Air is made of seperate molecules of Oxygen, Nitrogen, and Carbon Dioxide. Is the air a pure substance or a mixture? Explain.

If log x = - 0.761. What does x equal

Give the empirical formula for C↓8H↓8

How many liters of a 0.225 M solution of KI are needed to contain 0.935 moles of KI?

What could explain the changes in the insect's coloration over time A. The population of the incest increased B. The color of the surroundings changed C. A new color of predator was introuduce D. Females started to prefer darker males

A student conducts an experiment to determine how the amount of water given to a plant affects its growth. What is the independent variable for this experiment?

Explain, in terms of electrons, why the radius of a calcium ion is smaller than the radius of a calcium atom.

The silkworm feeds on what

For the reaction? Fe+? H2o ⇀↽? Fe3o4+? H2, a maximum of how many grams of fe3o4 could be formed from 354 g of fe and 839 g of h2o? Answer in units of g

Quicklime (CaO) is produced by the thermal decomposition of calcium carbonate (CaCO3). Calculate the volume of CO2 at STP produced from the decomposition of 152 g CaCO3 by the reaction. CaCO3 - > CaO + CO2

What is the nearest star in Gemini