Technician A says that a soldering gun must be energized for several minutes before it warms up to the melting point of solder. Technician B says that a soldering torch is heated by burning butane gas. Who is right

Answers

Answer 1

Answer:

Both are right

Explanation:

A constant heat must be supplied for several minutes to soldering gun to overcome the melting point of solder. A butane torch is a type of soldering device powered (energised) by the burning of butane gas to melt and solder common metals

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Answers

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2. acidic soil as OH is alkali
3. nitrates (ammonia is nitrogen and hydrogen)
4. I don't know this one sorry
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Ethyne, commonly known as acetylene, is used as a fuel in cutting torches for welding and metalworking. As the torch operates, the ethyne undergoes combustion, as represented by the following equation. 2 C2H2(g) + 5 O2(g) - -> 4 CO2(g) + 2 H2O(g) Calculate the mass of ethyne required to heat 1.50 kg of water 20.0ºC to 42.9ºC.