Which rule for assigning oxidation numbers is correct

Hydrogen is usually - 1.

Oxygen is usually - 2.

Apure group 1 element is + 1.

Amonatomic ion is 0.

Starting from rest, a runner at a track meet reaches a speed of 7.5 m/s in 1.7 s. How far does she run during this time, assuming her acceleration is uniform?

Which activity is an example of a chemical change? a. sugar dissolving in water b. water evaporating into water wapor c. lighting a match d. freezing water

How long does it take to walk 0.13 miles

If R1 = 6 Ω, R2 = 8 Ω, R3 = 2 Ω, ε1 = 4 V, and ε2 = 14 V, what is the current in R

What is the sum of the kinetic energies of the alpha particle and the new nucleus?

A gas in a piston is compressed doing - 439 j of work, and its internal energy increases by 318 j. how much heat flows? (be careful with + and -. + w = expansion. + q = added, + u = temp goes up) (unit = j)

A loop of wire is placed in a uniform magnetic field. (a) For what orientation of the loop is the magnetic flux a maximum? The plane of the loop is perpendicular to the magnetic field. The plane of the loop is parallel to the magnetic field.

Dr. Arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode.

Stephen buys a new mop he travels 3 km south and the. 4 km east and then 3km north how far does he need to go to get back. To where he started

The elements with the largest atomic radii are found in the