At STP, an element that is a brittle solid and a poor conductor of heat and electricity could have an atomic number of

(1) 12 (3) 16

(2) 13 (4) 17

Does a solution have to be a liquid mixture? Explain why or why not.

If a molecule is taking up more space is it gaining or losing energy explained

Mark notices he has dropped calls on his cell phone when he walks into his bedroom. his friend told him to try and were wrap aluminum foil around his phone to get better signal Mark talks on the phone 3 times while walking into his bedroom and drops

A chemical that causes a sudden, almost instantaneous release of pressure, gas and heat when subjected to sudden shock, pressure or high temperatures best describes which type of dot hazardous materials classification?

What happens if more product is added to a system at equilibrium apex?

A chemist reported that 100 gallons of a gas were available in a laboratory. Which property of the gas did the chemist report?

Is the water density higher than the aluminum density

How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12) ?

A gas has a volume of 30 L at 105 kPa. What pressure is required to compress the gas to 21 L?

Using special equipment which layer of the sun atmosphere is visible during a total solar eclipse