The difference in elements??
Answer:
sorry if this is wrong but B
Explanation:
Answer:
d = 20.89 g/cm³
Explanation:
Given data:
Length of block = 4.20 cm
width of block = 3.80 cm
Height of block = 5.40 cm
Mass of block = 1800 g
Density of block = ?
Solution:
First of all we will calculate the volume.
V = l×w×h
V = 4.20 cm ×3.80 cm× 5.40 cm
v = 86.18 cm³
Density:
d =m/v
d =1800 g/ 86.18 cm³
d = 20.89 g/cm³
Answer:
a. H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
b. NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)
Explanation:
According to Bronsted-Lowry acid-base theory,
- An acid is a substance that donates a H⁺.
- A base is a substance that accepts a H⁺.
a. When dissolved in water, H₂S behaves as an acid according to the following equation.
H₂S(aq) + H₂O(l) ⇄ HS⁻(aq) + H₃O⁺(aq)
b. When dissolved in water, NH₄⁺ behaves as an acid according to the following equation.
NH₄⁺(aq) + H₂O(l) ⇄ NH₃(aq) + H₃O⁺(aq)