Is quartz (SiO2) a substance or mixture?

What is the difference between cellular respiration and photosynthesis

How many moles of oxygen (O) atoms are in a sample of 3.98 x 10^23 atoms?

HCl gas is introduced at one end of the tube, and simultaneously NH3 gas is introduced at the other end. When the two gases diffuse through the cotton plugs down the tube and meet, a white ring appears due to the formation of NH4Cl (s). Why is this?

What type of inter-molecular forces are present in C12H22o11 (AKA sugar)

The electrolyte in automobile lead storage batteries is a 3.75 M sulfuric acid solution that has a density of 1.230 g/mL. Calculate the mass percent, molality, and mol fraction of the sulfuric acid.

Write the name and formula of the compound made of magnesium and fluorine

How was or wasn't the scientific method followed in this experment

1‑propanol (nn ‑propanol) and 2‑propanol (isopropanol) form ideal solutions in all proportions. Calculate the partial pressure and the mole fraction (yy) of the vapor phase of each component in equilibrium with each of the given solutions at 25 °C.

4. suppose you are setting up a reaction that requires an iodide salt and are planning to use sodium iodide. however, at the last minute you find that you are out of sodium iodide, so you must use potassium iodide instead.

The Large Hadron Collider is a particle accelerator that may be able to provide insight into the most fundamental structure of matter. It is 27 km long.