mol of Na2CO3 = 2.36 x 10⁻⁴
<h3>Further explanation</h3>
Given
Mass : 0.025 g of Na2CO3
Required
moles
Solution
The mole is the number of particles contained in a substance
1 mol = 6.02.10²³
Moles can also be determined from the amount of substance mass and its molar mass :
mol = mass : molar mass
mass = mol x molar mass
Input the value :
mol = mass : MW Na2CO3
mol = 0.025 g : 106 g/mol
mol = 2.36 x 10⁻⁴
S because As is not a non-metal
Answer:
The solar system speed and Milky Way speed should be switched
Explanation:
Since, E = hf, the transition that releases the highest frequency light will have the greater energy difference.
Blue light has a higher frequency than red light so the transition from X to Y has the greater energy difference.
