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Suppose scientists discover a new element with atomic number 151 that they give the symbol "A" because there is no element with the symbol A. They find two isotopes of A: 334-A (82% abundance, atomic mass: 333.7 u) and 337-A (18% abundance, atomic mass 336.7 u). The best estimate of the atomic mass of the naturally occurring element A is:
What is the pH of a 0.440 ammonia solution? with the kb value of 1.8*10^-5 What is the percent ionization of ammonia at this concentration. Express the percentage numerically to three significant figures
A 0.10-cm^3 sample of a solution containing a radioactive nuclide (5.0x10^3 counts per minute per mL) is injected into a rat. Several minutes later 1.0 cm^3 of blood is removed. The blood shows 48 counts per minute of radioactivity. Calculate the ..
A giant sequoia tree cut down in 1891, in what is now Kings Canyon National Park northeast of Los Angeles, contained 1342 annual growth rings. If a sample of the tree was removed for radiocarbon dating
Question- The specific heat capacity of liquid mercury is 0.14 J/gK. How many joules of heat are needed to raise the temperature of 5.00 g of mercury from 20.0°C to 44.1°C
A tank containing carbon dioxide at 400K and 50 bar is vented until the temperature in the tank falls to 300K. Assuming there is no heat transfer between the gas and the tank
For a reaction where the general form of the rate law is = [A]m[B]n, the subsequent data were collected. Explain what is the order of the reaction with respect to A. Explain what is the order of the reaction with respect to B
Write the balanced molecular equation, the total ionic equation, and the net ionic equation
This acidity has affected many lakes in northern Europe, the northern United States, and Canada, reducing fish populations and affecting other parts of the ecological network within the lakes and surrounding forests
How do I find the delta H for the neutralization reaction given: HCl+NaOH-->H2O+NaCl using 0.05L of .5M HCl 0.055L of .5M NaOH Delta T=3.4Kelvin moles of H2O formed=.025moles of H2O
The water gained energy from the metal. Explain the interaction and heat exchange between the metal as well as the water from both the metal and the water utilizing equations and conventional signs/symbols.
How many kJ of energy and grams of CO2 are produced from the combustion of exactly one gallon of methanol. And how many kJ of energy and grams of CO2 are produced from the combustion of exactly one gallon of hexane?
Calculate the volume of water added to 0.410 L of 0.0340 M sodium hydroxide to obtain a 0.0110 M solution (assume the volumes are additive at these low concentrations).
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