Geologist invented the geologic time scale to keep track of older rocks that have been layered over by newer rocks due to sedimentation that comes from other areas.
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Answer:
CaCl2 + 2NaOH -> 2NaCl + Ca(OH)2
Explanation:
The most important thing to determine whether a change is physical or chemical is whether the substance was changed. When the substance being changed, it is chemical change. Otherwise, it is physical.
gene therapy
Explanation:
Gene therapy, also called gene transfer therapy, the introduction of a normal gene into an individual's order to repair a mutation that causes a genetic disease.
The formula for chromium iii and sulfate ion is 2+3(1+4)= 2+(3x5)
