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sineoko [7]
3 years ago
9

How many conversion factors would you need to use to find the number of liters in a cubic decimeter? What are they?

Chemistry
1 answer:
suter [353]3 years ago
4 0
One liter is 1000 ml
1 ml is 1cm^3
One dm^3 is 1000 cm^3
Thus, 1 liter is 1 dm^3
The number of factors used is 4.
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Calculate the molality (m) of solution containing 20.5 g of ethylene glycol C,H,O,
Svetllana [295]

Answer:

Given

mass of solute (m) =20.5g

mass of solvent( ms) =155g

solution

malality =mX1000/mrxms

M=20.5x1000/62x155

M=2.1332

5 0
3 years ago
If 6 moles of sugar was added to a kilogram of water, the new boiling point would be _____ degrees C.
Andru [333]
Using the equation for boiling point elevation Δt
     Δt = i Kb m 
we can find the new boiling point T for the solution:
     Δt = T - 100∘C 
since we know that pure water boils at 100 °C.

We know that the van't Hoff Factor i is equal to 1 because sugar does not dissociate in water.

Also, the value of Ebullioscopic constant Kb for water is listed as 0.512 °C·kg/mol.

The molality m of the solution of 6 moles of sugar dissolved in a kilogram of water can be calculated as 
     m = 6 moles / 1 kg
         = 6 mol/kg

Therefore the new boiling point T would be
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     T = i Kb m + 100 °C.
        = (1) (0.512 °C·kg/mol) (6 mol/kg) + 100 °C
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3 0
4 years ago
In Lewis Structures, δ (delta) is used in conjunction with _______.
Monica [59]

Answer:

B. Electrical charges of polar covalent bonds

Explanation:

Lewis structures, also known as Lewis dot diagrams are diagrams that show the bonding between atoms of a molecule and lone pairs of an electron that may exist in the molecule.

Polar covalent bonds are bonds that occur where a pair of electrons is shared unevenly between two atoms

The Lewis notation as an agreed convection, uses the delta sign to indicate polar covalent bonds when they occur in compounds. It shows that the electrons are shared unevenly.

Consider the example attached below. The Lewis structure for HF is given. the δ+ is used to show the  electropositive Hydrogen atom while the δ- is used to show the electronegative Fluorine atom in the bond.

8 0
3 years ago
What In the formula Na3PO4 how many moles of sodium? How many moles of phosphorus? How many moles of oxygen?
yulyashka [42]
Sodium is Na, so there's 3 moles of that. Phosphorus is P, there's 1 mole of that. Oxygen is O, there's 4 moles of that.
5 0
3 years ago
Balance the chemichal equation:<br> NH3+CuO➡️Cu+N2+H2O
Gala2k [10]
2NH3+3CuO➡️3Cu+N2+3H2O
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3 years ago
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