M(Li) = 75,500 g - 74,000 g.
m(Li) = 1,500 g.
m(<span>lithium nitride) = 76,513 g - 74,000 g.
m</span>(lithium nitride) = 2,513 g.
m(N) = 2,513 g - 1,500 g.
m(N) = 1,013 g.
n(Li) = m(Li) ÷ M(Li).
n(Li) = 1,500 g ÷ 6,94 g/mol.
n(Li) = 0,216 mol.
n(N) = 1,013 g ÷ 14,01 g/mol.
n(N) = 0,072 mol.
n(Li) : n(N) = 0,216 mol : 0,072 mol.
n(Li) : n(N) = = 3 : 1.
<span>The empirical formula of lithium nitride is Li</span>₃N.
First we look at the chemical reaction:
2 Na + Cl₂ → 2 NaCl
Now we should see which is the limiting reagent, so we construct the following reasoning:
if 2 moles of Na reacts with 1 mole of Cl₂
then 2.4 moles of Na reacts with X moles of Cl₂
X = (2.4 × 1) / 2 = 1.2 mole of Cl₂ (way lower that the available quantity of chlorine).
So the limiting reagent is sodium, and from here we can calculate the number of moles of NaCl produced.
if 2 moles of Na produces 2 moles of NaCl
then 2.4 moles of Na produces Y moles of NaCl
Y = (2.4 × 2) / 2 = 2.4 moles fo NaCl (sodium chloride)
I metal nail is not a insulator its a conductor. For example say you put a metal pan with a metal handle on the stove, the handle would slightly get hot to therefor it conducted the heat from the stove. <span />
Answer:
The answer is below
Explanation:
Avogadro stated that "Equal volumes of all gases at the same temperature and pressure contain the same number of molecules". Hence at standard temperature and pressure 1 mole of a gas occupies 22.4 liters of volume.
1 mol = 22.4 liters
Given a gas with 1 L and mass of 1.92 g at STP.
number of moles = 1 L / (22.4 L / mol) = 0.0446 mol
The molar mass = mass of gas / number of moles
molar mass = 1.92 g / 0.0446 mol
molar mass = 43.008 g / mol
Answer:
a. neutral
b. salts
c. salt
Explanation:
Organic salts are a dense number of ionic compounds with innumerable characteristics. They are previously derived from an organic compound, which has undergone a transformation that allows it to be a carrier of a charge, and that in addition, its chemical identity depends on the associated ion.
Organic salts are usually stronger acids or bases than inorganic salts. This is because, for example, in the amine salts, it has a positive charge due to its bond with an additional hydrogen: A + -H. Then, in contact with a base, donate the proton to be a neutral compound again
RA + H + B => RA + HB
H belongs to A, but it is written as it is involved in the neutralization reaction.
On the other hand, RA + can be a large molecule, unable to form solids with a crystalline network stable enough with the hydroxyl anion or oxyhydrile OH–.
When this is so, salt RA + OH– behaves as a strong base; even as basic as NaOH or KOH
