A container holds 3.0 g of hydrogen. if it is evacuated and filled with methane at the same temperature and pressure, what is the mass of methane

How many atoms of hydrogen are there in 3.0kg of ethane

Select the correct answer Which statement is true of a chemical change? 0 A OB It involves changes in the molecular structure. It involves changes in phase but not changes in the molecular structure. It involves dissolving one substance into another.

A gas of 19 mL at a pressure of 740 mmHg can be expected to change its pressure when its volume changes to 30. mL. Express its new pressure in units of atmospheres.

Entropy decreases when select one: a. pressure decreases. b. temperature decreases. c. the system is agitated. d. temperature increases.

Select the true statements about the electron transport chain. In the electron transport chain, a series of reactions moves electrons through carriers. The products of the electron transport chain are and either or.

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller

How do you tell if a compound is polar or non polar

What two ions are central to the arrhenius definitions of acids and bases?