Get your answers by asking now. Avogadro number . Explanation: The Periodic Table tells us that #6.022xx10^23# individual calcium atoms have a mass of #40.1*g# . Definition: 1 gram atom of any element means mass of 1 mole of atoms of the element 1mol of Ca atoms has mass = 40.0g 1 gram atom of Ca has mass = 40.0g 5gram atoms of Ca has mass = 5 * 40.0 = 200.0g. Each 40.078 grams of calcium has a mole of atoms. 2) To find the atoms, multiply 0.00282 moles x 6.022x10^23 atoms/mole = 1.70 x 10 ^21 atoms of calcium. Join. The compound calcium nitrate consists of a total of nine atoms, including one atom of calcium, two of nitrogen and six of oxygen. 1) Find your moles. Calcium's atomic mass is 40.08 g/mole, which rounds to 40 g/mole. Join Yahoo Answers and get 100 points today. an equal number of atoms. Determine the volume of … Homework Statement "Calcium crystallizes in a body-centered cubic structure. (b) How many nearest neighbors does each Ca atom possess? How many moles of calcium (Ca) atoms are in $77.4 \mathrm{g}$ of Ca? 6.022 X 10²³. emilyro emilyro 0.113 g / 40.08 g/mole = 0.00282 moles of calcium. Add your answer and earn points. Still have questions? We know that 113 mg is 0.113. ... A prospector finds 39.39 g of pure gold. Calcium weighs 40.08 grams per mole. 0 0. How many moles of calcium atoms do you have if you have 7.92 × 10²¹ atoms of calcium. Find an answer to your question how many atoms are in 115 grams of calcium kieara4life kieara4life 09/12/2016 Mathematics High School How many atoms are in 115 grams of calcium See answer kieara4life is waiting for your help. The most abundant isotope, 40 Ca, as well as the rare 46 Ca, are theoretically unstable on energetic grounds, but their decay has not been observed. Trending Questions. Problem 21 Which of the following has more atoms: 1.10 g of hydrogen atoms or $14.7 \mathrm{g}$ of chromium atoms? (The mass of one mole of calcium is 40.08 g.) with the right amount of sig figs. A calcium atom has 20 protons, 20 electrons and 20 neutrons. How many atoms of gold does he have? A gram mole (Calcium is daitomic) is 80 grams. Trending Questions. The atomic number of calcium is 20. Calcium (20 Ca) has 26 known isotopes, ranging from 35 Ca to 60 Ca. How many atoms are there in total in a molecule of Calcium carbonate, - 5091164 We also know that 1 mole = 6.022 x 10^23 atoms. If I have 1405 mg of Fe₂O₃, how many moles of iron do I have? (a) How many Ca atoms are contained in each unit cell? 1.204 x 10²³ atoms of Au. Calcium nitrate has the molecular formula Ca(NO3)2 and a molecular weight of 164.08 grams per mole. Calcium has atomic mass 40. has a mass of 80 grams (atomic mass) you can find how many atoms have a mass of 15 grams (I hope you know how to do it). Compared with a mole of neon, a mole of calcium contains. Ask Question + 100. 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