Based on Reference Table H, which sample has the highest vapor pressure?

a. water at 20ºC

b. water at 80ºC

c. ethanol at 50ºC

d. ethanol at 65ºC

2. Iron reacts with superheated steam to form hydrogen gas and the oxide Fe3O4. Calculate the number of moles of hydrogen produced by 10.0 g of iron and enough steam. 3Fe (s) + 4H2O (g) - --> Fe3O4 (s) + 4H2 (g) a. 0.239 mol H2 b. 239 mol H2 c. 2.

In a soda-acid fire extinguisher, concentrated sulfuric acid reacts with sodium hydrogen carbonate to produce carbon dioxide, sodium sulfate, and water. a. how many moles of sodium hydrogen carbonate would be needed to react with 150.

A positively charged atom is known as a cation. A cation will? ... A) have more protons B) have to same number of protons and electrons. C) Be the same as a neutral atom. D) have more electrons.

Bismuth oxide reacts with carbon to form bismuth metal: bi2o3 (s) + 3c (s) → 2bi (s) + 3co (g) when 689 g of bi2o3 reacts with excess carbon, (a) how many moles of bi form? 2.957 mol bi (b) how many grams of co form? g co

IS Typtophan an element on the periodic table?

People can increase water conservation by eating more food drinking more water taking longer showers reducing water pollution

What is the value of work done on an object when a 70-newton force moves it 9.0 meters in the same direction as the force? A. 7.8 joules B. 6.3 * 102 joules C. - 7.8 joules D. 0 joules

Identify the three essential components of an electrical circuit

Trisha is learning how to do a first-aid procedure known as CPR. She is practicing using a mannequin, or a model of the top half of the human body. What is one limitation of a CPR mannequin? A.

What is meant by the conservation of energy