Answer:
4 × 10⁶ sec
Explanation:
The distance between the earth and the moon = 384,400 km
The speed of the peregrine falcon = 350 km/hr
Considering,
Distance = Speed × Time
So,
Time = Distance / Speed = 384,400 km / 350 km/hr = 1098.28571 hrs
Also,
1 hr = 3600 sec
So,
1098.28571 hrs = 3600 × 1098.28571 s ≅ 4 × 10⁶ sec
<u>Thus time taken by peregrine falcon if falcon fly to the moon = 4 × 10⁶ sec </u>
Answer:
(1) atomic numbers
Explanation:
The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.
- Atomic number is the number of protons in an atom.
- The periodic law states that "the properties of elements are a periodic function of their atomic number".
- Elements on the periodic table are arranged based on the atomic numbers they contain.
- The number of positively charged particles in an atom is the atomic number.
The element you are looking for is Scandium, the 4th element in the third group.
Since there is no sample, let us assume 100 g of the solution:
(22.2% of 100 g) / (46.0254 g HCOOH/mol) = 0.48234 mol HCOOH
(100 g - 22.2 g) = 77.8 g = 0.0778 kg water
(0.48234 mol HCOOH) / (0.0778 kg) = 6.1997 mol/kg = 6.20 m HCOOH
(77.8 g H2O) / (18.01532 g H2O/mol) = 4.3185 mol H2O
(0.48234 mol HCOOH) / (0.48234 mol + 4.3185 mol) = 0.100 [the mole fraction of HCOOH]
