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1 year ago

If the formula mass of one molecule is X amu, the molar mass is X g/mol. Group of answer choices True False

Chemistry

1 answer:

Irina-Kira [14]1 year ago

8 0

yes

Explanation:

the molar mass of a compound is g/mol

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HELP ME PLEASEEE

rusak2 [61]

Answer:

68.2%

Explanation:

3 0

2 years ago

A sample of octane burns releasing 2290 J of heat to the surroundings, and the gases produced expands against a piston to do 560

dexar [7]

<u>Answer:</u> The internal energy change for the reaction is -2850 J

<u>Explanation:</u>

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

<u>Sign convention of work:</u>

Work done for expansion process is taken as negative and work done for compression is taken as positive.

According to the First law of thermodynamics,

$\Delta U=q+w$

where,

$\Delta U$ = internal energy

q = heat absorbed or released = -2290 J

w = work done = -560 J

Putting values in above equation, we get:

$\Delta U=(-2290)+(-560)\\\\\Delta U=-2850J$

Hence, the internal energy change for the reaction is -2850 J

4 0

3 years ago

Question 1

Nastasia [14]

In the given compound, 0.2 mole of C₂H₆O will contain 1.2 moles of hydrogen.

<h3>chemical compound</h3>

In the balanced chemical compound C₂H₆O, we can deduce the following;

1 mole of C₂H₆O contains 6 moles of hydrogen

0.2 mole of C₂H₆O = ?

= 0.2 x 6 moles = 1.2 moles of hydrogen

Thus, in the given compound, 0.2 mole of C₂H₆O will contain 1.2 moles of hydrogen.

Learn more about number of moles here: brainly.com/question/15356425

#SPJ1

5 0

1 year ago

a student measured a volume using a graduated cylinder he read the volume to be 9.01. The teacher read the volume and said the a

tatuchka [14]

Answer:

<h2>The answer is 0.46 %</h2>

Explanation:

The percentage error of a certain measurement can be found by using the formula

$P(\%) = \frac{error}{actual \: \: number} \times 100\% \\$

From the question

actual volume = 8.97 mL

error = 9.01 - 8.97 = 0.04

So we have

$P(\%) = \frac{0.04}{8.97} \times 100 \\ = 0.4459308807...$

We have the final answer as

Hope this helps you

5 0

3 years ago

I) Explain why chlorine(1) oxide has a low melting point.

In-s [12.5K]

Answer:

Being a covalent compound, the intermolecular forces between the Cl2O molecules are weak and easily overcome. Therefore little heat energy, in terms of low boiling point is involved.

6 0

1 year ago