Which of these are made up of matter? Check all that apply.

parts of outer space where there is no air or atoms

salt dissolved in water

air in the lower levels of the Earth's atmosphere

leather made from cow hides

metal after if has been molded

How many moles of iodine are produced from 560 g of magnesium iodide?

Why is a solution that is 0.10M HCN and 0.10M LiCN considered a good buffer system?

A sample of ethanol has a mass of 45.6 grams. How many molecules are in the sample?

Review the table detailing the mass of Jupiter's moons and their distance from the planet. Which of Jupiter's moons has the greatest gravitational force with Jupiter? Io Europa Ganymede Callisto

Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. a 2.475 g sample of one such additive containing only lead, carbon, and hydrogen was burned in an oxygen rich environment.

The burning of wood in a fireplace generates heat and light in the form of flames. Which of the following terms best describes this type of reaction? a. condensation reaction b. exergonic reaction c. endergonic reaction d.

How are the number of protons and the number of neutrons related?

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches