Answer:
207.89g
Explanation:
The formula of the compound is:
Fe₂S₃
Find the molar mass of the compound;
Atomic mass of Fe = 55.845g/mol
S = 32.065g/mol
Now;
Molar mass of Fe₂S₃ = 2 (55.845) + 3 (32.065)
= 207.89g
Answer:
Most solids in solution exhibit a general trend of increasing solubility with increasing temperature.
A seed crystal may be added to a supersaturated solution to precipitate excess solute.
Explanation:
For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions(Lumen Learning).
When a seed crystal is added to a supersaturated solution, excess solute begin to precipitate because the seed crystal now furnishes the required nucleation site where the excess dissolved crystals now begin to grow.
Answer:
This question lacks options, the options are:
A. 2.89 x 1022
B. 8.66 x 1022
C. 3.66 x 1023
D. 1.10 x 1024
E. 3.29 x 1024
The answer is C. 3.66 × 10^23
Explanation:
In the chemical compound given as follows: Co2(HPO4)3, hydrogenphosphate ion is (HPO4)3.
Number of moles of hydrogenphosphate ion can be calculated using the formula
mole (n) = mass (m) /molar mass (MM)
Molar mass of (HPO4)3;
{1 + 31 + 16(4)}3
= {32 + 64)3
= (96)3
= 288g/mol
mole = 175/288
mole = 0.6076
mole = 0.607mol
The formula of units of hydrogenphosphate ion can be calculated by multiplying number of moles by Avogadro's number (6.022 × 10²³)
6.022 × 10²³ × 0.607
= 3.655 × 10²³
= 3.66 × 10²³
Color
Explanation:
Only color out of the listed observations is the qualitative observation. Qualitative observations are usually carried out using our senses.
- Sense of touch makes us feel the texture of particular subject.
- Sense of smell gives different types of scents and odors.
- Sense of sight helps us to identify different colors and appearances in a study.
- Sense of taste helps to know if something is bitter, sweet or sour.
- Sense of hearing helps to know how audible something it.
Qualitative observations does not involve the use of numbers.
Learn more:
observations brainly.com/question/5096428
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Rocks are made of many different materials. Different types of rocks are made from different sediments. Depending on the sediment that the rock is made of depends on how strong the rock will be. There are six main types of sedimentary rocks. All of the rocks are different colors depending on the sediments it consist of.
