The element was uranium, it was made during World War II ( the first atomic bomb was dropped on Japan, Hiroshima )
For more information, a H-bomb ( Hydrogen bomb ) is more explosive ( the sun is made mostly by Hydrogen ) and North Korea declared that they just have one.
Answer:The process is known as sublimation
Explanation:
Sublimation is a process wherby solid substances are changed into gaseous state
answer 4 th. It is endothermic because heat is gained from the surroundings.
Answer:
A. Acidic
B. Neutral
C. Basic
D. Acidic
E. Basic
Explanation:
The reaction of salts with water to give aqueous solutions which are either acidic, basic or neutral is known as salt hydrolysis. Salts that are produced from the reaction of strong acids and weak bases give acidic solutions. Salts that are produced the reaction between weak acids and strong bases give basic solutions. Neutral solutions are obtained from salts produced bynthe reaction of strong acids and strong bases.
The hydrolysis of the given salts are shown below:
A. AlCl₃ + 3 H₂O ---> 3 HCl + Al(OH)₃
The aqueous solution produced will be acidic since HCl is a strong acid while Al(OH)₃ is a weak base.
B. NaBr + H₂O ----> HBr + NaOH
The aqueous solution produced will be neutral since HBr is a strong acid and NaOH is strong base as well.
C. NaClO + H₂O ----> HClO + NaOH
The aqueous solution produced will be basic since HClO is a weak acid while NaOH is a strong base.
D. CH₃NH₃NO₃ + H₂O ----> HNO₃ + CH₃NH₂ + H₂O
The aqueous solution produced will be acidic since HNO₃ is a strong acid while CH₃NH₂ is a weak base.
E. Na₂SO₃ + 2 H₂O ----> H₂SO₃ + 2 NaOH
The aqueous solution produced will be basic since H₂SO₃ is a weak acid while NaOH is a strong base.
Answer:
44.8 L
Explanation:
One mole of any gas occupies 22.4 L under standard temperature (0°C = 273 K) and standard pressure (1 atm). Under those same conditions, the volume occupied by 2 moles of methane, assuming ideal behavior is:
2 mol × (22.4 L/ 1 mol) = 44.8 L
2 moles of methane under STP occupy a volume of 44.8 L.