What are some common tools scientists use to measure length and mass?

How many moles of potassium are in 78.20 g

The joule is the si unit of energy and is equal to 1 kg m2 s-2. the erg is another energy unit, equal to 1 g cm2 s-2. use unit conversion methods to work out how many ergs are in 1 joule.

Name the following in aqueous solution: HClO2

According to the bohr model of the atom, the single electron in what motion of a hydrogen atom circles the nucleus

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.

Why are Van der Waals forces important? A) They determine how strong dipole moments will be in polar covalent molecules B) They are the strongest type of intermolecular force that can act on polar and non-polar molecules C) They are primary

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?