A sample that contains only FeCO3 and BaCO3 weighs 0.8380 g. When it is dissolved in excess acid, 0.2500 g of carbon dioxide is liberated. What percentage of FeCO3 did the sample contain

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

There are main groups in the modern periodic table of elements

What does the cell nucleus do or, how does it function?