with a mass of 114.0 g was combined with 12.8 g of oxygen gas, and the resulting…

A: The reaction taking place is  2 Hg + O2 -----> 2 HgO Hence from the above reaction we can say…

Q: complete the table

A: If organic compound contains double bond (or) triple bond (unsaturation) reacts with Br2 , this…

Q: What is the amount, in moles, of each elemental sample? 0.211 g Li

A:

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: Define the term Neutron-to-Proton Ratio?

A: To find: The Definition of Neutron-to-proton ratio

Q: A mass of 41.6 g of an element is known to contain 6.59 x 1023 atoms. What is the atomic mass of the…

A:

Q: What is the mass of 4.97×1021 platinum atoms?

A: Mass has many units. Its SI unit is Kg. On atomic level, atomic mass unit, molar mass, molecular…

Q: Determine the number of atoms in a 1.00 mg sample of Carbon-14?

A:

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 sample of a uranium compound is found to be losingmass gradually. Explain what is happening to the…

A: Uranium is a radioactive element which disintegrates spontaneously.

Q: How many grams would 4.15 x 1021 atoms of Pb weigh?

A: Answer

Q: what mass of sodium is also produced?

A: Given :- 2Na3N → N2 + 6Na  Mass of N2 produced = 29.7 g  To calculate :-   Mass of sodium (in g)

Q: If the same mass of metal was used in the experiment, how would the volume of hydrogen gas produced…

A: Given ; both metals have equal mass used in experiment

Q: Y What element is represented in question 33? O Sodium O Boron O Carbon O Sulfur

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: Complete the table.

A: Given equation is : Also, Rate of reaction = 0.010 M/s

Q: Determine the number of atoms that would make up a 78.8 g sample of Tellurium.

A:

Q: How many protons are contained in a circular puddle of liquid mercury that is 6.25 inches wide and…

A: In the given question we have to calculate the number of proton contained in a circular puddle of…

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

A:

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: The largest element of the following is O Tungsten O Molybdenum O Germanium O Krypton O Chromium

A: As we go from left to right and top to bottom in a periodic table there is a change in the…

Q: Determine the number of protons and the number of neutrons in isotope. 2311Na

A: The number of protons and the number of neutrons in isotope 2311Na can be identified as, Atomic…

Q: Atomic # for uranium is 92 how many protons, electrons, neutrons in isotope U- 96?

A: Given that, Atomic number of U is 92.

Q: What is the mass, in grams, of each elemental sample? 43.9 mol Xe

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

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: Calculate the number of atoms of Zn in a sample with mass = 2811 amu.

A: We have to predict the number of atoms of Zn.

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

A:

Q: If a sample of silver contains 1.29×104 atoms of silver-107 and 1.20×104 atoms of silver-109, what…

A: The percentage of silver-109 in the sample can be calculated by using the formula Percentage of…

Q: What is the mass, in grams, of one argon atom ? 6.64x10^23g

A: The mass of one atom can be calculated by dividing molar mass by avagadro number.

Q: The total number of atoms in 2CaCI

A:

Q: A sample of 6.000 g of nitrogen can be combined with 6.857 g of oxygen to form nitric oxide gas…

A: To Find: To find out the mass of oxygen required to react with  nitrogen to form nitrogen dioxide.

Q: noble gases are also considered to be rare gases. why?

A: Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn) are called rare gases…

Q: 6. What is the mass of 6.20 x 1025 atoms of sulfur?

A: We have 6.2*1025 atoms of sulphur , we have to calculate the mass of given atoms of sulphur.

Q: 20. What is the approximate total number of atoms in 1.0 mole of lithium?

A: Lithium is an element from the group 1 alkali family.  Lithium is having an atomic number of 3 and…

Q: What is the average mass of a single aluminum atom in grams

A: We know that mass of 1 mole of Aluminium atoms is equal to 27g Also 1 mole of aluminum atoms means…

Q: atomic mass of an element related to its molar mass?

A:

Q: Calculate the number of atoms in a 2.70×1032.70×103 g sample of strontium. number of atoms:

A: Gram atomic mass of strontium is 87.62 g.

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

A: Atomic number:The atomic number of the element is the number of protons present in that element.Mass…

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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 the number of atoms in element Pt?

A: The Pt symbol is used for the platinum and it is a member of the VIII B group thus it is a…

Q: A mass of 18.6 g of an element is known to contain 4.84 x 1023 atoms. What is the atomic mass of the…

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.