Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. what type of matter is it?
a. solution
b. element
c. mixture
d. compound
e. colloid

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

How many atoms are there in 5.70 mol of mg

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?