Identify the type of chemical reaction: Ex. ZnCl2(aq) + Mg(s) → Zn(s) + MgCl2(aq) -> Single replacement

2KOH(aq) + CuSO4(aq) → Cu(OH)2(s) + K2SO4(aq) -> ?
2Al(s) + 3Br2(l) → 2AlBr3(s) -> ?
4PBr3(l) → P4(s) + 6Br2(l) -> ?
2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) -> ?

What semimetal can form four single covalent bonds.

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer