Researchers have discovered that a moon rock brought back by the apollo astronauts has a mass of 5.671 kg and a volume of 1,698 cm3. what is the density of the rock? remember to use the correct number of significant digits in your answer. 3.3398 g/cm3 3.340 g/cm3 0.2994 g/cm3 3.3398 x 10-3 g/cm3

What type of electromagnetic radiation has a shorter wavelength than blue light

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.