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olga nikolaevna [1]
3 years ago
8

Which of these is a characteristic of science? (5 points) Question 1 options: 1) It cannot be reproduced by any scientist. 2) It

cannot be changed by new knowledge. 3) It is based on empirical evidence. 4) It is guided by a set of values.
Chemistry
1 answer:
Alex17521 [72]3 years ago
4 0

Answer:

3

Explanation:

It is based on empirical evidence

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having a smooth or lubricated surface may help decrease friction.

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What can you do differently for
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I would say, what helps me is really paying attention in class and asking questions, also making sure you study for upcoming test's and quizzes and completely assingments on time

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3 years ago
Use the molar bond enthalpy data in the table to estimate the value of Δ∘rxn
MakcuM [25]

Answer:

ΔH°rxn = - 433.1 KJ/mol

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  • CH4(g) + 4Cl2(g) → CCl4(g) + 4HCl(g)

⇒ ΔH°rxn = 4ΔH°HCl(g) + ΔH°CCl4(g) - 4ΔH°Cl2(g) - ΔH°CH4(g)

∴ ΔH°Cl2(g) = 0 KJ/mol.....pure element in its reference state

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3 years ago
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