The question is to find grams of CaH2. The balanced chemical equation is: CaH2 + 2H2O --> Ca(OH)2 + 2H2 This mole ratio must be taken into account. Find the moles of H2 as DrBob showed you, then multiply by 1/2 to get moles of CaH2. Finally convert moles of CaH2 to grams.
The six orbitals on the central atom, As, are sp^3d^2 hybrids. That is the kind of hybridization you have in an octahedral structure, "XY6". Each of the hybrid orbitals on the As atom is forming a sigma bond with the half filled p orbital on an F atom.
HCl is a molecular compound with relatively weak intermolecular attractions. It is a gas at room temperature. NaCl is an ionic solid because of the strong ionic attraction between the Na+ and Cl- ions. The physical properties (state at room temperature, melting and boiling poi...
If you wanted to know what amount of sodium chloride was delivered into another container, you would weigh the vial with the salt in it, then weigh the "empty" container which may have traces of salt stuck in it.
You will find your answer here: (Broken Link Removed)
Here is a quick rundown of the way I think it should be done: If the weight is 4590 N, m = W/g, or m = 4590 N / 9.8 kg/N = 468.4 kg d = 468.4 kg / 0.500 m^3 = 937 kg/m^3 1 m^3 = 1000 dm^3 0.500 m^3 = 500 dm^3 d = 468.4 kg / 500 dm^3 = 0.937 kg/dm^3 It can be shown that a densi...
To continue or add on to DrBob's explanation, hydrogen bonding due to O-H groups is stronger than hydrogen bonding involving N-H groups. That is probably related to the electronegativity differences mentioned by DrBob.Hydrogen bonding is the main intermolecular force in bo...
It depends on what the material is. If you know the density in grams/milliliter, the number of grams for 1 mL is numerically equal to the density.
Start with the Ideal Gas Law PV = nRT or n = PV / RT K = n/P (from Henry's Law) n/P = V/RT (from the Ideal Gas Law) or K = V/RT (by combining the last two equations) (V = liters, R = 0.0821 L.atm/K.mol, T = 298K) Substitute to get the constant, K
As you go down a column (group, family) on the periodic table, the number of electron shells increases "shielding" the nucleus and weakening its attraction on outer (valence) electrons. As you go from left to right on a row (period), the nuclear charge increases but ...