Answer:
Precipitation
Explanation:
There are four main stages in the water cycle. They are evaporation, condensation, precipitation and collection. Let's look at each of these stages. Evaporation: This is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas).
In order to find out how many protons a sodium atom has, you have to look at the periodic table. Sodium is Na on the periodic table and you look for the number on the top of the symbol and you can see that it has 11 protons. To find out how many neutrons, you have to subtract 11 from the mass number, which is 23. 23-11 = 12.
12 neutrons; 11 protons
Answer:
Dipole moment of H₂O: 2.26 Debye
Bond angle in H₂S: 89.7°
Explanation:
The total dipole moment(μr) for H₂O can be calculated by the sum of the dipole moments of each bond of O-H. Because the dipole moment is a vector, the sum of these vectors can be calculated by the cosine law.
μr² = (μO-H)² + (μO-H)² + 2*(μO-H)*(μO-H)*cos(104.5°)
μr² = 1.85² + 1.85² + 2*1.85*1.85*cos(104.5°)
μr² = 3.4225 + 3.4225 + 6.845*(-0.2504)
μr² = 5.13115
μr = √5.13115
μr = 2.26 Debye.
For H₂S:
0.95² = 0.67² + 0.67² + 2*0.67*0.67*cosθ
0.9025 = 0.4489 + 0.4489 + 0.8978cosθ
0.8978cosθ = 0.0047
cosθ = 0.00523
θ = arcos0.00523
θ = 89.7°
n = m/M = 15/102.894 = 0.1457811 moles
c = n/V = n / 0.25 = 0.58312438 moles/dm3
A plant cell, it shows a vacuole
