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Problem- A metal whose threshold frequency is 6.71 * 10^14 s^-1 emits an electron with a velocity of 6.95 * 10^5 m/s when radiation of 1.01 * 10^15 s^-1 strikes the metal. Use these data to calculate the mass of the electron
I require skilled aid to answer the given problem
Consider a 2430-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). If the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car?
Which of the following are ways that catalysts can speed up reactions rates? You must check all answers that apply.
4.5 g CH4(g) occupies 12.7L at 310K. Calculate the work, heat, energy, and enthalphy change upon expansion by 3.3L @p=constant. please show the equations used.
conversion of 0.95g of liquid water to steam at 100 clesius requires 2.1 kJ of heat. calculate the molar enthalpy of evaporation of water at 100 celsius
Three solutions are mixed together to form a single solution. one contains 0.2 mol pb(CH3COO)2, the second contain 0.1mol Na2S and the third contains 0.1mol CaCl2. A. write the net ionic equations for the precipitation reaction or reactions that o..
A solution is prepared by dissolving 21.9 NaOH in 116.0 water. The NaOH solution has a density of 1.15g/mL. What is the % mm concentration of the NaOh solution What is the molarity (M) of the solution. What is the total volume (mL) of the solution
choloine atom is more electronegative than carbon so there is a bond dipole alon the Cl-C bond why then is tetrachloromethane
If you had a mixture of NaCl and Na2CO3, would the action of concentrated H2SO4 enable you to decide whether both Chloride ions and carbonate ions were present
Can someone please show me the product, and the reaction by-product of the following reaction? Please make sure that the reaction is balanced. And draw the structure please
IF the temperature remains constant but the pressure is changed, can the phase state be changed. Why or why not.
Problem- Use charge balance to determine x in the formula for the sorosilicate bertrandite, Be 4 Si 2 O 7 (OH) x
Problem- Archaeologists removed some charcoal from a Native American campfire, burned it in O2, and bubbled the CO2 formed into a Ca(OH)2 solution (limewater). The CaCO3 that precipitated was filtered and dried. If 4.58 g of the CaCO3 had a radioa..
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