Answer:
D. Flooding occurs when too much rain falls upstream.
Explanation:
Flooding is not a change in a watershed.
A, B, and C are wrong. They all represent changes in a watershed.
Answeeeeer:
A. cell
Explanation:
Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.
Answer:
Molar mass (M) = mass(m) / number of moles (n)
To find the mass of Al2O3 first calculate it's molar mass
thus
M(Al2O3) = (27×2) + (16 × 3)
= 54 + 48
= 102g/mol
Mass of Al2O3 = molar mass × number of moles
= 102 × 0.513
= 52.326g of Al2O3
Hope this helps
Hello!
* First Step: to know Avogrado's Law
We know that by the Law of Avogrado, for each mole of substance we have 6.02*10²³ atoms, if:
** Second Step: to know the molar mass of the solute
The molar mass of of magnesium = 24.30 g/mol
*** Third step: make the ratio mass / mol with atoms
1 mol we have 6.02*10²³ atoms
1 mole of Mg we have 24.30 g
Then we have:
24.30 g ------------- 6.02*10²³ atoms
x ----------------------- 6.98*10^24 atoms
multiply cross
I Hope this helps, greetings ... DexteR! =)
Answer:
A physical change, such as a state change or dissolving, does not create a new substance, but a chemical change does. ... In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Explanation:
