Find the density of an 8 gram rock if the water in a graduated cylinder rises from 25.0 mL to 29.0 mL when the rock is placed in to the graduated cylinder.

Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar

Predict the products butane (c4h10) + oxygen —>

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.