chemistry
There is no "correct" value of a probability but some estimates are better than others. The "standard deviation" is probably better than the average deviation as a measure of uncertainty.
9th Chemistry
I think you mean big spaces IN the 2nd and 3rd periods. There are no elements in columns #3 to #12 because there is no "2d" subshell of electrons. Also because the energy of the 3d subshsell is higher than that of the "4s" subshell. The first row of element...
AP Chemistry
The Chemical reaction is: Mg + 2HCl --> MgCl2 + H2 1) Divide the grams of Mg by the atomic mass of Mg to get moles of Mg. 2) Moles of HCl = (2)(moles of Mg) 3) Moles of HCl = (V)(5.0 mol/L) or Volume of HCl = (mol. HCl) / (5.0 mol/L) --------- NOTE: The volume of HCl will b...
AP Chemistry
Complete and balance the reactions below: a) HClO4 + KOH --> b) CsOH + HNO3 --> c) Ca(OH)2 + HI -->
chemistry
Yes, metals are deposited at the cathode.
chemistry
In #2, the two F- ions are "donating" electron pairs to the Be atom in forming covalent bonds with Be. That makes F- a Lewis base and the Be atom a Lewis acid. In #1 there is a transfer of electrons from Ca to S in forming two ions. No covalent bonds are formed. Is t...
Chemistry
CH3 is not a molecule. It is a functional group in a molecule. It could also be an unstable anion or cation. The Lewis structure depends on what that CH3 represents.
Organic Chemistry
The sand bath is not a primary source of heat. It must be heated by a flame or a hot plate. Does that give you any ideas on how to adjust its temperature and the reaction rate?
chemistry, science
Calcium Carbonate, CaCO3, which can form from Ca^+2 and CO3^-2 ions. Bicarbonate ions, HCO3^-, change to CO3^-2 ions in sea-water since sea-water is basic.
Chemistry
The chemical equation is: 2Na(s) + 2H2O --> 2NaOH + H2 Divide the grams of Na by the atomic mass of Na to get the moles of Na. The number of moles of NaOH are equal to the number of moles of Na.
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