Uranium-232 has a half-life of 68.8 years. After 344.0 years, how much uranium-232 will remain from a 100.0-g sample?

1.56 g

3.13 g

5.00 g

20.0 g

How many dozens of doughnuts are in 48 doughnuts

Write the molecular balanced chemical equation and the net ionic equation for the reaction between ca (oh) 2 and hcl

How is solar power used to generate electricity?

Which best defines concentration?

The gas in the piston is being heated, and the piston has moved upward. The observation will be summarized in a row of the incomplete table below.

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days

Predict the spontaneity of a reaction (and the temperature dependence of the spontaneity) for each possible combination of signs for? H and? S (for the system).

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.