Question

question 6 (1 point)
use the periodic table to calculate the gfw (molar mass) of ca3(po3)2 to 5 significant figures.
do not use scientific notation. to get the (table g/mol), use the values given in the answers or use the periodic table.
ca (_1_mol)(table g/mol) = _2_ g/mol
p (_3_mol)(table g/mol) = _4_ g/mol
o (_5_mol)(table g/mol) = _6_ g/mol
_7_ g/mol
a. 1 b. 2 c. 3 d. 4 e. 5 f. 6 g. 7 h. 8
i. 9 j. 10 k. 120.234 l. 278.18 m. 95.994
n. 61.948 o. 40.078 p. 30.974 q. 15.999

Explanation:

Step1: Calculate mass of Ca

In \(Ca_3(PO_3)_2\), there are 3 moles of Ca. The molar mass of Ca (\(O\)) is \(40.078\space g/mol\). So, \((3\space mol)(40.078\space g/mol)=120.234\space g/mol\) (\(K\)).

Step2: Calculate mass of P

There are 2 moles of P. The molar mass of P (\(P\)) is \(30.974\space g/mol\). So, \((2\space mol)(30.974\space g/mol) = 61.948\space g/mol\) (\(N\)).

Step3: Calculate mass of O

There are \(3\times2 = 6\) moles of O. The molar mass of O (\(Q\)) is \(15.999\space g/mol\). So, \((6\space mol)(15.999\space g/mol)=95.994\space g/mol\) (\(M\)).

Step4: Calculate total molar mass

Add the masses of Ca, P, and O: \(120.234+61.948 + 95.994=278.176\approx278.18\space g/mol\) (\(L\)).

Answer:

1. C
2. K
3. B
4. N
5. F
6. M
7. L