Answer:
squeezing syringes contain gas
Answer: if you have this app then you’r not smart
Explanation: because cheating is not allowed
Answer:
The main characteristics of glass are transparency, heat resistance, pressure and breakage resistance and chemical resistance.
Explanation:
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The answer is D: A metal is added to an acid and hydrogen gas is formed, because that's a chemical reaction
These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical reactivity. The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).