An alloy is made up of more than one type of what?

Why do the planets travel in eliptical orbits?

What are three ways to reduce friction

What is the name of upcomming new element?

Who invented plutonium

Which compound is insoluble in water? (1) KOH (3) Na3PO4 (2) NH4Cl (4) PbSO4

A block of wood has a volume of 55 cm3 and a mass of 550 g. What would be its density? Answer in units of g/cm3.

Is the following sentence true or false? A molecular formula shows the arrangement of the atoms in a molecule.

Your task is to measure the amount of energy evolved during the combustion of some hydrocarbon. Which of the following would be the ideal technique for this experiment? a. bomb manometry b. coffee-cup calorimetry c. bomb calorimetry

Which of the following characteristics is not a property of an acid? a. has a sour taste b. accepts an H + ion c. may cause damage to buildings, statues, and rivers d. increases the concentration of hydronium ions in an aqueous solution

Which of these conclusions can be drawn from Rutherford's experiment? A: Each atom contains electrons. B: The nucleus of an atom can be split. C: Each atom contains protons. D: Atoms are mostly empty space.