Answers:
The average atomic mass will be closer to 7 amu, the average atomic mass of lithium is 6.94 amu and it is the same as the atomic mass on the periodic table.
Explanations:
We can predict that the average atomic mass will be closer to 7 amu because Li-7 has a much higher abundance on earth than Li-6.
To get the average atomic mass using isotopes, we must multiply the mass of each isotope by its natural abundance and then add the products.
(6.0151223 × 0.075) + (7.0160041 × 0.925)
= 0.45 + 6.49
= 6.94 amu
Our calculated average atomic mass is the same as the atomic mass on the periodic table.
Answer:
1,42M
Explanation:
Molar concentration is given in moles of solute per liter o solution. Assuming you have 100g of solution:
10g KCl × (1mol / 74,55g) = <em>0,134 moles of KCl</em>
As you have 100g of solution:
100g × (1mL / 1,06g) × (1L / 1000mL) = <em>0,0943L</em>
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That means molar concentration is:
0,134 moles of KCl / 0,0943L = <em>1,42M</em>
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I hope it helps!
Answer:
With the use of same chemicals, same gas will be produced while the use of different chemicals, different gases will be produced.
Explanation:
The same gas was produced in each assignment if the same chemicals are mixed with each other while different gases were produced in each assignment when different chemicals are allowed to mix. If every time, same chemicals and same concentration of chemicals are mixed together, the result will be the same means production of same gas but if different chemicals are allowed to mix, then the product will be the production of different gases.