( economic) (macro economic ) The aggregate demand (AD) curve is modelled by the following system of three equations: y = α0-α₁r +α₂g + α 3 (e + p³ − p) + α4yf (1) y = ßo + ß₁(m − p) + B₂r (2) r = rf - No - £₁ (e + pf − p) − α₂yƒ + N³y - (3) where y is the log of output, r is interest rate, m is the log of money supply, g is the log of government spending, e is the log of exchange rate, p is the log of price level, and a0, a1, a2, α3, α4, Bo, B1, B2, 0, 1, 2 and 3 are positive parameters. The superscript f denotes a variable of foreign country. a) Explain the economic relationships modeled in equations (1), (2) and (3)..

Without doing any calculations, match the following thermodynamic properties with their appropriate numerical sign for the following exothermic reaction. 2H2(g) + O2(g)–→2H20(g)

CH₂-COOH Citric acid has the formula HO-C-COOH I CH₂-COOH CH2–CDD - Na* + HD-C-CDD- Na CH₂-COO- COO-Na A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was diluted to 250 mL in a graduated volumetric flask. A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution using phenolphthalein indicator for the titration end-point. A) 0.0075 Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution. B) 0.576 D and is tribasic acid, forming the tri-sodium salt on complete neutralisation with sodium hydroxide. 1.44 0.00225

volume reactants gas products Na₂CO3 (s) + 2 HCI (aq) solution mass separate layer gram liquid solid coefficient CO₂ (g) + H₂O (1) + 2 NaCl (aq)|

2HF (g) = H₂(g) + F2 (g), Ke=1.0 x 10 -95 ibrium mixture contains mostly reactants. Desktop 100 2NO(g) + O₂(g) = 2NO₂(g), Kc = 6.0 × 10¹3 Address CO(g) + Cl₂ (g) = COC12 (g), Kc = 5.0 × 10-⁹ Equilibrium mixture contains mostly products. 8:18 PM ^ Tuesday 6/21/2022 ENG IN

The given fuel is methanol CH4O.

Consider the following data: HX → X- + H+ Ką = 6.61 · 10- 5 H2A + НА + Н + Ka = 2.68 · 10-7 Calculate the Keg for the following reaction: H2A + X¯ + HA¯ +HX Record your answer in scientific notation to 3 sig figs.

Question 2. Alldredge studies the properties of marine snow in Ref. [2]. The figure below is adapted from this work, and plots the mass of different particles of fecal marine snow as a function of their volume on a log-log scale. In[Particle Mass M (ug) / (1 µg)] 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 ● 0 Fecal snow Line of best fit 2 3 4 5 In[Particle Volume V (mm³) / (1 mm³)] 6

environmental chemist working for the Environmental Protection Agency (EPA) was directed to collect razor clams from a heavily-contaminated river superfund site and analyze them for cadmium (Cd²+) content using graphite furnace atomic absorption spectrometry (GFAAS). The chemist dried the clams at 95° C overnight and ground them in a scientific blender, resulting in ~ 50 g of homogenized dry weight. A representative 61.00 mg sample was taken from the ~ 50 g of dry material and dissolved in 100.00 mL of 0.1 M HCI to create a sample solution. Using the method of standard additions, the chemist prepared five standard solutions in 100.00-mL volumetric flasks, each containing 5.00-mĹ aliquots of the sample solution. Varying amounts of a 87.0 ppb (ug · L-1) cadmium standard were added to each of the flasks, which were then brought to volume with 0.1 M HCI. The solutions were then examined for their Cd²+ content using GFAAS, resulting in the following absorbance data. Sample Vol. (mL) Cd2+…

Suppose every molecule of dihydrogen monoxide requires exactly one oxygen atom, O, and two hydrogen atoms, H. The production function that describes this is Q=2H+O Q=H+20 Q=2HO Q=max{20,H} Q=max{0,2H} Q= 1/2*min{20,H} Q=1/2*min{0,2H}