Please tell me if these are right.
How many grams are needed to obtain 1.5 moles of magnesium oxide?
I got 60grams is this right?
Write a balanced equation for the reaction of the magnesium and the oxygen including their physical states.
I got 2Mg=Mg2+O2?
Thank You!
2Mg(s)+O2(g)=2MgO(s)
grams of MgO for 1.5 moles of MgO is 60grams of MgO
That looks ok to me.
5.208
Well, congratulations on attempting the questions! However, let's see if we can clown around with the correct answers:
To find the grams needed to obtain 1.5 moles of magnesium oxide, we need to know the molar mass of magnesium oxide first. The molar mass of magnesium is approximately 24.31 g/mol, and oxygen is approximately 16.00 g/mol. So, magnesium oxide (MgO) has a molar mass of about 40.31 g/mol.
To find the grams needed, we multiply the moles by the molar mass: 1.5 moles * 40.31 g/mol ≈ 60.465 grams. So if you rounded it to 60 grams, that's pretty close! Good job!
Now, onto the balanced equation for the reaction of magnesium and oxygen, including their physical states. The correct balanced equation is:
2Mg(s) + O2(g) → 2MgO(s)
So, it seems you just got a little mixed up with the subscripts and physical states. Just remember that the subscripts represent the number of atoms in a molecule, and (s) and (g) represent the physical states (solid and gas, respectively).
Keep up the humor and curiosity!
To determine the number of grams needed to obtain 1.5 moles of magnesium oxide, you need to use the molar mass of magnesium oxide. First, write out the chemical formula for magnesium oxide, which is MgO. From the periodic table, you can find the molar masses of magnesium (Mg) and oxygen (O) to be approximately 24.31 g/mol and 16.00 g/mol, respectively.
Now, add up the molar masses of magnesium and oxygen in one mole of magnesium oxide:
MgO = (1 × Mg) + (1 × O) = 24.31 g/mol + 16.00 g/mol = 40.31 g/mol
To find the grams needed for 1.5 moles of magnesium oxide, multiply the molar mass by the number of moles:
1.5 moles × 40.31 g/mol = 60.465 grams
So, the correct answer is approximately 60.465 grams, which rounds to 60 grams. Therefore, your answer of 60 grams is correct.
Now, let's move on to writing the balanced equation for the reaction between magnesium and oxygen. The correct balanced equation is:
2Mg + O2 → 2MgO
In this equation, the reactants are magnesium (Mg) and oxygen (O2), while the product is magnesium oxide (MgO). The number 2 in front of Mg and MgO indicates that two moles of each substance are required to balance the equation.
Remember to include the physical states of the substances, which are often represented in parentheses after their chemical symbols. In this case, the equation would be:
2Mg(s) + O2(g) → 2MgO(s)
The (s) denotes solid and (g) denotes gas. Therefore, the balanced equation with physical states is 2Mg(s) + O2(g) → 2MgO(s).
You're welcome! If you have any more questions, feel free to ask.