If 25% of a radioactive element remains after 1,000 years, what is the half-life?

How do I drink antifreeze without dying

What is the concentration of an unknown Mg (OH) 2 solution if it took an average of 15.4mL of 0.100M HCl solution to neutralize 10.0mL of the Mg (OH) 2 solution? Your answer

Electronegativity is a measure of how easy it is for an atom to attract another electron. The elements He, Ne, and Ar have the lowest electronegativity values. What do these elements have in common? 1. They have an outer orbital full of electrons. 2.

A 4.55 l sample of water contains 0.115 g of sodium ions. determine the concentration of sodium ions in ppm if the density of the solution is 1.00 g/ml.

Where is energy stored in electromagnetic waves? a. in the wave's moving atoms b. in the oscillating electric and magnetic fields c. in the electromagnetic force d. in the wave's directional vector

Which organism is responsible for cleanup in this ecosystem? coyote vulture prairie dog grasshopper or prairie grass

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3