What does the ozone do for us? As in us humans?

What is the density of an apple

The number of valence electrons in an atom that has an atomic number of 13 is

Which scenario would result in a positive population growth? Use this formula: population growth = (birth rate + immigration) - (death rate + emigration) A) 30 individuals emigrate, 30 individuals die, 30 individuals are born, 0 individuals

How do you do ionic equations

The periodic table is an organized arrangement of the elements with each element specifically placed in position. All of the following are true except (My answer: B) Correct? metals tend to form cations and nonmetals tend to form anions.

How many grams are in 2.30 x 10^24 atoms in silver

Why must model sometimes be changed

Identify the properties of magma that causes it to be forced upward towards earth surfaces

An atom has a mass number of 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.

To determine the molar mass of a protein, a 0.891 g sample of it is added to 5.00 g of water and the osmotic pressure is measured as 0.179 atm at 22.0°C, what is the molar mas of the protein? (The protein is non-ionizing)