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frosja888 [35]
3 years ago
13

What element has 81 protons in the nuclei of its atoms?

Chemistry
2 answers:
WITCHER [35]3 years ago
7 0
Thallium has got 81 protons

<u>Have a nice days.......</u>
Mademuasel [1]3 years ago
5 0

Thallium has 81 protons in the nuclei of its atoms.

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5. A standardized mass was known to weigh exactly 5.0000g. It was weighed on a newly
sergey [27]

Answer:

Absolute error = 0.001

% Error = 002 5

Explanation:

The absolute error is the the difference in the measured value and the actual value of a quantity.

Here the actual value is 5.0000 grams

The measured value is 5.001 grams

Absolute error

5.001 - 5.000\\= 0.001

Percent error

= \frac{AE}{AV}

Where AE stands for absolute error and AV stands for absolute value.

= \frac{0.001}{5.000} * 100\\

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5 0
3 years ago
The solubility of gas is 0.58 g/L at a pressure of 104 kPa. What is the solubility if it’s solubility pressure increases to 250
Oduvanchick [21]
Converting to pascal
104/1000=0.104=P1
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3 0
3 years ago
Read 2 more answers
Neon atoms are known to produce a mass spectrum that consists of three peaks at m/z values of 20, 21 and 22, with the relative a
wel

Answer:

Explanation:

m / z = 20 , 21 , 22

m / 1 = 20 , 21 , 22

m = 20 , 21 , 22 .

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=  (2240 + 4.41 + 244.2) / 123.31

= 2488.61 / 123.31

= 20.18

4 0
3 years ago
In which quadrant does the point (-11, -22) lie?
Nuetrik [128]
I believe it lies in the 3rd Quadrent
3 0
3 years ago
Which of the following statements is most accurate regarding atoms?
Tamiku [17]
You did not provide the statement, however, the most accurate things about atoms is that everything is made out of them in the entire universe, and they consist of protons, electrons, and neutrons. They create all substances in existence.
7 0
4 years ago
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