What is true about the particles in a substance?

Boitic factors and abiotic factors in the ecosystem

What mass of ammonium chloride should be added to 2.45 l of a 0.165 m nh3 in order to obtain a buffer with a ph of 9.50?

N2 is the form of nitrogen that animals use.

During a chemical reaction, an iron atom became the ion Fe2+. What happened to the iron atom?

If an atom of hydrogen loses its electron, what is its charge? A. - 1 B. 0 C. + 2 D. + 1 (I know it's not the first two, I'm just confused because hydrogen has one proton and one electron but has a charge of + 1)

Which two properties are characteristic of ionic compounds?

explain why the hydrogen atoms in a hydrogen gas molecule form nonpolar covalent bonds but the oxygen and hydrogen atoms in water molecules form polar covalent bonds

The equation 2 N O 2 in equilibrium with N 2 O 4 represents a system,

How does the calorie compare to the metric unit the joule? How do you calculate a calorie? Is it the same for all types of food?

Under which conditions would the solubility of a gas be greatest? A. high pressure and high temperature B. high pressure and low temperature C. low pressure and high temperature D. low pressure and low temperature