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tom-s clark

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calulate the heat energy in kJ required to convert 5.6g of solid ethanol at -117.8degrees celsius to gaseous ethanol at 92.5 degrees celsius. the molar mass of ethanol is 46g/mol. melting point is -114.1; boiling point is 78.2; specific heat of solid is 2.42

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Considering the reversible reaction HA <- > H^(+)+ A^(- ), where HA is weak acid and A^(-)is it's conjugate base. If at equilibrium the concentration of HA is 0.05 M and the concentration of A^(-)is 0.30 M, what is the fraction representation tat aqre in acid form of equilibrium?

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oxygen and carbon dioxide exchange occurs in the capillary membrane. true or false

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What is the force constant of the spring in such a scale if it stretches 7.2 cm for a 10.8 kg load in N/m?

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If you were on the Federal Reserve Board and you were concerned only with reducing high unemployment, you would implement monetary policy with a focus.

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2. Solve $2\sqrt{3}\tan(x/2) = -1 + \tan^2(x/2)$ where $0 \le x < 2\pi$

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can you help me with the grammar? can you help me with the grammar

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140 g of KNO3 in 200 g of water at 60°C

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Other than treating a person with an infection, name 3 medical procedures or therapies that antibiotics are used for.

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Problem 4.12 The figure below shows two identical LC circuits coupled by a common capacitance C with the directions of current flow indicated by arrows. The voltage equations are $V_1 - V_2 = L \frac{dI_a}{dt}$ and $V_2 - V_3 = L \frac{dI_b}{dt}$ whilst the currents are given by $\frac{dq_1}{dt} = -I_a$ $\frac{dq_2}{dt} = I_a - I_b$ and $\frac{dq_3}{dt} = I_b$ Solve the voltage equations for the normal coordinates ($I_a + I_b$) and ($I_a - I_b$) to show that the normal modes of oscillation are given by $I_a = I_b$ at $\omega_1^2 = \frac{1}{LC}$ and $I_a = -I_b$ at $\omega_2^2 = \frac{3}{LC}$ Note that when $I_a = I_b$ the coupling capacitance may be removed and $q_1 = -q_2$. When $I_a = -I_b$, $q_2 = -2q_1 = -2q_3$.

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