How many atoms of Hydrogen are in 67.2 L of H2 at STP?

What chemical warfare agent (cwa) primarily attacks the airway and lungs, causing irritation of the entire airway from the nose to the lungs resulting in what is commonly known as dry-land drowning?

You need to prepare at 2.0 mL sample of a diluted drug for injection. The total amount of the drug to be injected in this 2.0 mL injection is 0.0210 mg of drug/kg-body mass. Assume the average body mass of 70 kg.

You have created a circuit in science class. You are using a 9 volt battery. You have generated what type of current? alternating current direct current

Which structure do both nonvascular plants and seedless vascular plants have in common

A 2 - ion has 36 electrons and 45 neutrons. what is its correct symbol

If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?

A helium balloon initially at room temperature is dunked into a bucket of liquid nitrogen (T = 77 K). Which of the following will occur?

Which statements indicate what the fossil record suggests about evolution on Earth? Check all that apply. Humans have only recently existed on Earth. Organisms originally lived only in Earth's water. Life on Earth started when water formed on Earth.

What does homogeneous mixture of elements mean

As an acid is added to neutral water the [OH-] will