Riley rubs two rocks together. She notices that some of the surface of one of the rocks was worn away to form small particles. What has happened to that rock?

Which of the following elements is most metallic? A. boron B. carbon C. nitrogen D. fluorine E. sodium

How many grams of Cu will be produced when 10 grams of Al reacts with CuCl2 in the following chemical reaction? Al (s) + CuCl2 (aq) → AlCl3 (aq) + Cu (s). Use the Equation Balancer tool to balance the equation and find the mole ratio of Cu:Al.

Hector used 240 Joules of energy to lift (straight up) a TV that weighed 80 Newtons. How high did Hector lift the TV? A. 1/3 meter B. 2 meters C. 3 meters D. 4 meters

How long does it take water to turn into ice in the freezer?

Analysis of an unknown compound reveals that the compound is 27.29% carbon and 72.71% oxygen. The molar mass of the compound is 132.03g/mol. What is the molecular formula of the compound?

G which atomic orbitals overlap to form the carbon-carbon σ bonding molecular orbital of acetylene, c2h2?

Where did the earth hold most of its original water

Giovanni created this chart to study for an exam. A 2-column table titled common ionic compounds. The first column labeled compound has entries sodium hydroxide (N a O H), iron oxide (F e O), calcium chloride (C a C l subscript 2), calcium carbonate

Consider the two electron arrangements for neutral atoms A and B. What is the difference between atom A and atom B? A - 1s22s22p63s1 B - 1s22s22p65s1 Atom B has lost some inner electrons.

Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinning top, or a falling tree.