Your question seems to be incomplete.
<span>When a chemical reaction occurs and the thermometer in the container records a drop in temperature t</span>he reaction is exothermic because heat was released by the reaction.
<span>B. The reaction is exothermic because heat was released by the reaction. is your answer.
Hoped I helped!</span>
100 m = 0.1 km
9.58 sec = 9.58/3600 = 0.00266 hr
Speed = 0.1/0.00266= 37.6 km/hr
Can you mark it brainliest?
Answer:
2HBr(g) → H₂ (g) + Br₂ (g)
2Al + Fe₂O₃ → 2Fe + Al₂O₃
2C₄H₆ + 11O₂ → 8CO₂ + 6H₂O
Ag + Pb₃(PO₄)₂ → No reaction
K₂CO₃ + Cal₂ → 2KI + CaCO₃
Explanation:
1st reaction:
2HBr(g) → H₂ (g) + Br₂ (g)
HBr produces hydrogen and bromine gas.
Second reaction:
2Al + Fe₂O₃ → 2Fe + Al₂O₃
Aluminium is more reactive than iron that's why it displace the iron from oxide and form aluminium oxide.
3rd reaction:
2C₄H₆ + 11O₂ → 8CO₂ + 6H₂O
Butyne burn in the presence of oxygen and produces carbondioxide and water.
4th reaction:
Ag + Pb₃(PO₄)₂ → No reaction
Because lead is more more reactive than silver that's why silver can not displace the lead to react with (PO₄)₂ .
5th reaction:
K₂CO₃ + Cal₂ → 2KI + CaCO₃
potassium carbonate react with calcium iodide and produces calcium carbonate and potassium iodide.
<span>The answer is C.
Outliers are data points that fall way off the average range of values in a dataset. In this case, the number 13 is way off from the
rest of the values which range between 4
and 7. An outlier may represent an error in an
experiment that involved many
treatments. </span>