Additional Exercise 4.32 A 500.0-g piece of iron is heated in a flame and dropped into 400.0 g of water at 10.0 °C. The temperature of the water rises to 90.0 °C. How hot was the iron when it was first removed from the flame?

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na, so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?