if an atom has 4 protons, 5 neutrons, and 4 electrons, what is the mass number of this atom? How do you know?

This drawing shows the internal anatomy of a sponge. What does the arrow in the middle represent? the path sperm take to fertilize the egg of a sponge the direction of the sponge's travel through the water the flow of water through the body of a

Imagine that an uncharged pith ball is brought into the electrostatic field of a charged rod. The side of the pith ball closest to the negatively charged end of the rod will

Units accepted according to the international system are called?

N₂0₃ what is the oxidation number

A patient received 825 mL of fluid in one day. What is that volume in liters?

Is Ba (NO3) 2 covalent or ionic

An alcohol contains only C, H, and O. When a 1.50mg sample of the alcohol is burned completely in oxygen, 3.30mg of CO2 and 1.80mg of H20 are formed. What is the empirical formula for the alcohol?

Using the field meter, does the field strength increase or decrease as you move away from the bar magnet?

Complete each of the definitions with the appropriate phrase. Precision means that measurements are close to Accuracy means that measurements are close to Anawer Bank each other an accepted value |individual several

Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.4 mol h2/mol c2h2. (find properties of the reactants/products in appendix of book) a.