The closeness of a measurement to its actual value is a measure of its
a. usefulness.
b. reproducibility.
c. precision.
d. accuracy.

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

Achemical reaction is done in the setup shown , resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?