You're legally obligated to yield the right-of-way:

A. To pedestrians only if they're in the crosswalk

B. Whenever it's necessary to avoid a collision

C. Whenever you want to occupy the same space as another car

An atorn has 9 electrons and 9 protons at the start. If it loses 2 electrons, the net charge on the atom will be. If the atom instead gains 4 electrons, the net charge will be

2) which statement describes ionic bonding? A) a lattice of ions in a sea of electrons. B) electrostatic attraction between oppositely charged ions. C) the sharing of electrons between atoms to gain a noble gas configuration.

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

Which element is a solid at STP? A. H2 B. I2 C. N2 D. O2

How many milliliters of water at 23 °C with a density of 1.00 g/mL must be mixed with 180 mL (about 6 oz) of coffee at 95 °C so that the resulting combination will have a temperature of 60 °C?

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?