How many of the following reactions will form solid precipitates? 1) Cu(NO3)2 + 2HCl (aq) ⟶ CuCl2 (?) + 2HNO3 (?) 2) AgNO3 (aq) + HCl (aq) ⟶ AgCl (?) + HNO3 (?) 3) Fe(OH)3 (s) + 3HCl (aq) ⟶ FeCl3 (?) + 3 H2O (?) 4) Cu(NO3)2 (aq) + 2 NaOH (aq) ⟶ Cu(OH)2 (?) + 2NaNO3 (?) 5) Cu(OH)2 (s) + 4 NH4OH (aq) ⟶ Cu(NH3)4(OH)2 (?) + 4 H2O (?)

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?