Calcium weighs 40.08 grams per mole. Calcium (20 Ca) has 26 known isotopes, ranging from 35 Ca to 60 Ca. How many moles of calcium atoms do you have if you have 7.92 × 10²¹ atoms of calcium. Compared with a mole of neon, a mole of calcium contains. (b) How many nearest neighbors does each Ca atom possess? Problem 21 Which of the following has more atoms: 1.10 g of hydrogen atoms or $14.7 \mathrm{g}$ of chromium atoms? Trending Questions. 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? Explanation: The Periodic Table tells us that #6.022xx10^23# individual calcium atoms have a mass of #40.1*g# . Calcium nitrate has the molecular formula Ca(NO3)2 and a molecular weight of 164.08 grams per mole. 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. How many atoms of gold does he have? Calcium has atomic mass 40. There are five stable isotopes (40 Ca, 42 Ca, 43 Ca, 44 Ca and 46 Ca), plus one isotope (48 Ca) with such a long half-life that for all practical purposes it can be considered stable. ... A prospector finds 39.39 g of pure gold. We know that 113 mg is 0.113. Join Yahoo Answers and get 100 points today. 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. Homework Statement "Calcium crystallizes in a body-centered cubic structure. How many moles of calcium (Ca) atoms are in $77.4 \mathrm{g}$ of Ca? 0.113 g / 40.08 g/mole = 0.00282 moles of calcium. Each 40.078 grams of calcium has a mole of atoms. A gram mole (Calcium is daitomic) is 80 grams. emilyro emilyro Calcium's atomic mass is 40.08 g/mole, which rounds to 40 g/mole. (c) Estimate the length of the unit cell edge, a, from the atomic radius of calcium … Add your answer and earn points. 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). Join. 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. 2) To find the atoms, multiply 0.00282 moles x 6.022x10^23 atoms/mole = 1.70 x 10 ^21 atoms of calcium. We also know that 1 mole = 6.022 x 10^23 atoms. Determine the volume of … Still have questions? (The mass of one mole of calcium is 40.08 g.) with the right amount of sig figs. Trending Questions. The atomic number of calcium is 20. 1.204 x 10²³ atoms of Au. Ask Question + 100. Get your answers by asking now. Avogadro number . 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