Draw the structure of trans-6-bromo-3-heptene. be sure the stereochemistry is drawn clearly.

The double bond splits the molecule in two parts one contains the Br in a chain of 4-C atoms and the other contains a chain of 3 -C atoms.

Trans means that the Br and the chain of 3-C atoms do not face each other directly.

Find the sketch in the enclosed file.
 

Na₃PO₄ + 3HCl —> 3NaCl + H₃PO₄

The coefficients are: 1, 3, 3, 1

Explanation:

_Na₃PO₄ + __HCl —> __NaCl + _H₃PO₄

The above equation can be balance as follow:

Na₃PO₄ + HCl —> NaCl + H₃PO₄

There are 3 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 3 before NaCl as shown below:

Na₃PO₄ + HCl —> 3NaCl + H₃PO₄

There are 3 atoms of Cl on the right side and 1 atom on the left side. It can be balance by writing 3 before HCl as shown below:

Na₃PO₄ + 3HCl —> 3NaCl + H₃PO₄

Now, the equation is balanced.

The coefficients are: 1, 3, 3, 1