Any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material. This is a true statement.
<h3>Features of natural materials</h3>
Natural materials are the physical matters that are made from plants, animals and ground(environment) which has not been subjected to any chemical processes for modification.
But any natural material that has undergone any chemical process which has been designed and manufactured to fulfil a particular purpose is called a synthetic material.
Therefore, any physical matter that is obtained or made from plants, animals, or the ground without undergoing a chemical process is called a natural material.
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<span>For each inherited character an organism has two alleles for the gene controlling that character.. one form each parent</span>
Answer:
The heat of solution is 1.05 kJ/mol
Explanation:
NaOH → Molar mass 40 g/m
This is the mass in 1 mol
Calorimetry formula:
Q = m . c . ΔT
ΔT = T° final - T° initial = 24.5°C - 18.2°C = 6.3°C
mass = 40 g
c = 4.186 kJ/kg°C (the same as water)
So we have to convert 40 g to kg
40 g/1000 = 0.04 kg
Q = 0.04 kg . 4.186 kJ/kg°C . 6.3 °C = 1.05 kJ
Answer:
The new pH is 10.8031
Explanation:
Given information:
[NaA] = concentration = 2 M
[HA] = concentration = 2 M
V = volume = 1 L
15 g of NaOH added
Question: What is the new pH, pH = ?
Moles of NaA:
Moles of HA:
Moles of NaOH:
The reaction:
HA + NaOH → NaA + H₂O
Moles of NaA = 2 + 0.375 = 2.375 moles
Moles of HA = 2 - 0.375 = 1.625 moles
The value of Ka is 2.3x10⁻¹¹
The pKa:
Applying the Henderson's Hasselbach equation