A balloon is a sphere with a radius of 5.0 m. the force of the air against the wall of loan is 45 N. what is the air pressure inside the balloon? (Surface area = 12.56 x radius 2, 1 Pa = N/m^2)

Which of the following statements correctly describe nitrogen and its role as a plant nutrient? -Nitrogen is a macronutrient in plants. -Nitrogen-fixing bacteria in the soil convert N2 to NH3.

How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?

What distinguishes a substance from a mixture? Mixtures can be separated physically, while compounds cannot. Samples of the same substance can have different intensive properties. Substances are compounds, and mixtures are not.

What is added to white sugar to create brown sugar?

Which has more volume a kilogram of gold or a kilogram of aluminum?

Determine the number of moles of Krypton contained in a 3.25 liter gas tank at 5.80 atm and 25.5 °C.

In the reaction 2co (g) + o2 (g) â 2co2 (g), what is the ratio of moles of oxygen used to moles of co2 produced? select one:

A log's mass is 5 kg. After burning, the mass of the ash is 1 kg. Explain what may have happened to the other 4 kg of mass.

Are the people on this subway moving? The best answer to this question would be Yes or No

How many molecules are in 237g (about a cup of water)