Because flame provides a source of heat so that the magnesium metal atoms can overcome their activation energy. Activation energy is the minimum energy required in order for a chemical reaction to proceed. When the magnesium metal burns it reacts with oxygen found in the air to form Magnesium Oxide.
Answer:
<h2>0.52 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
volume = final volume of water - initial volume of water
volume = 35 - 8 = 27 mL
We have

We have the final answer as
<h3>0.52 g/mL</h3>
Hope this helps you
Out of the options, the best indicator is a color change since it is the only one that can't really be blamed on a physical change. you will eventually notice that during qualitative labs and some quantitative labs, usually the thing that you are looking for is either color change or the production of a precipitate to indicate the presence of a chemical reaction
The answer is A. because as you can see it pulls the force
Answer:
To find the average atomic mass, you take a certain number of atoms, find the total mass of each isotope, and then divide the total mass of all the atoms by the total number of atoms. Assume that you have, say, 10 000 atoms of carbon
Explanation: