What geological process(es) could form magnesium silicate perovskite at 500 C?

Zinc + lead(ii) nitrate yield zinc nitrate + leadwhat's the chemical equation for this?

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

How do you lengthen a pattern piece? (family and consumer science, sewing)