Answer:
Is pink in base solution, it provides a visual signal that a solution has changed from acid to a base, is colorless in acid solution.
Explanation:
As all the indicator, phenolphtalein has the property that turns pink when the solution that you have reaches a value of a pH of 9 or above. From 0 to 8 in a pH scale, is colorless. This point in which an indicator changes is it called equivalence point.
Put the cation (a positive ion, the metal in this case,) without changing anything, then the nonmetal, or anion. For the nonmetal, change the ending to -ide. For example, if you have potassium and chlorine, you would have potassium chloride. Hope this helps!
Various samples of the must be combusted in other to obtain a reliable result.
<h3>What is a bomb calorimeter?</h3>
The bomb calorimeter is used to obtain the energy of a sample. This is called the energy equivalent or the energy value of the sample.
Now, we know that the bomb calorimeter is calibrated by the use of benzoic acid hence it must be combusted first to obtain the basic energy value of the calorimeter.
Various samples of the must be combusted in other to obtain a reliable result.
Learn more about bomb calorimeter:brainly.com/question/24245395?
#SPJ1
I dont like that one of the people I have been to for years I can not live with that much because of my friends but they have a bad day
Fe is Iron, F is fluorine, for the formula FeF3, there is one molecule of FeF3; this molecule is comprised of one atom of Iron and 3 atoms of fluorine.
Now we need to fine the molecular mass of FeF3, we can do that by looking at the periodic table of element and finding the atomic mass of each element:
Fe = 55.845
F= 18.998
We must multiply the atomic mass of F (18.998) by 3 because there are 3 atoms on F, so we get: 56.994. Now we need to add the atomic mass of Fe (55.845) to the atomic mass of F3 to get: 112.839.
Now you have the weight of FeF3 (112.839). The formula is: Mole = grams/ amu (average atomic mass. The average atomic mass is 112.839 and the question tells us there are 24 grams FeF3, now we divide to get: 0.21 mol/g.
There are 0.21 mol in 24 grams of FeF3, now we need to convert to # of atoms. We can do that by using Avagadro's number: 6.022 • 10^23. We multiply 0.21 by 6.022 • 10^23 to get: 1.26462 • 10^23.
So that would mean that the number of atoms in 24 grams of FeF3 is: 1.26462 • 10^23.
Hope that helped.
