Which of the following is an example of a mixture?

A.

the atmosphere

B. water

C.

calcium

D.

carbon dioxide

Carol placed a lid over a pot of boiling water. After five minutes, she removed the lid and noticed water drops had formed all over the lid's inner surface. Which statement describes the change in the water vapor molecules as they changed to liquid?

You are performing a chemical reaction in a test tube. The test tube gets colder as the reaction takes place. This chemical reaction is ... O a. a double replacement reaction. O b. endothermic Oc. a single replacement reaction. O d.

The equation for one of the reactions in the process of turning iron ore into the metal is Fe2O3 (s) + 3CO2 (g) → 2Fe (s) + 3CO2 (g) If you start with 3.00 kg of each reactant, what is the maximum mass of iron you can produce?

A water sample contains the pollutant chlorobenzene with a concentration of 15 ppb. What is the molarity of this solution? Assume the density of the solution is 1.00 g/mL. The molar mass of chlorobenzene is 112.6 g/mol.

If the length width and height of a sphere is 3.7 what is the diameter

Cuantos moles de co2 tendremos 54.2 gramos de co2

Which ionic compound is used as a building material? A. salt B. limestone C. magnesium oxide D. iron oxide

What is the twisted ladder shape of the DNA called? 3-D model nucleotides double helix single strand

How many moles of sodium nitrate NaNO3 would be produced from the complete reaction of 253 g sodium chromate Na2CrO4

The equilibrium constant for the production of carbon dioxide from carbon monoxide and oxygen is kc=2*1011 this means that the reaction mixture at equilibrium is likely to consist of