The 3 means there are 3 molecules of H2O (water), and the 2 is a subscript and means there are 2 atoms of hydrogen (H) in one molecule.
There are 6 molecules in the formula 3H2O: 3 molecules of water (H2O) each composed of 3 atoms (2 hydrogen and 1 oxygen).
The formula for calcium nitrate trihydrate is Ca(NO3)2•3H2O, indicating that each formula unit contains one calcium ion (Ca2+), two nitrate ions (NO3-), and three water molecules.
The formula for calcium chloride is CaCl2.2H2O.
I believe the balanced chemical equation isC2H5OH+3O2 ---> 2CO2+3H2O the amount of energy relased from the equation is -1409kJ/molhowever I tried to calculate it out myself with a bond energy table i received from my professor and ended up with the number -1283kJ/mol...close enough
Adding a big 2 in front of a formula typically means squaring the formula. For example, if the original formula was x, then 2x would mean squaring x, which is x^2.
There are 6 molecules in the formula 3H2O: 3 molecules of water (H2O) each composed of 3 atoms (2 hydrogen and 1 oxygen).
The formula for calcium nitrate trihydrate is Ca(NO3)2•3H2O, indicating that each formula unit contains one calcium ion (Ca2+), two nitrate ions (NO3-), and three water molecules.
2NaAlO 2+3h2O
The formula for calcium chloride is CaCl2.2H2O.
The formula for beryllium phosphate trihydrate is Be(H2PO4)2 • 3H2O.
I believe the balanced chemical equation isC2H5OH+3O2 ---> 2CO2+3H2O the amount of energy relased from the equation is -1409kJ/molhowever I tried to calculate it out myself with a bond energy table i received from my professor and ended up with the number -1283kJ/mol...close enough
The formula for copper II nitrate trihydrate is Cu(NO3)2•3H2O. This compound contains one copper atom (Cu), two nitrate ions (NO3), and three water molecules (H2O) in its structure.
3 Hydrogen atoms, 2 Oxygen atoms.
Both DNA and messenger RNA (mRNA) molecules contain nucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U). This sequence of bases carries genetic information and dictates the synthesis of proteins.
For example, if you have the formula C3H6 + 9/2O2 --> 3CO2 + 3H2O, then usually it's a reduced balanced equation to find the (delta)H (standard molar enthalpie) of a molecule, which in this case would be for the C3H6. To find the original balanced equation, just multiply everything by 2 (since the denominator of 9/2 is 2). It should be C3H6 + 9/2O2 --> 3CO2 + 3H2O to 2C3H6 + 9O2 --> 6CO2 + 6H2O. I hope this helps
NaCl has not 2 in the formula unit.
Adding a big 2 in front of a formula typically means squaring the formula. For example, if the original formula was x, then 2x would mean squaring x, which is x^2.