What is the molar mass of (NH₄)₃PO₄ in g/mol? A) 149.10 g/mol B) 113.01 g/mol C) 141.03 g/mol D) 61.99 g/mol

Answer: A) 149.10 g/mol

Explanation:

First, I list what I know, which are the molar masses of N, H, P, and O:

N = 14.01 g/mol
H = 1.01 g/mol
P = 30.97 g/mol
O = 15.99 g/mol

Now, I determine how many molecules of N, H, P, and O there are, starting with (NH₄)₃:

With just NH₄, there would be 1 N and 4 H, but since there are () around it with a subscript of 3, we multiply 3 by both N and H₄, so:

1*3 = 3 N
1*12 = 12 H

Now, we look at PO₄:

The subscript of 3 is before PO₄, so we do not apply that to PO₄:

1 P
4 O

Now, we know the molar masses and number of each of the elements, so we can determine the molar mass of the entire compound.

First, I calculate the total molar masses of each of the elements by multiplying the number of molecules of the element by the element's molar mass:

3 N = 3*14.01 g/mol = 42.03 g/mol
12 H = 12*1.01 g/mol = 12.12 g/mol
1 P = 1*30.97 g/mol = 30.97 g/mol
4 O = 4*15.99 g/mol = 63.96 g/mol

Then, I calculate the total molar mass of the compound by adding the total molar masses of each of the elements together:

42.03 + 12.12 + 30.97 + 63.96 = 149.08 g/mol

I probably used slightly different approximations of the molar masses of each element, but my answer is closest to choice A) 149.10 g/mol.

So, if there are no () around a compound, like PO₄, the subscript only applies to the element it's attached to, so there are 4 molecules of O and only 1 molecule of P.

If there are () around a compound with a subscript, like (NH₄)₃, the subscript after the () gets applied to each element inside the ().

I hope this helps! :)

Final answer:

The molar mass of the compound (NH₄)₃PO₄ is calculated by adding up the molar masses of all its constituent elements. The calculated molar mass is approximately 149.09 g/mol, which corresponds to answer choice (A) 149.10 g/mol.

Explanation:

To calculate the molar mass of a compound, you multiply the quantity of each element by its atomic mass and then sum them all up. The formula (NH₄)₃PO₄ contains Nitrogen (N), Hydrogen (H), Phosphorous (P), and Oxygen (O). The atomic masses of these elements are approximately 14.01 g/mol, 1.01 g/mol, 30.97 g/mol, and 16.00 g/mol respectively. So for the compound (NH₄)ᵣPO₄, the molar mass would be as follows:

(3*N) + (12*H) + (1*P) + (4*O) = (3*14.01) + (12*1.01) + 30.97 + (4*16.00) = 149.09 g/mol approximately

Therefore, the closest answer choice to the correct molar mass is (A) 149.10 g/mol.

Learn more about Molar mass here:

brainly.com/question/31327254

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