How many joules are released when 250.0 g of water cools from 60.0 degree c go 20.0 degree c?

Amanda pushes a box across the room with a force of 30 n. it accelerates at 5 m/s/s. what is the mass of the box? * 6 kg 1.16 kg 30 kg 5kg

The gram molecular mass or co2 is the same as the gram molecular mass of

C8h18(g) + o2(g) →co2(g)+h2o(g) how many grams of oxygen are required to react with 17.0 grams of octane (c8h18) in the combustion of octane in gasoline?