Answer:
5.35
Explanation:
Value 5.00 6.00 7.00
Weight 75.0% 15.0% 10.0 %
We can determine the weighted average of these values using the following expression.
Weighted average = ∑ wi × xi
where,
w: relative weight
x: value
Weighted average = 5.00 × 0.750 + 6.00 × 0.150 + 7.00 × 0.100
Weighted average = 5.35
Yes, they interfere with each other
Exothermic
Explanation:
A chemical reaction that has ΔH of -2764Kj indicates that the reaction that took place was an exothermic reaction.
- The enthalpy changes accompanying a reaction causes heat changes.
- In an exothermic reaction, heat is usually liberated to the surroundings.
- The environment becomes hotter at the end of the reaction.
- It is assigned a negative value because the sum of the heat contents of products is less than that of reactants.
- A positive sign is for an endothermic reaction.
learn more:
Exothermic reactions brainly.com/question/10567109
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