A for number 1 and C for number 2 im sorry i dont know the rest. :3
A) 2H₂(g) + O₂(g) → 2H₂O(l) + 285.83 kJ
Exothermic
B) 2Mg + O₂ → 2MgO + 1200kJ
Exothermic
2.52 answer=c. That is the pH.
Answer:
mass of hydrogen in lake = 11.19% of 12
= 1.3428
check if question is correct or not
Explanation:
Answer:
no, not all objects emit electromagnet waves.
Explanation: because lets say the object is carpet it has no magnetic waves in it so not all objects do.