Answer:
+and+
Explanation:
positive is helps to the right and wrong way
Answer:
negative
Explanation:
Exothermic reaction - energy is out of system, so energy of system becomes smaller, and ΔH<0.
Answer:
Radioactive dating
Explanation:
Radioactive dating measures the ratio of C¹²(normal) and C¹⁴ (radioactive) in fossils to determine the exact age of the specimen. C¹⁴ is unstable and has a half life of 5730 years, so as the organism ages the amount of C¹⁴ diminishes but the amount of C¹² remains constant. The ratio of C¹⁴ to C¹² is used to analyze the decay of atomic particles to determine exact age.
iron is called Fe amd oxygen is called O
Answer:
R.F.M of Iron (II) oxide :
Moles :
Molecules :
