What is any condition in an experiment that can be changed

How many mols of silver nitrate should be used to create 0.250 L of a 0.500 M solution? If you have 0.55 mols of NaCl and need to make a solution that is 0.0100 M, what volume of solution will you need?

7. What is the role of H3PO4 in aspirin synthesis?

A new element is discovered that is very unstable and highly reactive, and it likes to lose its one valence electron. in what period should this element be placed in? explain.

A pan containing 40 grams of water was allowed to cool from a temperature of 91.0C. If the amount of heat repressed is 1,300 joules what is the approximate final temperature of the water. 74 C 78C 81 C 83C

3. Use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 L at STP. Grams of butane you used "X" grams of butane mL of butane corrected to STP = 22,400 mL

Acids A) are generally proton donors B) produce H + ions in solution C) are electron pair acceptors D) may include all of these characteristics

3.011 x 10^23 atoms F in grams

What would you use if you needed to determine the density of an object? balance and graduated cylinder balance and scale scale and spectroscope

What are two forms of friction that oppose the motion of a moving car

How are models related to theories and hypotheses