(Choose two answers.) a. Completes the electrical circuit by looping two wires together on its end b. Senses current on the circuit c. Creates current on the circuit d. Removes noise from the circuit 4. A PC NIC and a switch port create one electrical circuit to use when sending data from the PC to the switch.
Calculate the value of Ke for this system. 2 H2S (g) === 2 H2 (g) + S2 (g) [1.1(10-4] 7. At a given temperature, the following system has an equilibrium constant, Ke, of 0.27. C(g) + B(g) === 2 E(g) The system was established by placing 8.00 moles of C and 5.0 moles of B in a 4.0 L vessel. Calculate the concentration of all substances at equilibrium.
The spectrophotometer was set for 360 nm and the mode was changed to transmittance. The zero adjustment knob and 100% adjustment knob (using the blank) adjusted accordingly. The absorbance of each sample was measured at 360 nm. The wavelength was then set to 380 nm. The absorbance of each sample was calculated again after fixing the 100% adjustment knob to read 100.
Lab 4: Determination of Percent by Mass of the Composition in a Mixture by Gravimetric Analysis Introduction Thermal gravimetric analysis is used to determine the percent by mass is used to determine the percent by mass of a component in a mixture. When a mixture is heated to an appropriately high temperature, one component in the mixture decomposes to form a gaseous compound. The mass of this particular component is related to the mass of the gaseous compound. In this experiment, the percent by mass of sodium hydrogen carbonate (NaHCO3) and potassium chloride (KCl) in a mixture will be determined. Experimental First, we weighed 2 samples, each has 1 gram of NaHCO3-KCl mixture Second, we put the samples in 2 crucibles (A and B) and weighed them.
d. Their values get larger as the temperature is increased. e. An order equal to zero means there is no concentration dependence with rate. 2. The gas phase reaction A + B C has a reaction rate which is experimentally observed to follow the relationship rate = k[A]2[B]. The overall order of the reaction a. is first.
You have created a simple electrical circuit with a battery, wires, and a light bulb. Which of the following is true about this circuit? (Choose two answers.) a. The battery’s positive lead pushes current away from that lead, and c. The circuit creates a direct current.
high melting point, hard, brittle, slightly soluble in water, conductor of electricity when melted or in solution Molecular solid - crystalline solid that has molecules arranged in a particular configuration. low melting point, generally insoluble in water, nonconductor of electricity. Metallic solid - crystalline solid that has atoms of metals arranged in a definite pattern. low to high melting point, malleable, ductile, conductor of electricity, insoluble in most solvents. Lesson 13.6 Changes of physical state: * necessary to draw a temperature-energy graph to see the change in temperature with a constant application of heat Heat of fusion - the amount of heat required to melt 1.00 g of substance.
Figure 2 shows a circuit with a resistor R = 1.0 × 103 Ω, and a battery with potential difference of VB = 5.0V . (a) Solve the circuit in Figure 2. That is, find all unknown currents, voltages, and resistances. (b) What is the direction of the current? Note: I want the direction of the conventional current.
12 C. 5 D. 30 _____ 16. A voltaic cell has E0cell = +1.00 V. The cell reaction A. is not spontaneous B. has K = 1 C. has (G0 = 0 D. has a negative (G0 _____ 17. Which energy conversion takes place in a galvanic cell? A. electrical to chemical B. chemical to
The center-most part of an atom where the protons and neutrons 5. The weighted average mass of an element’s isotopes of that element 4. The smallest particle of an element that retains the properties 3. High-energy radiation that has no charge and no mass of neutrons 2. Atoms with the same number of protons but different numbers 1.