Answer:
The mixing of two chemicals may result in the production of a gas which is lost to the air. This will reduce the mass of the chemical mixture, because mass is being lost in a gaseous form.
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Answer:
2.67 × 10⁻²
Explanation:
Equation for the reaction is expressed as:
CaCrO₄(s) ⇄ Ca₂⁺(aq) + CrO₂⁻⁴(aq)
Given that:
Kc=7.1×10⁻⁴
Kc= ![[Ca^{2+}][CrO^{2-}_4]](https://tex.z-dn.net/?f=%5BCa%5E%7B2%2B%7D%5D%5BCrO%5E%7B2-%7D_4%5D)
Kc= [x][x]
Kc= [x²]
7.1×10⁻⁴ = [x²]
x = 
x = 0.0267
x = 
Answer:
A number is right I think
<em>Answer:</em>
- Element: Element are pure substance consist of same type of atoms
- Compound: Form by combination of atoms of different elements.
<em>Distinguish features:</em>
- Compounds represented by chemical formula while elements are represented by symbols.
- Compounds have fixed ratios of atoms of different elements while in elements are distinguished by atomic no.
- Compounds can be converted into simple substance by chemical methods but the elements cant be converted into simpler substance by means of chemical methods.
<em>Example:</em>
- Water (H2O) is a compounds.
- Iron (Fe) is an element.
<em>Summary:</em>
- When two or more elements are mixed then compounds are formed.
