Provide the mass number of Fe, which has 29 neutrons

Tungsten-187 has a half life of 1.00 days. How much of a 10g sample will be left after 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, and 7 days?

The density of copper is 7.8g/mL true or false?

Is chlorine a compound, element, or mixture?

What is the molarity of a solution that contains 4.53 moles of lithium nitrate in 2.85 liters of solution? 0.874 M 0.629 M 3.77 M 1.59 M 2.57 M 1.98 M

True of False: Only conclusions that support the hypothesis should be reported in scientific research.

Calculate ∆h0 for the following reaction. br2 ( g. → br2 (l) ∆hf0 br2 ( g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)

Ethyl alcohol has a latent heat of vaporization of 850 J/g. Water has a latent heat of vaporization of 2260 J/g. Container A contains 1.0 kg of ethyl alcohol. Container B contains 1.0 kg of water. Both liquids are brought to a boil.

The greatest composition by mass in an atom 17/8 O is due to the total mass of its

1. What is the criteria' for designating an object an asteroid?

Extend E1 Explain why the arrangement, movement and energy of particles change during changes of state.