Answer:
4.09 × 10⁻² g
Solution:
As we know that,
1 mol of Fe₂O₃ is equal to = 159.69 g
So,
2.56 × 10⁻⁴ mol will be equal to = X g
Solving for X,
X = (159.69 g × 2.56 × 10⁻⁴ mol) ÷ 1 mol
X = 0.04088 g
Or,
X = 0.049 g
Or,
X = 4.09 × 10⁻² g
Sodium is a silver-colored metal which is soft enough to cut with a knife. It is an extremely reactive metal, and is always found naturally in ionic compounds, not in its pure metallic form. Pure sodium metal reacts violently (and sometimes explosively) with water, producing sodium hydroxide, hydrogen gas, and heat:
Chlorine is a poisonous, yellow-green gas, with a very sharp odor, a
Chemical change happen cuz these 2 elements will combine to form a new compound which’s NaCl ( table salt )
Answer; the answer is variations
because there ice is melting....... is your answer
Basically, temperature changes the reaction, which means that it would be a chemical change since it changes the formation of bonds and reactions.