Element A has a half-life of 10 days. A scientist measures out 200 g of this substance. After 30 days has passed, the scientist reexamines the sample.

How much Element A will remain in the sample?

50 g

25 g

12.5 g

100 g

Sulfuric acid (h2so4) is spilled on a laboratory bench. which chemical would be useful for neutralizing the acid

Which statements describe surface waves? Check all that apply. They arrive before S waves. They travel slower than P waves. They result in much ground motion. They are produced by P and S waves. They travel deep below Earth's surface.

A chemical that can superheat or give off poisonous vapors when it comes in contact with air or water is called

If you were given 10.0 mL of 2.0 M H3X, how many milliliters of 2.0 M NaOH would it take to completely neutralize the acid?

Determine the h + of 0.005 KOH

What are the physical properties of toothpaste

What unit do scientists use to measure atoms?

Determine the number of moles in a container of gas at STP with a volume of 99.2L

State the number of significant 2804

For the reaction 2N 2O (g) ⇌ O 2 (g) + 2N 2 (g), what happens to the equilibrium position if the pressure increases?