Which principle explains why it is necessary to have safety belts in cars?

What is the formula mass of silver

What gives the atoms of an element their chemical properties?

A student hears in chemistry class that a certain object is made of a pure substance. What can the student conclude about the object based on this information?

Which statement is true concerning energy

When acetylene, C2H2, a fuel used in welding, is burned in air, two molecules of acetylene combine with five oxygen molecules to form four CO2 molecules and two H2O molecules. Select the statement below that is incorrect in regard to this reaction.

What happens when elements chemically combine? A.) All elements retain their original properties B.) New properties are former C.) Only metals retain their original properties D.) New elements are formed

Which element consists of positive ions immersed in a "sea" of mobile electronsa) sulfur b. nitrogen c. calcium d. chlorine?

1.87e3 m + 24 m + 5.43e-1 km + 1.561e2 km = km

Which 2 continents have the most obvious fit of the coastlines. subject science

A substance with a ph of 6 is called