The rate of the forward reaction equals the rate of the backward reaction. A dynamic equilibrium is a chemical equilibrium between a forward reaction and the reverse reaction where the rate of the reactions are equal.
Answer:
there both radio stations
Explanation: there both radio stations
Answer:
Cr2O3
Explanation:
To find the empirical formula, which is the smallest whole number ratio of a compound, the following is done:
68.4% Cr = 68.4g of Chromium
31.6% O = 31.6g of Oxygen
Since, Cr = 52, O = 16, divide each mass by their respective atomic mass to convert to moles.
Cr = 68.4/52 = 1.315 mol
O = 31.6/16 = 1.975 mol
- Next, we divide each mole value by the smallest value (1.315mol)
Cr = 1.315/1.315 = 1
O = 1.975/1.315 = 1.50
The ratio or Cr to O is 1:1.5
We multiply this ratio by 2 to get the whole number ratio as follows:
2 × 1: 2 × 1.5
2:3
Hence, the empirical formula of Cr and oxygen is Cr2O3.
Answer:
The correct answer is 4. gives the relative number of atoms of each element per formula unit.
Explanation:
Empirical formula shows the ratio of elements of which a compound is composed. It is a minimal formula: it does not show the actual number of atoms of each element in the compound, but it shows the relative number of each element in the molecule. For example: butane has the molecular formula C₄H₁₀. It means that it is composed by 4 atoms of C and 10 atoms of hydrogen (actual number of atoms in the molecule). The ratio C:H is 4:10, so the simplest ratio is 2:5 (if we divide by 2). Thus, the empirical formula is C₂H₅ (there are 2 atoms of C for every 5 atoms of H).
To solve this we assume that the gas inside the
balloon is an ideal gas. Then, we can use the ideal gas equation which is
expressed as PV = nRT. At a constant pressure and number of moles of the gas
the ratio T/V is equal to some constant. At another set of condition of
temperature, the constant is still the same. Calculations are as follows:
T1 / V1 = T2 / V2
V2 = T2 x V1 / T1
V2 = 231 x 556 / 278
V2 = 462 cm³