Question 13 (Mandatory) (1 point) What is the balanced chemical equation for the single displacement reaction of solid
sodium in an aqueous solution of calcium nitrate?
6
a) 2Nais) + Ca(NO3)2(04)
> 2NaNO3(aq) + Ca(s)
b) Nais) + CaNO3
3104)
9
->NaNO3108)
+ Ca(s)
c) 2Na (9) + Ca(NO2)2ag)
2NaNO2/08) + Cais)
12
d) 6Na(9) + Ca 3.2(aq)
>2Na zNeg) + 3 Cams)
15
e) The reaction does not occur.
8

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?