Answer:
C. 4.00 K
Explanation:
We can solve this using Charles's Law of the ideal gas. The law describes that when the pressure is constant, the volume will be directly proportional to the temperature. Note that the temperature here should only use the Kelvin unit. Before compressed, the volume of the gas is 50ml(V1) and the temperature is 20K (T1). After compressed the volume becomes 10ml(V2). The calculation will be:
V1 / T1= V2 / T2
50ml / 20K = 10ml / T2
T2= 10ml/ 50ml * 20K
T2= 4K
Increase across a period (due to increasing nuclear charge with no accompanying increase in shielding effect).Decrease down a group (although nuclear charge increases down a group, shielding effect more than counters its effect).
Yes, It eats meats and is a bottom feeder. !
<h3><u>Answer;</u></h3>
Fe2+(aq) + 2OH(aq) ----> Fe(OH)2(s)
<h3><u>Explanation;</u></h3>
We first write down the balanced equation for this reaction:
FeCl₂(aq) + 2NaOH(aq) → 2 NaCl(aq) + Fe(OH)₂(s)
This is a precipitation reaction, where two soluble salts are mixed together in solution forms to make a precipitate.
Then,we can now write the ionic equation for this reaction, that is:
Fe²⁺(aq) + 2Cl⁻(aq) + 2 Na⁺(aq) + 2OH⁻ (aq) → 2 Na⁺(aq) + 2Cl⁻(aq) + Fe(OH)₂(s)
Now, we need to cancel the spectator ions, which are ions that are present on both sides in the equation.
So, the equation becomes;
Fe2+(aq) + 2OH(aq) ----> Fe(OH)2(s)
