In the reaction of magnesium metal with hydrochloric acid, we can determine that the magnesium metal has reacted completely when the magnesium metal is gone.
<em>In the reaction of magnesium metal with hydrochloric acid, how do you determine when the magnesium metal has reacted completely? select all that apply.</em>
- <em>All of the water has evaporated. </em>
- <em>The dilute HCl is gone. </em>
- <em>The magnesium metal is gone. </em>
- <em>Gas bubbles are no longer produced.</em>
Magnesium reacts with hydrochloric acid according to the following equation.
Mg(s) + 2 HCl(aq) ⇒ MgCl₂(aq) + H₂(g)
How can we determine when the magnesium metal has reacted completely?
All of the water has evaporated. NO. Water is not part of the reaction.
The dilute HCl is gone. NO. It indicates that HCl reacted completely.
The magnesium metal is gone. YES. If Mg is gone means it reacted completely.
Gas bubbles are no longer produced. NO. The bubbles, produced by hydrogen, may not be produced due to the insufficiency of HCl.
In the reaction of magnesium metal with hydrochloric acid, we can determine that the magnesium metal has reacted completely when the magnesium metal is gone.
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B. Molecules in both the metal and the surrounding air will start moving at higher speeds.
The Outer space of the colder region has the temperature of 2 Kelvin.
<u>Explanation:</u>
Even the sun is in extreme hot condition or temperature, but the outer space or called as space is extremely cold that is around 2 Kelvin.
In the space there are no objects or nothing to make the heat to travel through, even though the sun's heat travels in space there will be nothing like molecules or atoms are there to transfer or absorb it. So, at the outer regions of colder space the temperature is only 2 Kelvin.
True, oxygen gas ignites a glowing splint