The answer is 0,465 moles.
The answer is 6,31 moles Ag.
15.8 moles Cu x 6.02x10^23 atoms/mole = 9.51x10^22 atoms. There are no molecules in the element Cu (copper). Molecules are found when there are two or more atoms bound together, such as in H2 gas or H2O, etc.
1 mole Kr = 6.022 x 1023 atoms 1.7 x 1025 Kr atoms x (1 mole Kr)/(6.022 x 1023 Kr atoms) = 28 moles Kr (rounded to two sig figs)
First you need to find the atomic mass of magnesium, 24.3 grams.Then you can do a simple conversion:Grams ÷ Atomic mass = Moles7.5 grams ÷ 24.3 grams = 0.309 moles Mg
The answer is 88 moles.
The number of molecules in a mole is known as "Avogadro's Number" and is about 6.002 times ten to the twenty-third power. Therefore, the number of moles is 0.543 X 6.022 = 3.27 times ten to the twenty-third power. (This answer will be the same for moles of any substance.) Silicon is generally regarded as having only one atom per molecule, so that the number of atoms will be the same as the number of moles. Under certain conditions, however, silicon may occur as polyatomic molecules, and in such an instance the answer would be different.
The answer is 6,31 moles Ag.
6.45 moles X 6.02 X 10 to the 23 power will be right (use 3 significant figures in your answer)
The answer is 3,587 moles.
15 moles3 moles potassium3 moles nitrogen9 moles oxygen15 X 6.022 X 10 to the 23rd power
5.22 x 10 to the power of 22 iron atoms is equivalent to 0,087 moles.
H2O is water. One mole of water contains 2 moles of hydrogen atoms. Therefore, 10.7 moles of water contain 21.4 moles of hydrogen atom.
2.16 X 1024 atoms lead (1 mole Pb/6.022 X 1023) = 3.59 moles of lead ==============
One mol of copper is 6.02 x1023 atoms. So 3.44 x 1023 would be 0.571 moles.
15.8 moles Cu x 6.02x10^23 atoms/mole = 9.51x10^22 atoms. There are no molecules in the element Cu (copper). Molecules are found when there are two or more atoms bound together, such as in H2 gas or H2O, etc.
each mole has avogadro's number of atoms in it, which is 6.02 x 10 to the 23rd power. so, 4 x 6.02 x 10 23 power of atoms
1 mole Kr = 6.022 x 1023 atoms 1.7 x 1025 Kr atoms x (1 mole Kr)/(6.022 x 1023 Kr atoms) = 28 moles Kr (rounded to two sig figs)