Answer:
The grams of MgCl₂ that are needed are 63.1 g
Explanation:
First of all, try to think the equation and ballance it. This is it:
3MgCl₂ + 2Na₃PO₄ → Mg₃(PO₄)₂ + 6NaCl
Let's convert our f.u in mol
1 mol = 6.02x10²³ formula units (Avogadro's number)
So f.u / Avogadro = mol
1.33x10²³ / 6.02x10²³ = 0.221 moles.
So 1 mol of phosphate sodium comes from 3 mol of magnesium chloride.
How many mol of magnesium chloride are necessary, for 0.221 mol of phosphate.?
0.221 moles .3 = 0.663 moles.
Molar mass of MgCl₂ is 95.2 g/m
0.663 moles . 95.2 g/m = 63.1 g
As the given <span>moles OF ethanol = 0.040
now will find water moles that will b
moles of water = 1 - 0.040=0.96 (substract 1 from etahnol mole fraction)
now the
mass of water = 0.96 mol x 18.02 g/mol=17.3 g where 18 is atomic mass of water
mass of ethanol = 0.040 x 46 g/mol =1.84 g
now
mass of solution = 17.3 + 1.84=19.1 g that is mass of water +mass of etanol
Now
assume that the density of the solution = 1g/mL
so the
volume ofsolution = 19.1 mL = 0.0191 L
so finally the molarity will be
M = 0.040/ 0.0191=2.1
hope it helps</span>
Answer:
A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.
Explanation:
If only one atom of a specific type is present, no subscript is used. For atoms that have two or more of a specific type of atom present, a subscript is written after the symbol for that atom
Answer:
Complex System
Explanation:
Given that, a descriptive scientific investigation is one of the three main types of investigation which formulates and quantify the natural phenomenon. This natural phenomenon oftentimes involves Complex System, such as microscopic organisms, thereby, scientists often make observations to understand the interacting parts of this COMPLEX SYSTEM
Hence, the right answer is a COMPLEX SYSTEM
All organisms use the same genetic code. Living organisms are made of the other same components as all other matter, organisms that inhibit the earth at any one time. They are all assembled from a nucleic acid code. Hope that helped!
