How many moles of water are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas?

Question 4 When pure water and sodium chloride combine, what do they create? A. Another pure substance B. A mixture C. A chemical change D. Not enough information is given.

Balance the following half-reaction: (acidic) NO-3 (aq) → NO2 (aq) Express your answer as a half-reaction. Identify all of the phases in your answer.

Which group of elements has a stable number of electrons in their outer energy level? a. noble gases c. halogens b. alkali metals d. alkaline earth metals?

2H2O2 → 2H2O + O2 synthesis decomposition combustion

Which organism is made up of a prokaryotic cell? A.) Flea B.) Amoeba C.) Sunflower D.) Bacterium

Which metal is more active than tin, but less active than zinc

Why does the amount of energy available change as you move from one trophic level to the next?

What type of bond holds metal atoms together?

Imagine you are purifying a protein which accounts for 0.001% of the total protein within a cell. how many steps of purification are required to yield pure protein, assuming a 10 fold purification with each step of purification?

If an object has the mass of 109.67 g and a volume of 16.99 cm3 what's its density