Select the equations that are correctly balanced.

a. H2O + 2O2 → H2O2

b. Fe2O3 + 3H2 → 2Fe + 3H2O

c. Al + 3Br2 → AlBr3

d. CaCO3 → CaO + CO2

What is when a organism reproduces with another organism

Determine the theoretical yield of H2S (in moles) if 32 molAl2S3 and 32 molH2O are reacted according to the following balanced reaction. A possibly useful molar mass is Al2S3 = 150.17 g/mol. Al2S3 (s) + 6 H2O (l) → 2 Al (OH) 3 (s) + 3 H2S (g)

At standard temperature and pressure (0 ∘C∘C and 1.00 atmatm), 1.00 molmol of an ideal gas occupies a volume of 22.4 LL. What volume would the same amount of gas occupy at the same pressure and 35 ∘C∘C?

Where do scientists think the abundance of water on Earth came from?

Which statement best describes the general relationship between stream velocity and the size of the sediment particles transported by the stream? 1. As the stream velocity decreases, the diameter of the sediments transported increases. 2.

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

What moves in or out of a substance during a change of state?