The amount of matter in a given space or volume is called what?

Which of these statements is not true about chemical reaction rates

The time in hours it takes a satellite to complete an orbit around the earth varies directly as the radius of the orbit (from the center of the earth) and inversely as the orbital velocity.

A metal object with a mass of 19g is heated to 96c, then transferred to a calorimeter containg 75g of water at 18c. the water and metal object reach a final temperature of 22c. a. what is the specific heat of this metal object?

An angstrom is about the size of an atom and a fermi is about the size of the nucleus of an atom. Given that 1 angstrom unit = 10⁻¹⁰ m and 1 fermi = 10⁻¹⁵ m, what is the relationship between these units?

If a molecule has four hybrid sp3 orbitals, it can be concluded that the molecule has a A. trigonal planar molecular geometry. B. trigonal planar electron domain geometry. C. tetrahedral molecular geometry. D. tetrahedral electron domain geometry.

To lift a car, you use a hydraulic lift filled with a fluid that has density of 1 1200 kg/m3. The radius of one half of the lift is 0.5 meters and the diameter of the other half of the lift is 2.5 meters.

Charlie runs an auto repair and mechanic shop. A hot rod has come in with mass 1500 kg requiring a repair. He needs to raise the car using a hydraulic lift on a piston (Piston A) having a radius of 25 cm.

What does 4_2 helium means

The type of energy transferred by a wave in a medium is energy

With an average acceleration of - 2.4 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 13.2 m/s to a complete stop? Answer in units of s.