Is 2Zn + 2HCI = ZnCL2 + H2 balanced or unbalanced

He approximate molar concentration of several chemicals are given. find the ph of each. use the calculator and round to the nearest tenth, if necessary. oven cleaner: [h+] = 10-13 ph = water: [h+] = 0.0000007 ph = blood: [h+] = 0.

True or False: The endocrine system prepares your body to deal with fear."

Which most likely indicates a chemical change has occurred? a solid substance becoming larger a solid melting and becoming a liquid a green liquid becoming a red liquid a liquid freezing and becoming a solid

In which layer of the atmosphere does the aurora borealis form

Give the full electron configuration for barium

List two non-SI units for volume, and explain how they relate to the cubic centimeter.

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.