Imagine that a chemist is trying to establish whether a piece of rock is from a meteorite that fell from outer space. the rock contains more copper-65 atoms than copper - 63 atoms. what can you conclude

Which three things are related according to Newton's second law? a. force, mass, and acceleration b. force, matter, and acceleration c. force, motion, and acceleration d. force, weight, and acceleration

The following forces act on an object: 3N left, 2N up, 1N right, 2N down. What is the total force on the object? Give the size and direction.

An aqueous solution of methyl alcohol (molar mass = 32.05 g/mol) is prepared by dissolving 15.0 mL of the alcohol (d = 0.792 g/mL) in 75.0 mL of water (1.00 g/mL). a. Calculate the mass % of the aqueous alcohol solution. b.

A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water. Determine the mole fraction of sucrose if the final volume of the solution is 508 mL.

You r wrong it is what he said that is write

Which statements describe advantages of models? Check all that apply. Models make it possible to easily notice patterns. Models can be used to communicate and test design ideas. Models allow scientists to predict relationships.

Are energy levels and orbitals the same thing?

Heating devices can be made by passing an electric current through a conductor of: high resistance low resistance high conductivity low conductivity

What is the element 3O2 name

Why sulphur used for food preservation?