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A thermostat of the type used in furnace and heat pump control is shown in Fig. 5.22. The glass vial tilts back and forth so that electrical contacts are made via the mercury (an electrically conducting liquid metal), and the furnace or heat pump is turned off and on. Explain why the vial tilts back and forth.
The minerals in seawater can be obtained through evaporation. For every liter of seawater evaporated, 3.7 grams of Mg(OH)2can be obtained.
What is the maximum number of electrons that can occupy each of the following quantum numbers: (a) n=2, Ms= - half (b) n=5,I=3, Mi=-3; (d) n=4,I=0,mI=0
Treatment of an aldehyde or ketones with hydrazine, H2NNH2, yields an azine, R2C=N-N=CR2. Propose a mechanism
Calculate the intermolecular collision frequency and the mean free path in a sample of helium gas with a volume of 5.0 L at 27 degrees Celsius and 3.0 atm.
Cupric Sulfate is commonly sold as pentahydrate, which means that there are five moles of H2O for each mole of CuSO4. How many grams of cupric sulfate should be dissolved in a 250 mL volmetric flask to make a solution that is 508.0 ppm in Cu+2?
your chemiluminescence reaction will actually occur very slowly in air. what component of air will bring about this
A buffer is prepared by mixing 0.2 mole of HCOOH with 0.3 mole of NaHCOO in a volume of 200 ml. How many grams of NaOH must be added to achieve ph of 4
gaseous sulfur trioxide can be catalytically decomposed by flowing the gas down a heated tube. the reaction depends on
Nitrogen monoxide gas reacts with oxygen gas to produce nitrogen dioxide gas. what volume of nitrogen dioxide is produced from the reaction of 2 L nitrogen monoxide gas with 3 L oxygen gas?
Learning Goal: To apply the ideal gas law to problems involving temperature, pressure, volume, and moles of a gas.The four properties of gases (pressure P, volume V, temperature T, and moles of gas n) are related by a single expression known as the i..
indicate whether aqueous solutions of each of the following solutes will contain only ions, only molecules, or mostly molecules and a few ions: a) NH4Cl, a strong electrolyte. b)ethanol, CH3-CH2-OH, a nonelectrolyte. c)HCN, hydrocyanic acid, a wea..
suppose that a particular reaction evolves heat of 228 kj and that 40 kj of pv work is gained by the system. determine
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