The density of a rock is 3.93 g/ml. if the rock is added to 3.42 ml of water, the level of the water rises to 5.29 ml. what is the mass of the rock?

1) European leaders of England and France were slow to stop the advances of Hitler and Mussolini because A) they believed Hitler was harmless. B) the League of Nations prevented them acting against Hitler and Mussolini.

Calcium reacts with sulfur forming calcium sulfide. what is the theoretical yield (g) of cas (s) that could be prepared from 1.6 g of ca (s) and 4.25 g of sulfur (s) ? enter your answer with two decimal places. do not type units with your answer.

Familiar solutions can have a wide range of pH levels. According to the chart, which is the strongest acid, based on its pH level? Lemon juice has approximately how many more times the H + ions than tomato juice?

What does charles law state

Which of the following items represents a chemical change? burning melting evaporation freezing The physical properties of a compound are similar to those of its elements. a. True b. False

Which of the following would be a result of increased solar activity? A. Longer winters B. Warmer-than-normal sea surface temperatures C. Colder-than-normal sea surface temperatures D. Shorter summers

The electron configuration of an element is 1s22s22p63s23p64s1. why is this a representative element?

Why is scientific notation important in chemistry?

During translation, the new polypeptides are often directed to specific parts of the cell by the presence or absence of short sequences of amino acids called signal sequences.

Is potassium iodide an electrolyte or nonelectrolyte?