Answer:
Mass = 3 g
Explanation:
Given data:
Mass of magnesium = 2.4 g
Mass of oxygen = 2.4 g
Mass of magnesium oxide formed = ?
Solution:
Chemical equation;
2Mg + O₂ → 2MgO
Number of moles of oxygen:
Number of moles = mass / molar mass
Number of moles = 2.4 g/ 32 g/mol
Number of moles = 0.075 mol
Number of moles of magnesium:
Number of moles = mass / molar mass
Number of moles = 2.4 g/ 24 g/mol
Number of moles = 0.1 mol
now we will compare the moles of magnesium oxide with both reactant.
Mg : MgO
2 : 2
0.075 : 0.075
O₂ : MgO
1 : 2
0.1 : 2/1×0.1 = 0.2
Mass of magnesium oxide:
Mass = number of moles × molar mass
Mass = 0.075 mol × 40 g/mol
Mass = 3 g
Answer:
I think its either A or B.
Explanation:
The reason I don't think it can be B or C is because both have too do with thinking. Technology does not control how you think, so those should stay about the same. Technology can help prove theories and hypothesis' to be true, but they could also make more observations due to the technology they didn't have before. I believe the answer is A, but I'm not 100% sure. Good Luck, i helped as best as i thought possible.
I would go with C. SDS and warning signs
your answer would be a. usually liquid or gas at room temperature
What do you mean by this question?
