The half-life for the alpha decay of24 bk to form24am is 1.40x10 y. suppose the energy of the alpha particle is 5.61 mev and that 1.05 g ofbk, freed of any other radioactive materials, were placed in a calorimeter containing 11.9 g of water, initially at 24.5°c. calculate the temperature the water would reach after 1.13 hour. neglect the heat capacity of the calorimeter and heat loss-to the surroundings. take the specific heat of water to be 4.184 j k g and the mass of a bk atom to be 247.070 u. (1 ev 1.6022 x 1019 j) °c

What material does not melt at any temperature

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.