Which process results in a chemical change?

A) Tearing tin foil

B) melting an iron bar

C) crushing an aluminum can

D) burning magnesium ribbon

A chemist needs to find out how large of a container would be required to contain the products of an ammonia decomposition. If 8.91 mol H2 are produced during the reaction, how many moles of N2 are produced?

A client with tongue occlusion has loss of gag reflex and alterations in level of consciousness. The blood gas test shows oxygen saturation as 40mm Hg and carbon dioxide saturation as 75 mm Hg.

Is potassium borate soluble?

How did thompson know the charge of the particle he discovered was negative?

If scientists knew the latitude of a location on earth's surface but not the longitude what could they determine about the location?

Where did the longest tsunami form?

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .

What fuel is produced by the electrolysis of water? chlorine gas hydrogen gas natural gas oxygen gas

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation