100g of calcium carbonate was heated until it decomposed to give calcium oxide and carbon dioxide. 56g of calcium oxide was left. Work out the mass of carbon dioxide given off.

It's laundry day at Dan's house, so he plugs in his electric iron. What transformation of energy takes place inside the iron? The iron converts energy into energy.

Which best describes a mixture?

Briefly explain why the bulk temperature of the water remains low (at room temperature)

Earthquakes occur at faults where tectonic plates meet. What is this statement an example of? A. A conclusion scientists developed by observing patterns B. An opinion policy makers use to influence which states get money for disaster relief C.

How many significant figuers are in the measurement 0.020 km?

A compound that changes color when it comes into contact with an acid or base is an?

1. A food sample is burned in a calorimeter that contains 2000. g of water. The temperature increases from 22.0°C to 44.3 °C. How many Calories does the food sample contain, assuming all of the energy from the food was transferred into the water?

Why doesn't water light on fire? It has all the ingredients except heat! Hydrogen for the flammability factor, oxygen so it can keep burning, and all you need to do is add heat and BOOM you have a flame! 15 pts

The type of social bonds present in modern societies that are based on difference, interdependence, and individual rights is called:

The difference between ionic covalent and metallic bonding