An angstrom = 1 X 10^-10 meters
1.0 mm = 0.001 meters
so,
1.9 * 1 X 10^-10 = 1.9 X 10^-10 meter per chromium
so
0.001 meters ( 1 meter/1.9 X 10^-10)
= 5263158 atoms of chromium
------------------------------------------
( 5.3 X 10^6 atoms )
One Angstrom is defined as 10-10 centimeters. Therefore, the number of any units with a diameter of 2.2 Angstroms that would be required to span 1.0 cm is 1.0/10 -10 or 4.5 X 109 calcium atoms., to the justifiable number of significant digits.
2(2+3)=10 atoms 4 chromium atoms and 6 oxygen atoms
Chromium(III) nitrate is not made of molecules. It is ionic. There are 4 ions in one formula of chromium(III) nitrate.
A lot! 147.4 kg Cr (1000g/1kg )(1mol Cr/52.00g )(6.022 X 10^23/1mol Cr ) = 1.707 X 10^ 27 atoms of Chromium
A mole of any substance has 6.022 x 1023 particles(atoms, molecules or ions) of that substance. So 5 moles of chromium would have 6.022 x 1023 x 5 atoms = 30.11 x 1023 atoms.
One Angstrom is defined as 10-10 centimeters. Therefore, the number of any units with a diameter of 2.2 Angstroms that would be required to span 1.0 cm is 1.0/10 -10 or 4.5 X 109 calcium atoms., to the justifiable number of significant digits.
2(2+3)=10 atoms 4 chromium atoms and 6 oxygen atoms
Chromium(III) nitrate is not made of molecules. It is ionic. There are 4 ions in one formula of chromium(III) nitrate.
1.8x10*24
1 mole = 6.022e23 atoms 8.25 mole = 4.96815 e 24 atoms
Quite a few! 147.6 kg chromium (1000 grams/1 kg)(1 mole Cr/52.00 grams)(6.022 X 1023/1 mole Cr) = 1.709 X 1027 atoms of chromium =========================
Take the actual sample weight of 13grams, and divide it by the atomic weight of chromium. This gives you your molar percentage of atoms. Now multiply this molar percentage by Avogadro's constant, the number of atoms in one mole, and this will give you your number of atoms in the sample.
A lot! 147.4 kg Cr (1000g/1kg )(1mol Cr/52.00g )(6.022 X 10^23/1mol Cr ) = 1.707 X 10^ 27 atoms of Chromium
11 atoms, 2 oatssium, 2 chromium, 7 oxygen. No molecules as such. 2 K+ and the polyatomic anion Cr2O72-.
There are 24 protons in Chromium (including Chromium54) of any isotope. Isotopes are just elements with different numbers of neutrons. If it is called chromium it has 24 protons. The atomic number of an element is the same as the number of protons.
1,000,000,000 atoms lined up side by side will equal 1 meter * * * * * I disagree. The diameter of a copper atom is approx 250 picometres = 2.5*10-10 metres. You would therefore require 4 billion atoms.
1,000,000,000 atoms lined up side by side will equal 1 meter * * * * * I disagree. The diameter of a copper atom is approx 250 picometres = 2.5*10-10 metres. You would therefore require 4 billion atoms.