You need to find the formula mass of NaCl first, which you find the amu of both sodium and chlorine on the periodic table and you add them both. Then you divide the 175.5g by the formula mass which I got 58 g to get 3.026 moles of NaCl. 4 sig figs because of the 175.5. I recommend doing it on your own to make sure you get the right answer. You divide the 175.5g of NaCl by the formula mass.
D since Francium has an atomic number (mass) of 87
Answer: -
The volume of the box is 8.6 x 10³ inch³ correct to 2 significant figures.
Explanation:-
The dimensions of a box are measured to be 18.4 inches by 17.92 inches by 26 inches.
We need to find the volume of the box.
We are told that the volume of the box can be found by multiplying these three dimensions.
Thus volume of the box = 18.4 inches x 17.92 inches x 26 inches.
= 8572.928 inch³
= 8.6 x 10³ inch³ correct to 2 significant figures.
The answer will be correct to 2 significant figures because 26 has just 2 significant figures.
In every balanced chemical equation, each side of the equation has the same number of <u>atoms</u> of reactants and products.
For example, let's take this chemical equation.
This is the chemical equation for carbon monoxide reacting with dihydrogen to form octane and water.
8 CO + 17 H2 → C8H18 + 8 H2O
On this side, we have 8 carbon monoxide atoms and 34 dihydrogen atoms.
On the other side, we have 8 carbon atoms and 18 hydrogen atoms + 16 hydrogen atoms.
Therefore, even though the coefficients are different there is still an equal number of atoms on each side.
8 Carbon Monoxide , 34 Dihydrogen = 8 Carbon Monoxide + 34 Dihydrogen
