Which elements make up most organic compounds?

A.

Carbon and Hydrogen (also Oxygen, Nitrogen, Phospohorus, and Sulfur)

B.

Helium, Neon, and Argon

C.

Carbon and Krypton

What is a particle that cannot be cut

What did the geologist likely observe in the environment to draw this conclusion? Check all that apply. The geologist saw large rocks and gravel the geologist saw a few plant species

What can you conclude based on your experiment

What is the correct stoicheometric ratio b/w NaN3 and KNO3 to ensure no sodium is unreacted? What would be the consequences of an excess of KNO3 to the operation of an airbag?

Explain the difference between a mineral resource and a mineral reserve

Does skin have a nucleus true or false

Bacteria are only found in decaying matter. A. True B. False

Which is considered a chemical mutagen? tanning beds tobacco X-rays precious metals

Combining 0.380 mol Fe2O3 with excess carbon produced 13.7 g Fe Fe2O3 + 3C → 2Fe + 3CO What is the actual yield of iron in moles? What is the theoretical yield of iron in moles? What is the percent yield?

When a hydrogen electron makes a transition from n=3 to n=1?