Hydrogen fluoride gas (hf) and sodium hydroxide (naoh) react in a test tube. they form water and sodium fluoride (naf). which type of reaction occurred in the test tube?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies. molten iron has a density of 7.0g/cm cubed. in its solid state, iron has a density of 8.0g/cm cubed.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.