Answer:
See the answer below, please.
Explanation:
A precipitation reaction is defined as one that yields an insoluble compound (precipitate) as a product by mixing two different solutions. An example:
NaCl + AgN03 -> Agcl (precipitate) + NaN03
hydrogen is not balanced
the right balanced equation is
Fe2O3 + 3 H2 -> 2Fe + 3H2O
Answer:
number of raisins = 19866 raisins
Explanation:
First, we will convert all volumes to liters
1- For raisins:
We know that:
1 ml = 0.001 liter
One raisin has a volume of 0.2 ml
This means that:
volume of one raisin = (0.2*0.001) / 1 = 0.0002 liters
2- For the stomach:
Now, we are given that:
1 qt = 0.946 L
Therefore:
volume of stomach = (4.2*0.946) / 1 = 3.9732 liters
Now, we will get the number of raisins as follows:
Assume that the number of raisins required to completely fill the stomach is x.
Therefore:
volume of stomach = x * volume of raisin
3.9732 = 0.0002x
x = 19866 raisins
Hope this helps :)
It is only a physical change as you are only changing the state of the substance (from liquid to gas)
Answer:
468 h
Explanation:
Let's consider the reduction of chromium (III) to chromium that occurs in the electrolytic purification.
Cr³⁺ + 3 e⁻ → Cr
We can establish the following relations.
- 1 kg = 1,000 g
- The molar mass of Cr is 52.00 g/mol
- 1 mole of Cr is deposited when 3 moles of electrons circulate
- The charge of 1 mole of electrons is 96,468 c (Faraday's constant)
- 1 A = 1 c/s
- 1 h = 3,600 s
The hours that will take to plate 11.5 kg of chromium onto the cathode if the current passed through the cell is held constant at 38.0 A is:
