26. For each of the following balanced equations, calculate how many grams of each product would be pro- duced by complete reaction of 15.0 g of the reactant
indicated in boldface.
a. 2BC13(s) + 3H2(3) → 2B(s) + 6HCl(3)
b. 2Cu2S(s) + 302(g) → 2Cu2O(s) + 2802(g)
c. 2Cu2O(s) + Cu2S(s) + 6Cu(s) + SO2(8)
d. CaCO3(s) + SiO2() → CaSiO3(s) + CO2(3)

Find the mass in grams of 1.37x1020 particles of h3po4

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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?