Answer:
22.5L will be the new volume for the gas
Explanation:
Pressure and number of moles remains constant.
When the temperature for a sample of gas is increased, the volume will also be increased, acording to this relation:
V₁ / T₁ = V₂ / T₂
15L / 30°C = V₂ / 45°C
(15L / 30°C ). 45°C = 22.5L
We assume Ar, as an Ideal Gas
Answer:
3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)
Explanation:
We can write 3 kinds of equations:
- Molecular equation: includes all species in the molecular form. It is useful to write this one first so balancing is easier.
- Full ionic equation: includes all ions and species that do not dissociate in water.
- Net ionic equation: includes only ions that participate in the reaction (<em>not spectator ions</em>) and species that do not dissociate in water.
The reaction between CaCl₂ and Cs₃PO₄ in an aqueous solution is a precipitation (solid Ca₃(PO₄)₂ is formed) and a double displacement one.
<u>Molecular equation</u>
3 CaCl₂(aq) + 2 Cs₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) + 6 CsCl(aq)
<u>Full ionic equation</u>
3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 Cs⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 Cs⁺(aq) + 6 Cl⁻(aq)
<u>Net ionic equation</u>
3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)
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At first scientists/researchers observe a natural phenomenon. after enough observation, they make predictions why that phenomenon is happening and the reasons that lead to that particular phenomenon. then they generate scientific hypothesis to explain that phenomenon and after getting enough data they develop tests and perform experiments. And check the results they get and at last based on the results they conclude what actually is happening.
Answered by : ❝ AǫᴜᴀWɪᴢ ❞
Answer:
appx. 1.07 moles
Explanation:
175g of molecule Ca(NO3)2
To find the # of moles, use stoichoimetry.
1. We need the molar mass of Ca(NO3)2.
Ca mass: 40.08 g
NO3 mass: N + 3(O) --> 14.01 + 3(16.00) --> 62.01
Molar mass = Ca + 2(NO3) --> 40.08 + 2(62.01) --> 164.1 g
2. write out the calculation
175g Ca(NO3)2 * (1 mole Ca(NO3)2)/(molar mass of Ca(NO3)2)
175 g Ca(NO3)2 * (1 mole Ca(NO3)2)/(164.1 g Ca(NO3)2)
The g units cancel out and we're left with moles.
Simply perform the calculation now: 175*1/164.1 ≅1.07 moles
