A helium balloon contains 0.54 g of helium. given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

If 500 ml of air contains 2 x 10^22 particles (Atoms and molecules), how many particles do you inhale in one day if you breath 15000 L of air? a. 2 x 10^22 b. 6 x 10^26 c. 1.2 x 10^27 d. 5 x 10^24

How many grams of aluminum will be produced if 21.3g of Ba react with 19.7g of Al2 (SO4) 3

4.50 g of NaCl reacts with 10.00 g of AgNO3 to produce 7.93 g of AgCl. If the theoretical amount of AgCl that can be formed is 8.43 g, what is the percent yield?

Combustion reaction of ammonia

The ductility of a material is the measure of a) The amount of elastic deformation that can be sustained before yielding b) The capacity of a material to absorb energy when it is deformed elastically c) The degree of plastic deformation that has

Which is an example of the flow of heat through conduction? Hot air rises to the top of the room A hot-air balloon rises into the sky Heat flows from a hot liquid to a pot handle Heat causes winds to blow from the water to the land

Jin listed some common thermal insulators and conductors in a chart. A 2-column table with 2 rows. The first column labeled Insulators has entries rubber, air. The second column labeled Conductors has entries copper, X.

A major component of gasoline is octane. When liquid octane is burned in air it reacts with oxygen gas to produce carbon dioxide gas and water vapor. Calculate the moles of carbon dioxide produced by the reaction of of oxygen.

Which of the following statements about transition metals is true? a. They are never found uncombined in nature. b. They include familiar metals such as gold, silver, copper, and nickel. c.

Elements can be separated from one another. Question 6 options: True False