1.5*9.8*1.2
since the formula is force * distance.
1.2 is the distance. the force is gravity on the object (1.5*9.8)
The answer is 17.64 J . (18 J with sig figs)
Answer:
Explanation:
N₂ + 3H₂⟶ 2NH₃
n/mol: 10
The molar ratio is 2 mol NH₃:3 mol H₂.

Answer:
CuNO3
Explanation:
In order to calculate the empirical formula in this question;
Cu = 50.61% = 50.61g
N = 11.16% = 11.16g
O = 38.23% = 38.23g
Next, we convert each gram unit to moles by dividing by their respective molar mass (Where; Cu = 63.55, N = 14, O = 16)
Cu = 50.61 ÷ 63.55 = 0.796mol
N = 11.16 ÷ 14 = 0.797mol
O = 38.23 ÷ 16 = 2.389mol
Next, we divide each mole value by the smallest (0.796)
Cu = 0.796mol ÷ 0.796 = 1
N = 0.797mol ÷ 0.796 = 1.001
O = 2.389mol ÷ 0.796 = 3.001
Approximately, the simple whole number ratio between Cu, N and O is 1:1:3, hence, the empirical formula is CuNO3.
Answer:
will be the speed in 
Explanation:
This is a unit conversion problem.
To solve it, we need the equivalences between km and ft, ft and mi and hr and s.
The equivalences are :

If
then

The trick is to multiply by one the speed given until to convert it in mi/s units

Notice that km,ft,hr and min have been cancelled.
Be careful of the fraction order.
Multiply by ft/km is different that multiply by km/ft