Is a tree burning a chemical or physical change

Write the balance radox reaction by half equation when permanganate (vii) ion produces iodine molecule (iv) manganese (iv) oxide in a acidic medium

What was the difference between Darwin and Lamarck? A. Darwin was able to explain evolution with evidence, something Lamarck did not do. B. The idea of mutation was understood by both but, Darwin could not prove it. C.

The hottest layer of the atmosphere

Which statement about the noble gases is most reliable?

What is the purpose of adding nahso3 at the end of the oxidation? write a balanced equation for the reaction it undergoes?

Which indicator will be the same color in hydrochloric acid as it is in pure water? 1. methyl orange 2. phenolphthalein 3. bromcresol green

Based on your knowledge of energy resources conservation, which of the following statements is true? a) Manufacturers can increase a light bulb's energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb

Ammonia (nh3 (g), hf = - 46.19 kj/mol) reacts with hydrogen chloride (hcl (g), hf = - 92.30 kj/mol) to form ammonium chloride (nh4cl (s), hf = - 314.4 kj/mol) according to this equation:

How does an electromagnet create a magnetic field

Magnetism, reactivity, and fluorescence are three special properties used to identify minerals. true or false