What is the only sure evidence for a chemical reaction?

Chemistry

1 answer:

kkurt [141]3 years ago

4 0

Change in colours change in state solid shape smell light no light

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An animal cell has a 0.9% saline environment is placed into a solution that is 9% saline. What will happen to the cell

Softa [21]

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.

7 0

3 years ago

If there are 10.0g of sucrose and 8.0 of oxygen, how many moles of sucrose are available for this reaction?

nordsb [41]

0.029 is the correct answer

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3 years ago

Three kilograms of steam is contained in a horizontal, frictionless piston and the cylinder is heated at a constant pressure of

lakkis [162]

Answer:

Final temperature: 659.8ºC

Expansion work: 3*75=225 kJ

Internal energy change: 275 kJ

Explanation:

First, considering both initial and final states, write the energy balance:

$U_{2}-U_{1}=Q-W$

Q is the only variable known. To determine the work, it is possible to consider the reversible process; the work done on a expansion reversible process may be calculated as:

$dw=Pdv$