This is a characteristic of a Thermosetting polymer.
Answer:
a usually reversible change in the physical properties of a substance, as size or shape
<u>For example:</u>
Freezing a liquid is a physical change.
Answer:
Explanation:
Let’s call water Component 1 and lactose Component 2.
According to Raoult’s Law,
where
p₁ and p₂ are the vapour pressures of the components above the solution
χ₁ and χ₂ are the mole fractions of the components
p₁° and p₂° are the vapour pressures of the pure components.
Data:
m₁ = 110.0 g; p₁° = 118.0 torr
m₂ = 50.00 g; p₂° = 0 torr
1. Calculate the moles of each component
2. Calculate the mole fraction of each component
3. Calculate the vapour pressure of the mixture
It is the lowest whole number ratio of ions represented in an ionic compound. Examples include ionic NaCl and K2O and covalent networks such as SiO2<span> and C (as diamond or graphite). Ionic </span>compounds<span> do not exist as individual molecules; a </span>formula unit<span> thus indicates the lowest reduced ratio of ions in the </span>compound<span>.</span>
Answer:
1x10⁻¹²
Explanation:
- Cu₂S(s) ⇌ 2Cu⁺(aq) + S²⁻(aq)
At equilibrium:
The equilibrium constant for the the reaction can be written as:
[Cu⁺] is squared because it has a stoichiometric coefficient of 2 in the reaction. <em>Cu₂S has no effect on the constant because it is a solid</em>.
Now we can <u>calculate the equilibrium constant</u>:
- Keq = (1.0x10⁻⁵)² * 1.0x10⁻² = 1x10⁻¹²