What is the enthalpy of reaction for the decomposition of calcium carbonate?

Complete this brønsted-lowry reaction placing each product by its appropriate label. hso4- + hcn

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

What type of chemical bond is formed between two atoms of bromine 1. metallic 2. hydrogen 3. ionic 4. covalent