Mass of object A = 10g
volume of object A = 8cm³
Mass of object B = 10g
Volume of Object B = 6cm³
we use the following formula to calculate the density of object A and B.
Density = Mass / Volume
Density of Object A = 10g / 8cm³ = 1.25g/cm³
Density of Object B = 10g / 6cm³ =1.67 g/cm³
So the density of object B is greater than object A
and if we find the difference:
1.67 - 1.25 = 0.42
So the answer is; Object B, by 0.42 gram per cubic centimeter
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The origin of the matter does not usually fall into chemistry
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The mechanical property of steel that characterizes its resistance to permanent deformation is ductility.
Am alloy is a substance prepared by adding one or more elements to a base or parent metal to obtain desirable properties.
Steel is an alloy of Iron and carbon in the composition of 99.8% and 0.2% respectively.
The mechanical or physical properties of steel include:
- It is more malleable and ductile than iron.
- It is harder and stronger.
- it can withstand great stress and strain.
The ductility of a metal like steel is the ability of a metal to change its shape without breaking, that is, resistance to permanent deformation.
Therefore, the mechanical property of steel that characterizes its resistance to permanent deformation is ductility.
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Chemical reaction: C₃H₇COOH → C₃H₇COO⁻ + H⁺.
c(<span>butanoic acid) = 0,100 M.
</span>α = 1,23% = 0,0123.
Ka = α² · c / 1 - α.
Ka = 0,0123² · 0,1 M / 1 - 0,0123.
Ka = 0,0000153 M.
Ka = c(C₃H₇COO⁻) · c(H⁺) / c(C₃H₇COOH).
c(H⁺) = α · c(C₃H₇COOH).
c(H⁺) = 0,0123 · 0,1 M = 0,00123 mol/L.
pH = -log c(H⁺).
pH = 2,91.
