In determining the empirical formula of a compound, you must
convert the mass of each element to moles. Since the given mass for this
problem is 0.212 grams of Magnesium and 0.140 grams of Oxygen, just divide the
mass by the molar mass of Magnesium (24.305 g/mol) and Oxygen (16 g/mol).You’ll
get 0.00872 moles of Magnesium and 0.00875 moles of Oxygen. You then divide the
each mole value with the smallest calculated number of moles which is 0.00872.
You will get an empirical formula of MgO.
Answer:
a) Ka= 7.1 × 10⁻⁴; This is a weak acid because the acid is not completely dissociated in solution.
Explanation:
Step 1: Write the dissociation reaction for nitrous acid
HNO₂(aq) ⇄ H⁺(aq) and NO₂⁻(aq)
Step 2: Calculate the acid dissociation constant
Ka = [H⁺] × [NO₂⁻] / [HNO₂]
Ka = 0.022 × 0.022 / 0.68
Ka = 7.1 × 10⁻⁴
Step 3: Determine the strength of the acid
Since Ka is very small, nitrous acid is a weak acid, not completely dissociated in solution.
<h3><u>Answer;</u></h3>
cadmium
<h3><u>Explanation;</u></h3>
- Cadmium is a transition metal. The transition metals are the elements found in Rows 4 through 7 between Groups 2 and 13 in the periodic table.
- It has an atomic number of 48, and an atomic mass of 112.411 and has 48 electrons which occupies 5 energy levels.
- The element has an electron configuration of 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2. or Kr 4d10 5s2
Answer:
The chloride formed when iron reacts with hydrochloric acid is iron (II) chloride, also known as iron dichloride. The reaction between iron and hydrochloric acid is slower than the reaction with zinc, with much smaller hydrogen bubbles produced.
Answer:
motor nerves
Explanation:
sensory produces while motor transports
