Can someone double check my answers? If I got them wrong please explain. 1.) What is the molarity of a 0.30 liter solution containing 0.50 moles of NaCl?
1.67M
2.) What is the Molarity of a 400 ml solution containing .80 moles of NaCl?
2M

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

Predict the products butane (c4h10) + oxygen —>

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball