<span>For the answer to the question above,
If 3g of element combines with 8g of D to form CD it means
1 mole of C = 3g
1 mole of D = 8g
hence it forms CD.
So to form CD2 you need 16g of element D
I hope my answer helped you</span>
Answer:
we will all die bc plants make oxygen and and if we dont have oxygen then we die
Explanation:
There is only 1 negative choice here, so you can solve by common sense.
C. They reproduce slower than unicellular organisms.
This is true because, for example, think of humans. We take 9 months to reproduce uses multiple stages of meiosis. Unicellular organisms on the other hand, such as bacteria, are asexual and use binary fission to reproduce, which happens very quickly, but creates less diversity.
<span>Since we're going to need to calculate molar masses, let's start with looking up the atomic weights of the associated elements.
Atomic weight carbon = 12.0107
Atomic weight nitrogen = 14.0067
Atomic weight hydrogen = 1.00794
Atomic weight oxygen = 15.999
Molar mass H2O = 2 * 1.00794 + 15.999 = 18.01488 g/mol
Molar mass N2 = 2 * 14.0067 = 28.0134 g/mol
Now calculate the number of moles of H2O and N2 we have
Moles H2O = 6.63 g / 18.01488 g/mol = 0.368029096 moles
Moles N2 = 1.46 g / 28.0134 g/mol = 0.052117915 moles
Since there's 2 hydrogen atoms per H2O molecule, we have
2 * 0.368029096 mol = 0.736058192 moles
of hydrogen.
The mass of that hydrogen is
0.736058192 mol * 1.00794 g/mol = 0.741902494 g
Since there's 2 nitrogen atoms per N2 molecule, we have
2 * 0.052117915 mol = 0.10423583 moles
We already know the mass of nitrogen we have.
Now we need to determine the mass of carbon we have and the number of moles of carbon.
Subtract the know mass of hydrogen and nitrogen from the total mass of Aniline. So
9.71 g - 0.741902494 g - 1.46 g = 7.508097506 g
Moles carbon = 7.508097506 g / 12.0107 g/mol = 0.625117396 mol
We now have the ratio of carbon : hydrogen : nitrogen of
0.625117396 : 0.736058192 : 0.10423583
We need to get a ratio of small integers that closely approximates the above ratio. Start by dividing all the numbers by the smallest of the numbers. Giving:
5.997145089 : 7.061470053 : 1
All three of those values are acceptably close to integers with the ratio of
6:7:1
So the empirical formula of Aniline is C6H7N</span>
