Answer:
D — All of them
Explanation:
The activation energy in a reaction is the minimum amount of energy required for a chemical reaction to take place. Since all the options are processes in a chemical reaction, D should be the answer.
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What equipment is generally used to make lyophilized medications suitable for administering to the patient
Answer:
NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.
Explanation:
Hello there!
In this case, according to the law of conservation of mass, we need to have the same number of atoms of each element at both sides of the equation; therefore we analyze each reaction:
NaOH + H2CO3 → Na2CO3 + H2O
: three hydrogens at the left and two at the right, so this is not balanced.
N2 + H2 → 2NH3: two hydrogens at the left and six at the right, so this is not balanced.
NH3 + HCl → NH4Cl: this equation is balanced as it has one nitrogen atom, four hydrogen atoms and one chlorine atom at each side of the equation.
AlCl3 + Li → Al + LiCl: three chlorines at the left and one of the right, so this is not balanced.
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