Thorium-229 is a highly radioactive isotope. Use the chart to determine the half-life of Th-229. A) 7,340 years B) 8 years C) 16 years D) 22,020 years

Which of the following is a common property of the atoms in group 18 easy form chemical compound have a full outer shell element good conductors of electricity are highly reactive

What do chemical changes and physical changes have in common

When atoms lose or gain electrons in chemical reactions they form?

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.897 J/g•°C x 22°C B. Q = 0.75 g x 0.

The sales tax rate is 8%. If Jim bought a new Buick and paid a sales tax of $1,920, what was the cost of the Buick before the tax?

A gas has a pressure of 2.0 atm. If the temperature decreases from 250K to 125K and the volume remains constant, what will be the resulting pressure?

Calculate the number of moles of Barium hydroxide, Ba (OH) 2, present in a 100.0 g sample.

Which type of reaction occurs in the following? 2HgO (s) - - 2Hg (l) + O2 (g) 1. a decomposition reaction in which a metal is reduced 2. an acid-base neutralization reaction to produce oxygen gas a displacement 3.

Is pulverizing an aspirin a physical or chemical process

Explain two reasons why we can conclude that the rise of the water in the glass tube is due to root pressure and not transpiration or capillarity