Initial Knowledge Check Question 4
Rank the effective nuclear charge Z' experienced by a valence electron in each of these atoms:
atom
z' experienced by a
valence electron.
An atom of palladium
2.
✓
An atom of molybdenum.
2
An atom of yttrium.
3
An atom of silver.
(pick one)
(pick one)
1 (highest)
?
2
3
4 (lowest)

What stress will shift the following equilibrium system to the left? n2(g) + 3h2(g) ⇌ 2nh3(g) adding more n2(g) adding more nh3(g) increasing the pressure of the system reducing the volume of the container

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth