Potassium (K) is an alkali metal, placed under sodium and over rubidium, and is the first element of period 4. It is one of the most reactive elements in the periodic table.
Answer:
250000 μL
Explanation:
If 1 L = 1000 mL
Then X L = 250 mL
X = (1 × 250) / 1000 = 0.25 L
Now we can calculate the number of microliters (μL) in 0.25 L:
if 1 μL = 10⁻⁶ L
then X μL = 0.25 L
X = (1 × 0.25) / 10⁻⁶ =250000 μL
A. -20kj
Explanation:
The reaction is exothermic
therefore enthalpy = 20 - 40 = -20
The partial pressure of the gas will be the total pressure minus the vapor pressure. 523.8-23.8=500mmHg. This makes sense due to the fact that the idea of partial pressures still works even with vapor pressure since vapor pressure is just the partial pressure of water vapor (23.8mmHg) in the container which is added to the partial pressure of hydrogen gas (500mmHg) to make a total pressure of 523.8mmHg.
I hope this helps. Let me know in the comments if anything is unclear.
Covalent.
Ionic Bond = Two atoms at which one of them are positive, one of them are negative. Whoever is more reactive will steal the electron and keep it, and they will form a bond. Most likely will be a metal ion (+Ve) and a non-metal ion (-ve).
Covalent = Non-metal bond to non-metal. They share electrons.
Although Hydrogen is positively charged, they are "technically" sharing electron, hence is covalent
