A students has a sample of rock that has a mass of 25 grams and when placed in water has displaced the water about 10 ml. What is the density of the rock?

219 grams of iron (iii) oxide reacts with excess carbon according to the reaction equation shown below. fe2o3 + c → fe + co2 after a scientist performs the chemical reaction they find the actual yield of iron to be 57.4 grams. calculate the percent yield of this chemical reaction.

When a septic tank backs up a goes in to clean it out

Compare and contrast refraction of light and sound will give brainliest