The universe began about 14 billion years ago. Or 13.7 billion
Answer: A. it is unclear whether or not warming of the planet is occurring
Explanation:
Explanation: This is because the reactants of the chemical reaction<span>(the chemicals that are mixed together are the reacting chemicals or reactants) are at its high in concentration at the start of the </span>reaction<span>. These reactants are constantly </span>being <span>used to make products.</span>
Answer:
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Explanation:
