The amount of grams of hydrogen that are in the water sample is;
3.985 g
<h3>Avogadro's number</h3>
We are given that;
Number of moles of oxygen in a sample of water = 12 × 10²³
- Now, the chemical formula of a molecule of water is H₂O. This means that for every 1 atom or molecule of oxygen, there must be 2 hydrogen atoms or molecules present.
Since Number of moles of oxygen in the sample is 12 × 10²³, then number of moles of hydrogen will be twice that = 2 × 12 × 10²³ = 24 × 10²³ moles
Now, molar mass of hydrogen is 1 g/mol and we know that;
Molar mass = Avogadro's number(6.023 × 10²³) moles
Thus;
6.023 × 10²³ moles = 1 g/mol
Thus; 24 × 10²³ moles of hydrogen = ( 24 × 10²³ × 1)/(6.023 × 10²³)
⇒ 3.985 g
Read more on Avogadro's number at; brainly.com/question/914267
The list is the best data validation that you should use if you want to restrict the values to a specific set.
<h3>What is data validation in a spreadsheet?</h3>
This is a feature in a spreadsheet such as excel that helps to control the entries that the users are allowed to input in a cell.
You can use this excel feature to ensure that a value is a number that is between 1 and 5.
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<u>Complete question:</u>
You want to restrict the values entered in a cell to a specified set, such as hop, skip, jump. Which type of data validation should you use?
database
list
input range
custom
Read more on data validation here: brainly.com/question/25895973
Based on the computation done, the value of the combined gross monthly income is $7630.
Since there are four weeks in a month, Joe's income will be:
= 23.50 × 40 × 4
= 3760
The value of Zola's income will be:
= 21.50 × (40 + 5) × 4
= 21.50 × 45 × 4
= 3870
Therefore, the combined gross monthly income will be;
= $3760 + $3870
= $7630
Learn more about gross income on:
brainly.com/question/15530787
Kids enjoy their work a lot
Answer: well Mr hoppie seems like a good person
Explanation: HES GETTING PIZZAAAAAAAAA
