Is oxygen gas (O2) a compound or an element? Is hydrogen gas (H2) a compound or an element?

If I have 6.02 x 10^23 atoms of silicon, how many grams of silicon do I have?

How is the rate of a chemical reaction related to temperature? A: It is slowed by higher temperature B: It is dependent upon the temperature C: It is Independent of the temperature D: It is unrelated to temperature

What is the modern atomic model sometimes called?

If you mixed three Dixie cups' contents together containing 0.05L of 1.0M lemonade, 0.05L of 2.5M lemonade, and 0.05L of 0.5M lemonade, what would be the molarity of the resulting solution?

Be sure to answer all parts. identify a, b, and c, intermediates in the synthesis of the five-membered ring called an α-methylene-γ-butyrolactone. this heterocyclic ring system is present in some antitumor agents.

How many covalent bonds can each carbon atom form?

Hich element is likely to be the most brittle? a. selenium b. cobalt c. platinum d. zinc

What units should they have used in order to make the correct conversion

The brown solid that formed is zinc copper oxygen iron

a solution is approximately 332.0 g of salt per kilogram of solution. Assume this salt is all NaCl. What is the molality of this solution?