Technetium-99 is used for brain scans. If a Laboratory receives a shipment of 200 g of this isotope, how much will remain after 24 hours? The Half-Life of

Technetium-99 is 6 hours.

If 0.923J of heat is added to 0.8817g of water, how much will the temperature increase? A. 1.73 B. 0.117 C. 0.0810 D. 0.250

If it take 118j of heat to increase the temperature of a 5.0g block of silver by 15 c, what is the specific heat capacity

A student reports three trials to measure the density of an unknown metal. indicate the most accurate value and why

What si unit would you use to measure the length and width of a music cd package

How many kilograms of iron can be extracted from 2.0 metric tons

All the isotopes of a given atom have (1) the same mass number and the same atomic number (2) the same mass number but different atomic numbers (3) different mass numbers but the same atomic number (4) different mass numbers and different atomic

A 2.40 L volume of air has a pressure of 101.7 kPa. If initially the pressure of the air was 101.01 kPa, what was the initial volume of air? Assume all other properties remain constant.

Water has a large K, value. True False

What mass of CO2 will sublimate given 500 kJ of energy at room temperature? (ΔHsub=26.1kJmole)

A sample of helium, at 20 °c, occupies a volume of 3.17 l at a pressure of 6.21 atm. what volume does this helium sample occupy if the pressure is reduced to 5.57 atm while maintaining the temperature at 20 °c?