Answer:
Distillation and using Chromatography
Explanation:
Distillation:
based on using boiling point.
Ex: separating a mixture of water and sugar by boiling the water away.
Chromatography:
based on absorption
Ex: separating the different colours that make up a black marker
The answer is (1). Monosaccharide<span>. Glucose is a simple form of sugar, found in your blood stream. It is generated by plants through the process of photosynthesis and then allows plants to grow.</span>
The mass of the sample of the material is 0.1664 g.
<h3 /><h3>What is specific heat?</h3>
The amount of energy needed to raise the temperature of one gram of a substance by one degree Celsius.
By the formula of specific heat
Given, that the specific heat (c) of material is 0.416 J/gC
The difference in temperatures is 30°C to 50°C
The mass=?
Q = heat, 50 J
Putting the values in the equation
Thus, the mass of the samples is 0.166 g.
Learn more about specific heat
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Answer: AgNO3 is the limiting reactant.
Explanation:
1) Balanced chemical equation:
<span>Given: 2AgNO3 + NiCl2 → 2AgCl + Ni(NO3)2
2) Mole ratios:
2 mol AgNO3 : 1 mol NiCl2 : 2 mol AgCl : 1 mol Ni(NO3)2
3) Convert 0.847 g of AgNO3 to moles
n = mass in grams / molar mass
molar mass = sum of the masses of all the atoms in the molecular formula
molar mass of AgNO3 = 107.9 g/mol + 14.0 g/mol + 3*16.0 g/mol = 169.9 g/mol
n = 0.847 g / 169.9 g/mol = 0.00499 mol AgNO3
4) Convert 0.650 g of NiCl2 to moles
n = mass in grams / molar mass
molar mass NiCl2 = 58.7 g/mol + 2*35.5 g/mol = 129.7 g/mol
n = 0.650 g / 129.7 g/mol = 0.00501 mol NiCl2
5) Compare the theoretical mole ratio with the actual ratio:
Theoretical mole ratio: 2 mol AgNO3 / 1 mol NiCl2
Actual ratio: 0.00499 mol AgNO3 / 0.00501 mol Ni Cl2 ≈ 1:1
Therefore, the amount of AgNO3 is half the required amount need to react with all the NiCl2, which means that the AgNO3 will react completely and there will be an excess of NiCl2. The reactant that is consumed completely while the other is left, is the limiting reactan. This is, AgNO3 is the limiting reactant.</span>
