Answer:
Concentrated hydrochloric acid
Explanation:
The solution turns from its original pink colour to a dark rich blue.
the answer is 3 because when they are hibernating their heart rate increases while their sleeping
A is the answer im pretty sure
To test for hydrogen, burn a candle near the suspected source of hydrogen. If you hear a squeaky pop sound, hydrogen is present because when hydrogen gas burns, it makes a squeaky pop sound.
That would be cause part of the sodium is pure and that means it still kind of has it properties when it was an element and that its i think.
