1. Na + MgF2 → NaF + Mg Na= Na=
Mg= Mg=
F= F=
Type of reaction:

2. Mg + HCl → MgCl2 + H2
Mg= Mg=
H= H=
Cl= Cl=
Type of reaction:

3. Cl2 + KI → KCl + I2
Cl= Cl=
K= K=
I= I=
Type of reaction:

4. NaCl → Na + Cl2
Na= Na=
Cl= Cl=
Type of reaction:

5. Na + O2 → Na2O
Na= Na=
O= O=
Type of reaction:

6. Na + HCl → H2 + NaCl
Na= Na=
H= H=
Cl= Cl=
Type of reaction:

7. K + Cl2 → KCl
K= K=
Cl= Cl=
Type of reaction:

8. C2H6 + O2 → CO2 + H2O
C= C=
H= H=
O= O=
Type of reaction:

9. Na2S + HCl → NaCl + H2S
Na= Na=
S= S=
H= H=
Cl= Cl=
Type of reaction:

10. Ca + O2 → CaO
Ca= Ca=
O= O=
Type of reaction:

Suppose water is leaking from a tank through a circular hole of area ah at its bottom. when water leaks through a hole, friction and contraction of the stream near the hole reduce the volume of water leaving the tank per second to cah 2gh , where c (0 < c < 1) is an empirical constant. a tank in the form of a right-circular cone standing on end, vertex down, is leaking water through a circular hole in its bottom. (assume the removed apex of the cone is of negligible height and volume.) (a) suppose the tank is 20 feet high and has radius 8 feet and the circular hole has radius 2 inches. the differential equation governing the height h in feet of water leaking from a tank after t seconds is dh dt = − 5 6h3/2 . if the height of the water is initially 8 feet, how long will it take the tank to empty? (round your answer to two decimal places.)