How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2) ?

Holly studied some soil at the bottom of a valley. The soil contained some roc from the top of a nearby mountain. Explain how the particles could become part of the soil.

What mass, in grams, of chlorine gas (Cl2) is contained in a 12.5-liter tank at 27.0 degrees Celsius and 2.85 atmospheres? Show all of the work used to solve this problem.

A sample of oxygen gas has a volume of 36.7 L at 145 kPa and 65. ̊C. What volume will the sample have at STP?

List the following units in order from largest to smallest: m3, mL, cL, uL, L, dL?

Which of the following will most likely increase the amount of erosion that occurs on the banks of a river? A. Heavy rains on the mountain that is the river's water source B. High winds over the ocean to which the river flows C.

What is a scientific explanation for a range of hypotheses and observations supported by testing

A chemical reaction involves the rearrangement of atoms to form new molecules. During a chemical reaction, however, atoms are neither created nor destroyed. Which of the following is true about the atoms involved in a chemical reaction? A.

What is the new concentration, after diluting 300 mL of a 1.5 M LiCl solution to 1L

The answer that he gave was wrong

In which orbital does an electron in a bromine atom experience the smallest?