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2 years ago

What is the molar mass of aluminum (Al)

Chemistry

2 answers:

Nookie1986 [14]2 years ago

8 0

Answer:

2.68573957

Explanation:

Papessa [141]2 years ago

6 0

Answer:

26.981539 u

Explanation:

One mole of Al atoms has a mass in grams that is numerically equivalent to the atomic mass of aluminum. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

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Tresset [83]

Is that supposed to be a paragraph

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3 years ago

Indicate the number of significant figures in the measured number 0.0020 A. 4 B. 5 C. 2

Sergio [31]

Answer:

The correct answer option is C. 2.

Explanation:

We are given the number '0.0020' and we are to indicate the number of significant figures in the given measured number.

According to the rules of significant figures, numbers that are non-zero, zeros between any two significant numbers and the ending zeros in the decimal position are categorized as significant figures.

Since there is one non-zero number and one ending zero in the decimal position, therefore 0.0020 has 2 significant figures.

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3 years ago

4. An 82 kg hiker climbs Mt. Humphrey near Flagstaff. During a two hour period, the hiker's

bazaltina [42]

Answer:

$\Delta E = 434253.96\,J$ , $\Delta P = 60.313\,W$

Explanation:

The change in energy is given by the change in gravitational potential energy:

$\Delta E = m\cdot g \cdot \Delta h$

$\Delta E = (82\,kg)\cdot (9.807\,\frac{m}{s^{2}} )\cdot (540\,m)$

$\Delta E = 434253.96\,J$

The average rate of change in terms of time is approximately this:

$\Delta P = \frac{\Delta E}{\Delta t}$

$\Delta P = \frac{434253.96\,J}{(2\,h)\cdot (\frac{3600\,s}{1\,h} )}$

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2 years ago

Is Benzylamine soluble in water?

ziro4ka [17]

Yes, Benzylamine is miscible, meaning it is soluble at all amounts.

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3 years ago

Read 2 more answers

The boiling point of liquid nitrogen is 77 kelvin. It is observed that ice forms at the opening of a container of liquid nitroge

icang [17]

Answer:

The answer is "The First choice".

Explanation:

The whole question can be found in the file attached.

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3 years ago