Answer:
The empirical formule is CO
Explanation:
Step 1: Data given
Suppose the mass of a compound is 100 grams
Suppose the compound contains:
42.88 % C = 42.88 grams C
57.12 % O = 57.12 grams O
Molar mass C = 12.01 g/mol
Molar mass O = 16.0 g/mol
Step 2: Calculate moles
Moles = mass / molar mass
Moles C = mass C / molar mass C
Moles C = 42.88 grams / 12.01 g/mol
Moles C = 3.57 moles
Moles O = 57.12 grams / 16.0 g/mol
Moles O = 3.57 moles
Step 3: Calculate the mol ratio
We divide by the smallest amount of moles
C: 3.57 moles / 3.57 moles = 1
O: 3.57 moles / 3.57 moles = 1
The empirical formule is CO
Answer:
Explanation:
So, the formula for the compound should be:

Now we assume that we have 1 mol of substance, so we can make calculations to know the molar mass of element X, as follows:

So we have that 6 moles weight 212.7g, and we can make a rule of three to know the weight of compound X:

As we used 1 mol, we know that the molar mass is 32.06g/mol
So the element has a molar mass of 32.06 g/mol and an oxidation state of +6, with this information, we can assure that the element X is sulfur, so the compound is 
Line 1: straight horizontal line
Line 2: straight line at a slope
Line 3: exponential growth curve
Line 4: the topmost curve (the one that initially increases but then starts levels out)
Answer:
5.625 moles of oxygen, O₂.
Explanation:
The balanced equation for the reaction is given below:
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂.
Finally, we shall determine the number of mole of O₂ required to react with 7.5 moles of aluminum, Al. This can be obtained as illustrated below:
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂.
Therefore, 7.5 moles of Al will react with = (7.5 × 3)/4 = 5.625 moles of O₂.
Thus, 5.625 moles of O₂ is needed for the reaction.
Answer:
heya!!!
Explanation:
In atomic physics, the Rutherford–Bohr model or Bohr model, presented by Niels Bohr and Ernest Rutherford in 1913, is a system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.