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# What is the mass in grams of a single atom of helium.

molecular weight of Helium or grams The molecular formula for Helium is He. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Helium, or 4.002602 grams. Jan 26, 2012 · Gram atomic mass is also termed as one gram mole. So 6.023 x 1023 atoms weigh 12 g. Then one atom's mass ie mass of one atom will be 12/ 6.023 x 1023 = 1.9923626 x 10-23 g. If the molar mass is 4g then 1 mol of Helium has a mass of 4g. 1 mol of Helium corresponds to 6.022 x 10^23 atoms of Helium. Therefore 6.022 x 10^23 atoms have a mass of 4g in total. You were right to think 10^21 kg was too big. Different varieties of atoms weigh different amounts—helium weighs one thing, lead another. But how can the weight of any sort of atom be determined to within reasonable accuracy? We present two simple methods to calculate atom weight. Two Ways. One can calculate atom weight from knowing the weights of the constituent electrons, protons, and.

Marlene S. answered • 09/10/16 A mole of helium has a mass of 4.0026 grams A mole of helium has 6.02 x 10 23 atoms 4.6x10 20 atoms 4.0026 g/6.02x10 23 atom = 3.058x10 -3 g. According to the Harvard table of physical and astronomical constants, the weight of 1 atom of helium is 4.00260325415 amu, where 1 amu is 1.6605402-10^24 grams. Therefore, we can find out the weight of 1 helium atom in grams as follows: 4.00260325415 x 1.6605402-10^24 grams = 6.64648360817-10^24 grams.

Aug 05, 2010 · Best Answer: grams are too large a unit for measuring atoms' weight. If eleven players get on a truck scale and together weigh 1100 kilos, divide 1100 by 11 to get 100 kilos per player. Don't let the g/mol and atoms/mol confuse you.. Aug 31, 2016 · If you say 10 grams OF atoms, it can be 10 grams of any atoms. Could be 10 grams of Hydrogen atom or Oxygen atoms or Na atoms. And the number of atoms in each of this samples will be different. When u say "gram atoms" it is a technical term. It means a particular number of atoms. This number is called Avogadro Number. Using Avogadro's number, we know there's 6.0221415 × 1023 atoms per mole, so if you divide the standard atomic weight of magnesium by Avogadro's number, you can get number of grams per atom.

Jan 24, 2011 · 6 3. 72 4. 2 5. 12 3Based on the atomic weight scale that we use today, how many times heavier is an atom of copper compared to an atom of oxygen? 1. 3× 2. 4× 3. 1× 4. 2x 4Based on the atomic weight scale that we use today, how many times heavier is an atom of calcium compared to an atom of helium? Jul 08, 2010 · The mass of one atom of helium is: 1. 2.0 x 10-24 g. 2. 1.2 x 10-25 g. 3. 1.6 x 10-24 g. 4. 6.6 x 10-24 g. which one is it? i thought it wouldve been 4 but yeah not one of the options. The molar mass of helium is 4g Determine the mass of a single atom of helium in kilograms 4/1000 x 6.02 x 10^23 = 2.41 x 10^21 kg This looks too. Jun 23, 2016 · Avogadro's constant says that 1 mole of any atom contains 6.02210^23 atoms. In this case you have 3.4010^22 atoms: The atomic mass of helium He will give you the weight of one mole of this molecule: 1 mol = 4.00 gram: So the 3.4010^22 helium atoms weigh colorred0.226 colorred " gram".

## How many grams do 4.6x10^20 atoms of helium weigh? Answer.

Avogadro's number is one of the most important constants used in chemistry. It is the number of particles in a single mole of a material, based on the number of atoms in exactly 12 grams of the isotope carbon-12. Although this number is a constant, it's experimentally determined, so we use an approximate value of 6.022 x 10 23.So, you know how many atoms are in a mole. Helium's first ionization energy is −24.58738793625 eV. This value was derived by experiment. The theoretic value of Helium atom's second ionization energy is −54.417763112 eV. The total ground state energy of the helium atom is −79.00515104240 eV, or −2.9033858313 a.u.. Sep 22, 2009 · Whist reading a book on how nuclear fusion takes place in stars I noted that 4 hydrogen atoms are converted 1 Helium atom with the resulting mass difference being converted into energy via E = mc^2. In their calculation ignoring the mass of the electron they.

Oct 16, 2011 · One gm atom of He means 4.002602 gm of He. i.e. Atomic weight of an element when expressed. in grams is called one gm atom of that substance. Taking another example, when we say that. the atomic weight of Oxygen is 16, it means that the mass of an Oxygen atom is 16 times. the a.m.u. and one gm atom of Oxygen means 16 grams of Oxygen. molecular weight of Helium or mol The molecular formula for Helium is He. The SI base unit for amount of substance is the mole. 1 grams Helium is equal to 0.24983748071879 mole. To request a quote or for more information about Air Products, please fill out the form below, and an Air Products representative will contact you shortly. Jul 21, 2007 · I can't understand how both the atomic weight of one atom of an element and the weight in grams of a mole of that element are the exact same thing. For example helium has an atomic mass of 4.0026. That was obtained by adding the amount of protons and neutrons in a helium atom.

Helium, liquid [He] weighs 160 kg/m³ 9.98847 lb/ft³ [ weight to volume volume to weight price mole to volume and weight density] About this Weight of Helium calculator For instance, calculate how many ounces, pounds, milligrams, grams, kilograms or tonnes of a selected substance in a liter, gallon, fluid ounce, cubic centimeter or. Feb 23, 2017 · The atomic weight of Helium is 4.003. One of the things this means is that a mole of Helium has a mass of 4.003 grams. Notice that Helium gas consists of molecules of Helium that contain one atom of Helium. This is not the case for all elements. The molar mass of Helium is 4.003 grams. Calculate volume of Helium per weight, it weighs 0.00018 g/cm³ 0.0001 oz/in³. Materials, substances and compounds weight to volume conversions. If one mole of carbon atom weighs 12g,what is the mass in grams of 1 atom of carbon.

### What is the mass in grams of one atom He-4? Yahoo Answers.

A An atom is the smallest particle known to exist. B There are only about 100 different kinds of atoms that combine to form all substances. C There are thousands of different kinds of atoms that account for a wide variety of substances. D A large atom can be photographed with the aid of an ordinary microscope. E None of these statements. Simplest model of an atom The ability to weigh atoms came about by an observation from an Italian chemist named Amadeo Avogadro. Avogadro was working with gases nitrogen, hydrogen, oxygen, chlorine and noticed that when temperature and pressure was the same, these gases combined in definite volume ratios. Helium is a commonly used carrier gas for gas chromatography. The age of rocks and minerals that contain uranium and thorium can be estimated by measuring the level of helium with a process known as helium dating. Helium at low temperatures is used in cryogenics, and in certain cryogenics applications. 