How many particles can be stored in a 4.0 L container at room temperature (23 C) and standard atmospheric pressure (101.3 kPa)?

2.1 moles
0.47 moles
6.1 moles
0.16 moles

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural. question 2 reflects a moral or social value. question 3 refers to something that can be measured. question 4 reflects a question that can’t be observed.