Join. Join Yahoo Answers and get 100 points today. 0.113 g / 40.08 g/mole = 0.00282 moles of calcium. Calcium nitrate has the molecular formula Ca(NO3)2 and a molecular weight of 164.08 grams per mole. Trending Questions. 2) To find the atoms, multiply 0.00282 moles x 6.022x10^23 atoms/mole = 1.70 x 10 ^21 atoms of calcium. If I have 1405 mg of Fe₂O₃, how many moles of iron do I have? Trending Questions. 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). Explanation: The Periodic Table tells us that #6.022xx10^23# individual calcium atoms have a mass of #40.1*g# . 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. Determine the volume of … Ask Question + 100. Still have questions? Each 40.078 grams of calcium has a mole of atoms. 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. How many atoms are there in total in a molecule of Calcium carbonate, - 5091164 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. an equal number of atoms. Calcium weighs 40.08 grams per mole. Compared with a mole of neon, a mole of calcium contains. 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. How many moles of calcium (Ca) atoms are in $77.4 \mathrm{g}$ of Ca? A calcium atom has 20 protons, 20 electrons and 20 neutrons. The compound calcium nitrate consists of a total of nine atoms, including one atom of calcium, two of nitrogen and six of oxygen. 0 0. A gram mole (Calcium is daitomic) is 80 grams. emilyro emilyro 6.022 X 10²³. 1) Find your moles. Get your answers by asking now. Calcium (20 Ca) has 26 known isotopes, ranging from 35 Ca to 60 Ca. 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. How many atoms of gold does he have? We also know that 1 mole = 6.022 x 10^23 atoms. Homework Statement "Calcium crystallizes in a body-centered cubic structure. (c) Estimate the length of the unit cell edge, a, from the atomic radius of calcium … Calcium's atomic mass is 40.08 g/mole, which rounds to 40 g/mole. ... A prospector finds 39.39 g of pure gold. How many moles of calcium atoms do you have if you have 7.92 × 10²¹ atoms of calcium. Add your answer and earn points. (a) How many Ca atoms are contained in each unit cell? Avogadro number . 1.204 x 10²³ atoms of Au. 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