Which two particles each have a mass approximately equal to one atomic mass unit?

(1) electron and neutron

(2) electron and positron

(3) proton and electron

(4) proton and neutron

Which are base units used in the metric system? Check all that apply. quarts liters grams degrees Fahrenheit degrees Celsius pints

Newton's second law of motion uses the formula which states that a force will cause a mass to accelerate. (f = m • a. rewrite the formula to solve for a.

The three major groups on the periodic table

Which correctly defines a basic solution? a. [H+] is not present. b. [H+] is equal to [OH-]. c. [H+] is less than [OH-]. d. [H+] is greater than [OH-].

how to identify mesomeric effect and inductive effect

Which is the best definition of activation energy? O the energy required to end a chemical reaction O the energy required to bind a substrate to an active site O the energy required to form or break the bonds of reactant molecules O the energy

A chemist wants a 0.100 m solution of naoh. She has 0.0550 mol naoh available. What volume of solution is needed to make the mixture?

Which of the following is the most important factor when determining a safe speed? A) Number of passengers on your boat B) Distance from the nearest safe shoreline C) Presence of a safe water buoy D) Wind, water conditions and currents

Which of the following statements about water is true? It's strongest intermolecular forces are London dispersion forces It's a non-polar molecule It's a solid at room temperature and pressure It's a solid form is less dense than the liquid form

At 25.0 degrees Celsius, one milliliter of mercury has a mass of 13.6g. How many liters of mercury are required to have a mass of 500 Kg of mercury?