How many joules of energy are lost when 50 g of water is cooled from 45 degrees Celsius to 25 degrees Celsius?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l

Which can be observed only in a microscopic view? a) structure of a muscle cell b) shape of a soybean plant c) foam insulation d) x-ray of a knee joint