Answer:
Yes B is correct because when the bees pollinated a plant, it's helping that plant to reproduce.
Answer:
E = 3.825×10⁻¹⁹ J
Explanation:
Wavelength of photon = 5.2 ×10⁻⁷m
Energy of photon = ?
Solution:
Formula:
E = hc/λ
h = plancks constant = 6.63×10⁻³⁴ Js
c = speed of wave = 3×10⁸ m/s
by putting values,
E = 6.63×10⁻³⁴ Js ×3×10⁸ m/s / 5.2 ×10⁻⁷m
E = 19.89×10⁻²⁶ J.m / 5.2 ×10⁻⁷m
E = 3.825×10⁻¹⁹ J
<span>Mass of Na2CO3, then add 10 (molecular mass of water which is 18g)
So we have 106g+180g = 286g if we are looking for the percentage of water in the compound we do this 180g/286g= 62.9
</span><span> SO2 because sulfurs atomic mass is 32g and Oxygen atomic mass is 16g</span>
