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natali 33 [55]
3 years ago
6

At STP, what physical property of aluminum always remains the same from sample to sample?

Chemistry
1 answer:
KIM [24]3 years ago
4 0
At STP, the <span>physical property of aluminum that always remains the same from sample to sample is density. The standard temperature is actually 273 degree kelvin and the standard pressure is 1 atmospheric pressure. I hope that this is the answer that has actually come to your desired help.</span>
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How many grams of Cu will be produced if 15. 8 grams of Cu2S got consumed?
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Answer:

15

Explanation:

Because the ratio of copper in the solution is 15

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What is the name of the ionic compound wwith the formula k(2)s?
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In which chemical reaction will be heat content of the reactance be more that of the products
Anuta_ua [19.1K]
A reaction in which energy is absorbed from the surroundings is called anendothermic<span> reaction. In </span>endothermic<span> reactions the enthalpy of the products is greater than the enthalpy of the reactants. Because reactions release or absorb energy, they affect the temperature of their surroundings.

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3 0
3 years ago
What is the mole ratio of hydrogen to nitrogen in the following reaction: N2(g) + 3H2(g) →
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Answer:

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Explanation:

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5 0
2 years ago
Expressed in the correct number of significant figures the sum of 0.53 cm + 75.321 cm + 28.1 cm =
Nadya [2.5K]

Answer:

\boxed{\text{104.0 cm}}

Explanation:

When adding or subtracting values, you must round your answer to the same "place" as the measurement with its last significant figure furthest to the left.  

That is, you round off to the same number of decimal places as the measurement with the fewest decimal places.

\begin{array}{r|l}0.5& \text{3 cm}\\+ 75.3& \text{21 cm}\\+ 28.1 & \quad\text{cm} \\= 103.9 &\text{51 cm}\\\end{array}

The measurement of 28.1 cm has one digit after the decimal point, so you round the sum to have only one digit to the right of the decimal.

However, the number to be dropped (51) is greater than 5 with only zeros or nothing following the 5.

You must round up the answer. You increase the last significant digit by one.

\text{The sum is $\boxed{\textbf{104.0 cm}}$}

5 0
3 years ago
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