Isabella filled a glass with warm water. She measured the temperature, and it was 30�c. She left the glass on a table in a room that was 20�c. A few hours later, she measured the water temperature again, and it was 24�c. Which best explains why the water temperature changed?.

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity