we are given the the two reactants: AgNO3 and Na2CO3 and is asked to write a balanced equation and a net ionic equation for the reaction of the two. This is a double-replacement reaction:
2AgNO3 (aq)+ Na2CO3 (aq)= Ag2CO3 + 2NaNo3 (aq)
2 Ag + + 2 N03- + 2Na+ + CO32- = Ag2CO3 + 2 Na+ 2NO3-
cancelling the spectator ions, 2Ag + + CO32- = Ag2CO3
Answer:
A. Each amino acid has an amino group and a carboxyl group.
There is a key piece of information that we are missing.
we need the following:
Kb of water= 0.512
the change in boiling point (ΔTb) can be calculated using the following formula:
ΔTb= Kb x m
we already have Kb, but we need to determine the molality (m).
![molality (m)= \frac{moles glucose}{Kg H_2O}](https://tex.z-dn.net/?f=molality%20%28m%29%3D%20%5Cfrac%7Bmoles%20glucose%7D%7BKg%20H_2O%7D%20)
1) let's convert the grams of glucose to moles using the molar mass of it. The molecule formula of glucose is C₆H₁₂O₆.
molar mass C₆H₁₂O₆= (6 x 12.0) + (12 x 1.01) + (6 x 16.0)= 180 g/mol
![14.7g ( \frac{1 mol}{180 grams} )= 0.0817 moles](https://tex.z-dn.net/?f=14.7g%20%28%20%5Cfrac%7B1%20mol%7D%7B180%20grams%7D%20%29%3D%200.0817%20moles)
2) let's determine the Kilograms of water.
info:
density of water= 1.0 g/ mL or 1 grams = 1 mL
1000 grams= 1 kilogram
![150.0 mL = 150.0 grams](https://tex.z-dn.net/?f=150.0%20mL%20%3D%20150.0%20grams)
![150.0grams ( \frac{1 kg}{1000 grams} )= 0.1500 Kg](https://tex.z-dn.net/?f=150.0grams%20%28%20%5Cfrac%7B1%20kg%7D%7B1000%20grams%7D%20%29%3D%200.1500%20Kg)
3) let's plug in the values to solve for molality
![molality= \frac{0.0817 moles}{0.1500 Kg} = 0.545 m](https://tex.z-dn.net/?f=molality%3D%20%5Cfrac%7B0.0817%20moles%7D%7B0.1500%20Kg%7D%20%3D%200.545%20m)
finally, we can solve for change in boiling point.
ΔTb= Kb x m
ΔTb= (0.512) (0.545m)=
0.279°C
Answer:
for the first question, the context is necessary in order to answer...
Fat is immiscible (does not mix) with water because fat is nonpolar and water is polar (remember like dissolves like: polar mixes with polar, nonpolar with nonpolar).
soap bubbles by having many soap molecules surround fat molecules with their nonpolar end, and direct their polar ends outwards.
For your second question:
Dirt and oil are nonpolar. When we wash our bodies with water (which is polar) it does not do a good job in removing these nonpolar molecules. Soap, on the other hand, has a long nonpolar end and a small polar end. The nonpolar end of the soap molecule attaches to the dirt and oil on your skin and when the water from the shower head hits the soap, it pulls the dirt, oil, and soap off of you by attaching itself to the polar end of the soap molecule.
Explanation:
Answer:
The most mass of an atom is found in its nucleus(proton + neutron) since the mass of the electrons is negligible
to give you an estimate, protons are pretty small and electrons weigh about 1/2000 the mass of a proton