Answer:
380g
Explanation:
Given parameters:
Number of moles of Fluorine = 20moles
Unknown:
Mass of Fluorine = ?
Solution:
The number of moles is the unit of quantifying the amount of particles in a substance.
So;
Mass of a substance = number of moles x molar mass
Molar mass of F = 19g/mol
Now;
Mass of F = 20 x 19 = 380g
There are 2 moles of NA2SO4 present in 284.078 grams of NA2SO4. Why? Well, we already know here that there are 284.078 grams of NA2SO4. To find how many moles are present in this compound, we would have to divide these grams by the molar mass of the compound. When we go to the periodic table of elements, we will find that there are two moles sodium (which represents 45.98 grams), one mole sulfur (which represents 32.06 grams), and four moles oxygen (which represents 64 grams). When combining these, we would get one mole of sodium sulfate which is representative of 142.04 grams total. That is our molar mass. Now that we have the molar mass, we can go back and divide. 284.078 divided by 142.04 is equal to about 1.99999, and that rounds up to 2 moles. Hence, there are 2 moles of NA2SO4 present in 284.078 grams of NA2SO4.
Your final answer: A is your answer.
If freezing<span> is slow, large ice crystals will form, </span>damaging<span> the cell walls of the </span>food Quick freezing<span> = small crystals </span>Slow freezing<span> = large crystals ... Heat is removing </span>so<span> quickly that there is little time for dehydration of the cells and ice will be formed inside the cells numerously as small ice crystals </span>
3. photosynthesis , 5. carbon dioxide , second blank of #2 is fossil fuels
Dalton's law states that the total pressure of a mixture of non-interacting gases is equal to the sum of their partial pressures.
In this case,
