Which of the following is a physical change?

A. magnetzing an iron rod

B. roasting marshmallows on a campfire

c. milk souring

D. an antacid neutralizing stomach acid

6. Fossils are remains of organisms found in sedimentary rock. These remains are found in thousands of rock layers around the world and provide evidence for Earth's long history of changing lifeforms.

Why are groups 1 and 2 referred to as the s-block of the periodic table

How many molecules are there in 36 g of FeF3?

Day and night are cased by what

What use is chlorine-36

A. Write an equation for determining the number of moles of NaOH that are added to the flask based on [NaOH] and volume of NaOH titrant (mL NaOH): B.

Is romano cheese an element, compound, homogeneous mixture, or heterogeneous mixture?

Which of the following is an appropriate food storage method

Why should your disposal of excess magnesium take place in a fume hood? (choose all that apply) Group of answer choices The quench released hydrogen gas, which is flammable and explosive The quench is highly exothermic and might cause the solvent to

For the chemical equation SO2 (g) + NO2 (g) SO3 (g) + NO (g) SO2 (g) the equilibrium constant at a certain temperature is 3.00. At this temperature, calculate the number of moles of NO2 (g) that must be added to 2.30 mol SO2 (g) in order to form 1.