How many moles of Helium gas are in a balloon with a volume of 6.452 L at 99.7 kPa

and 297 Kelvin

The elements of which group are nonreactive? halogens alkaline earth metals noble gases alkali metals

Which substance is the reducing agent in this reaction? 2KMnO4+3Na2SO3+H2O→2MnO2+3Na2SO4+2KOH

What type of element is chlorine? metal. alkaline earth metal. halogen. inner transition metal.

What is the charge of the nucleus of every atom?

2 Pc What energy transfer is occurring when you make a call on a phone? A. electrical to chemical B. heat to sound C. electrical to sound O OD. chemical to light Reset Selection

According to Table I, which equation represents a change resulting in the greatest quantity of energy released? 1. 2C (s) + 2H2 (g) - > C2H4 (g) 2. 2C (s) + 3H2 (g) - > C2H6 (g) 3. N2 (g) + 3H2 (g) - >2NH3 (g) 4. N2 (g) + O2 (g) - > 2NO (g)

Calculate the number of liters in 3.25 g of ammonia

Adding drops of food coloring to a beaker of water more organized system?

Some chemical hazards are physical and some are related to the potential health effects of exposure. Click only one box for each response Toxicity Carcinogenic Flames Inhalation hazard Flying objects

Which would be best categorized as heat transfer by convection? A) Wearing a white shirt to stay cool on a summer day.