Slime flows like a liquid, but unlike familiar liquids (e.g., oil, water), its ability to flow, or viscosity, is not constant. So it's a fluid, but not a regular liquid. Scientists call a material that changes viscosity a non-Newtonian fluid. The technical explanation is that slime is a fluid that changes its ability to resist deformation according to shear or tensile stress.
What this means is, when you pour slime or let it ooze through your fingers, it has a low viscosity and flows like a thick liquid. When you squeeze a non-Newtonian slime, like oobleck, or pound it with your fist, it feels hard, like a wet solid. This is because applying stress squeezes the particles in the slime together, making it hard for them to slide against each other.
Most types of slime are also examples of polymers. Polymers are molecules made by linking together chains of subunits.
The specifics of how a type of slime works depends on its chemical composition, but the basic explanation is that chemicals are mixed to form polymers. The polymers act as a net, with molecules sliding against each other.
Two solutions are combined to make classic slime. One is diluted school glue, or polyvinyl alcohol in water. The other solution is borax (Na2B4O7.10H2O) in water.
Borax dissolves in water into sodium ions, Na+, and tetraborate ions.
The tetraborate ions react with water to produce the OH- ion and boric acid:
B4O72-(aq) + 7 H2O <—> 4 H3BO3(aq) + 2 OH-(aq)
Boric acid reacts with water to form borate ions:
H3BO3(aq) + 2 H2O <— > B(OH)4-(aq) + H3O+(aq)
Hydrogen bonds form between the borate ion and the OH groups of the polyvinyl alcohol molecules from the glue, linking them together to form a new polymer: slime.
Answer:
12120 g + O2 = 15084 g
m Zn = 12.120 Kg
m óxido = 15.084 Kg
1. calcular la masa de cinc en gramos
g = 12,120 Kg x 1000 = 12120 g de cinc
g = 15.084 Kg x 100 = 15084 g de oxígeno
2. calcular gramos de Oxigeno
g O = 15084 g - 12120 g = 2964 g O2
3. calcular % de Zn y O
%m/m ( m soluto / m solc.) x 100
%m/m (Zn) = ( 1210 g / 15084 g ) x 100
% m/m (Zn) = 80.35 % = 80.35 g
%m/m (O) = ( 2964 g / 15084 g ) x 100
% m/m (Zn) = 19.65 % = 19.65 g
4. Calcular moles de cada elemento
Zn: 80.35 g / 65.38 g/mol = 1.228 mol
O: 19.65 g / 16 g/mol = 1.228 mol
5. dividir entre el menor de los elementos
Zn: 1.228 mol / 1.228 mol = 1
O: 1.228 mol / 1.228 mol = 1
6. Fórmula empírica: ZnO
Answer:
The reaction is favorable at all temperatures
Explanation:
Since G = H - TS, -H and +S would result in G = -H -TS, which will always be negative.
The concentration of cell is less than that of the solution .
Hence the cell will be called as hypotonic and the solution will be called as hypertonic.
in order to balance the concentration on the two sides of cell (inside and outside in the solution) there will be movement of solvent particles (through semipermeable membrane ) from cell (lower concentration of solute) to solution (higher concentration of solute).
Thus cell will shrink.
