Answer: i would say D or the last one.
Explanation: According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction.
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When you add heat to a solid the particles gain energy and start to vibrate faster and faster.
When you add heat to a liquid the particles are given more energy and move faster and faster expanding the liquid.
The third option because the elements mentioned in that selection are in the same group, they must have similar properties.
Explanation:
Mg₃N₂ is the formula of magnesium nitride.
Your answer is 1-3-2-4 , grass sand water rock
