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Triss [41]
3 years ago
6

A student completed a lab report. Which correctly describes the difference between the “Question” and “Hypothesis” sections of h

er report?
“Question” states what she is asking, and “Hypothesis” states the result of her experiment.
“Question” states what she is asking, and “Hypothesis” states what she thinks the answer to that question is in “if . . . then . . . because” format. “Question” describes what she is trying to find out, and "Hypothesis" states the procedures and methods of data collection.
“Question” describes what she is trying to find out, and “Hypothesis” states any additional information or prior knowledge about the question
Chemistry
2 answers:
valkas [14]3 years ago
6 0

Answer:

b

Explanation:

b

ValentinkaMS [17]3 years ago
4 0

The answer is:

“Question” states what she is asking, and “Hypothesis” states what she thinks the answer to that question is in “if . . . then . . . because” format.

I hope you find my answer helpful.

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vladimir1956 [14]

Answer:

Solar eclipse

Explanation

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3 years ago
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Which statement about AHf is true?
Pachacha [2.7K]

Answer:

  • <u><em>It is positive when the bonds of the product store more energy than those of the reactants.</em></u>

Explanation:

The <em>standard enthalpy of formation</em>, <em>ΔHf</em>, is defined as the energy required to form 1 mole of a substance from its contituent elements under standard conditions of pressure and temperature.

Then, per defintion, when the elements are already at their standard states, there is not energy involved to form them from that very state; this is, the standard enthalpy of formation of the elements in their standard states is zero.

It is not zero for the compounds in its standard state, because energy should be released or absorbed to form the compounds from their consituent elements. Thus, the first choice is false.

When the bonds of the products store more energy than the those of the reactants, the difference is:

  • ΔHf =  ΔHf products - ΔHf reactants > 0, meaning that ΔHf is positive. Hence, the second statement is true.

Third is false because forming the compounds may require to use (absorb) or release (produce) energy, which means that ΔHf could be positive or negative.

Fourth statement is false, because the standard state of many elements is not liquid. For example, it is required to supply energy to iron to make it liquid. Thus, the enthalpy of formation of iron in liquid state is not zero.

3 0
3 years ago
Which components of the atom have a positive charge?
Sveta_85 [38]

Answer:

protons have a positive, neutrons have no charge and electrons have a negative chage

Explanation:

4 0
3 years ago
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5.5x10² – 6.50x10'<br> Express the calculation in correct significant digits
OLga [1]

Answer:

6.15x10^2

Explanation:

Hello!

In this case, when performing mathematical operations with numbers in scientific notation, the first step is to write them in standard notation:

550 - 65.0

Thus, the result without any significant figures-based analysis is:

615.0

However, since 550 is significant to the ones and 65.0 to the tenths, we need to round the result to the bigger significance, in this case to the ones; therefore the appropriate result would be:

615

That in scientific notation would be:

6.15x10^2

Best regards!

5 0
3 years ago
Can some one answer my questions plz
seropon [69]

Answer:

what is your question?

Explanation:

what do you need?

5 0
2 years ago
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