Suppose you need to build a raft to cross a fast-moving river. describe the physical and chemical properties of the raft that would be important to ensure your safety.

What is the unit for intensity

A graduated cylinder is filled 25.0 mL with water and a piece of granite is placed in the cylinder, displacing the level to 37.2 mL. What is the volume of the granite piece in cubic cm

Is it possible to identify something as an element, compound or pure substance

Find errors in this equation. Ca (s) + water (l) - > C (OH) 2 (aq) + H (6)

The law of conservation of mass tells us, in part, that matter is neither created nor destroyed. How can we see this by using chemical reaction?

A noble gas consists of three isotopes of masses of 19.99 amu, 20.99 amu, and 21.99 amu. the relative abundances of these isotopes are 90.92%, 0.257%, and 8.82% respectively. what is the average atomic mass of this noble gas? what noble gas is this?

Adding iron filings to sand

Which of the following sets of empirícal formula, molar mass, and molecular formula is correct?

Hexane and hexene are hydrocarbon compounds from different homologous series. the combustion of these two compounds produce different amount of soot. explain the difference based on the percentage of carbon by mass.

Reactants → products Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.