A phase change is when matter changes to from one state ( solid, liquid, gas, plasma) to another.
V= d/t
v=speed
d=distance
t=time
So v= 422/3
v =140.667m/s
Answer:
0.49 mol
Explanation:
Step 1: Write the balanced equation
Mg + 2 HCI ⇒ MgCl₂ + H₂
Step 2: Calculate the moles corresponding to 12 g of Mg
The molar mass of Mg is 24.31 g/mol.

Step 3: Calculate the moles of H₂ produced by 0.49 moles of Mg
The molar ratio of Mg to H₂ is 1:1. The moles of H₂ produced are 1/1 × 0.49 mol = 0.49 mol.
If I heat a reaction then the rate will increase because the higher the temperature the faster the reaction.
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Answer:
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Explanation: