Answer:
I think you need to dissolve 62.116 (or 62.12g) of Li2SO4
.
Answer: Option (A) is the correct answer.
Explanation:
A catalyst is a substance which helps in increasing the rate of a reaction without itself getting consumed in the reaction.
A catalyst lowers the activation energy of a reaction so that reactant molecules with less energy can easily participate into the chemical reaction and thus, product formation becomes faster.
Thus, we can conclude that adding a catalyst to the reaction would reduce the activation energy of a chemical reaction.
Answer:
=933.3 grams
Explanation:
Magnesium reacts with oxygen producing magnesium oxide according to the following equation.
2Mg₍s₎ + O₂₍g₎→ 2MgO₍s₎
From the above equation, 2 moles of Magnesium produces 2 moles of magnesium oxide. Therefore the ratio of magnesium to magnesium oxide produced is 1:1
1 mole of magnesium oxide has a mass of: 24+16 =40 grams
560 grams of magnesium=560/24 moles
=70/3 moles.
Since the ratio is 1:1 the reaction produces 70/3 moles of magnesium oxide.
70/3 moles of MgO= 70/3 moles× 40 grams
=933.3 grams
Answer:
This is because oxygen requires two electrons to gain stability, while hydrogen has only one olectron, therefore two hydrogen atoms are required
The question is incomplete, the complete question is;
The 3d energy level in hydrogen has how many distinct states with different values of the quantum number m?
A. 3
B. 5
C. 6
D. 2
E. 4
Answer:
B. 5
Explanation:
The magnetic quantum number is used in describing the actual orientation of orbitals in space. The name 'magnetic quantum number' was coined because it describes the effect of different orientations of orbitals which was initially observed in the presence of an external magnetic field.
The d orbital can exhibit five orientations corresponding to five values of the magnetic quantum number, these are; -2,-1,0,1,2 hence the answer above.