Question
Explain the shape of BrF5.
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Similar questions
Describe the change in hybridisation (if any) of the Al atom in the following reaction.
$
AlCl_3+Cl^{-} \rightarrow AlCl_4^{-}
$
→$
AlCl_3+Cl^{-} \rightarrow AlCl_4^{-}
$
1. Two litres of an ideal gas at a pressure of 10 atm expands isothermally at $25^{\circ} C$ into a vacuum until itstotal volume is 10 litres. How much heat is absorbed and how much work is done in the expansion against a constant external pressure of 1 atm?
2. What is free energy in terms of thermodynamics?
3. Define a system.
→2. What is free energy in terms of thermodynamics?
3. Define a system.
- What is the oxidation number of 'S'in H2SO5
- Balance the following equation:
$\text{Zn}\text{(s)}+\text{NO}_3^-\text{(aq)}\xrightarrow{ \ \ \ \ \ \ \ \ }\text{Zn}^{2+}\text{(aq)}+\text{NH}_4^+\text{(aq)}+\text{H}^+$ (Acidic medium)
100mL of a liquid is contained in awn insulated container at a pressure of 1bar. The pressure is steeply increased to 100bar. The volume of the liquid is decreased by 1mL at this constant pressure. Find $\Delta\text{H}$ and $\Delta\text{U}.$
→A vessel contains 1.6g of dioxygen at STP (273.15K, 1 atm pressure). The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. Calculate
- Volume of the new vessel.
- Number of molecules of dioxygen.
Emission transitions in the Paschen series end at orbit $n =3$ and start from orbit n and can be represeted as $v =$ $3.29 \times 10^{15}(Hz)\left[1 / 3^2-1 / n ^2\right]$ Calculate the value of n if the transition is observed at 1285 nm . Find the region of the spectrum.
→Calculate the percentage of copper in a sample of CuCl2.
(Atomic mass of Cu = 63.5u, Cl = 35.5u)
(Atomic mass of Cu = 63.5u, Cl = 35.5u)
Balance the following equations by the oxidation number method.
$\text{Fe}^{2+}+\text{H}^++\text{Cr}_2\text{O}^{2-}_7\xrightarrow{ \ \ \ \ \ \ \ \ \ }\text{Cr}^{3+}+\text{Fe}^{3+}+\text{H}_2 \text{O}$
→$\text{Fe}^{2+}+\text{H}^++\text{Cr}_2\text{O}^{2-}_7\xrightarrow{ \ \ \ \ \ \ \ \ \ }\text{Cr}^{3+}+\text{Fe}^{3+}+\text{H}_2 \text{O}$
State the law of thermodynamics that was first formulated by Nernst in 1906. What is the utility of this law? The equilibrium constant for the reaction $\text{A}\rightleftharpoons\text{B}$ is 1.8 × 10-7 at 298K. Calculate the value of $\Delta\text{G}^\circ$ for the reaction (R = 8.314JK-1mol-1). Predict the feasibility of the reaction under standard states.
→Choose the correct answer.
→$\Delta\text{U}^\ominus$of combustion of methane is – X kJ mol–1. The value of $\Delta\text{H}^\ominus$ is:
-
$=\Delta\text{U}^\ominus$
-
$>\Delta\text{U}^\ominus$
-
$<\Delta\text{U}^\ominus$
-
$=0$