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Elena-2011 [213]
2 years ago
11

2. Does the aluminum sample (the can) contain more than, (less than or exactly one mole of aluminum? Support answer with calcula

tion.
Chemistry
1 answer:
mrs_skeptik [129]2 years ago
6 0

Answer:

than, (less than or exactly one mole

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Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 15.4 u.
mixas84 [53]

Answer:

N, B, Be, C

Explanation:

N (Nitrogen) has 14.0067 B (Boron) has 10.81 Be (Beryllium) has 9 and C (Carbon) has 12

8 0
2 years ago
What is the percent composition of hydrogen in NH4HCO3?
Readme [11.4K]
To find the Percent Composition of an atom, you use this formula:
Mass of element in the compound you're studying on ( in this case it's 5 since there is 5 Hydrogens) over the mass of the compound (which is here 79), Multiplied by 100 since you want a percent. 
So we get: 
\frac{5}{79} * 100
So you get about: 
0.063 * 100
6.3

So, the percent composition of Hydrogen in NH4HCO3 is 6.3%

Hope this Helps! :D


7 0
3 years ago
Read 2 more answers
What will happen to the volume if the number of moles of a gas is decreased at constant temperature and pressure?
RoseWind [281]
The moles will probably die
4 0
3 years ago
Read 2 more answers
Best answer will be tagged brainliest.... no spamming pliz​
grin007 [14]

\huge \mathcal \fcolorbox{cyan}{black}{ \blue{AnSweR}}

A. Chloride ions (CI)

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5 0
3 years ago
A particular chemical reaction is exergonic. What can you say about the relationship between the reactants and the products in t
ozzi

Answer:

Products have a lower total Gibbs free energy in comparison with the reagents total Gibbs free energy.

Explanation:

Hello,

Exergonic chemical reactions are those that the overall Gibbs free energy is negative, it means that the products have a lower total Gibbs free energy, turning out into a spontaneous chemical reaction. Such reactions are thermodynamically possible under standard conditions and they usually release heat.

Best regards.

7 0
3 years ago
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